

<!--XBRL Document Created with Wdesk from Workiva, formerly WebFilings-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <roleRef roleURI="http://www.aligntech.com/role/AccountingForIncomeTaxes" xlink:href="algn-20140930.xsd#AccountingForIncomeTaxes" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/AccountingForIncomeTaxesAdditionalInformationDetails" xlink:href="algn-20140930.xsd#AccountingForIncomeTaxesAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/AccruedLiabilitiesDetails" xlink:href="algn-20140930.xsd#AccruedLiabilitiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/ActivityUnderStockOptionPlansDetails" xlink:href="algn-20140930.xsd#ActivityUnderStockOptionPlansDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BalanceSheetComponents" xlink:href="algn-20140930.xsd#BalanceSheetComponents" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BalanceSheetComponentsAdditionalInformationDetails" xlink:href="algn-20140930.xsd#BalanceSheetComponentsAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BalanceSheetComponentsTables" xlink:href="algn-20140930.xsd#BalanceSheetComponentsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BusinessCombinationsDetails" xlink:href="algn-20140930.xsd#BusinessCombinationsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/BusinessCombinationsNotes" xlink:href="algn-20140930.xsd#BusinessCombinationsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/ChangeInCarryingValueOfGoodwillDetails" xlink:href="algn-20140930.xsd#ChangeInCarryingValueOfGoodwillDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CommitmentsAndContingencies" xlink:href="algn-20140930.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CommitmentsAndContingenciesTables" xlink:href="algn-20140930.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CommonStockRepurchaseProgram" xlink:href="algn-20140930.xsd#CommonStockRepurchaseProgram" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CommonStockRepurchaseProgramAdditionalInformationDetails" xlink:href="algn-20140930.xsd#CommonStockRepurchaseProgramAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/ComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockDetails" xlink:href="algn-20140930.xsd#ComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedBalanceSheets" xlink:href="algn-20140930.xsd#CondensedConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:href="algn-20140930.xsd#CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:href="algn-20140930.xsd#CondensedConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:href="algn-20140930.xsd#CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfOperations" xlink:href="algn-20140930.xsd#CondensedConsolidatedStatementsOfOperations" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CreditFacilities" xlink:href="algn-20140930.xsd#CreditFacilities" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/CreditFacilitiesAdditionalInformationDetails" xlink:href="algn-20140930.xsd#CreditFacilitiesAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/DocumentAndEntityInformation" xlink:href="algn-20140930.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/GoodwillAndLongLivedAssets" xlink:href="algn-20140930.xsd#GoodwillAndLongLivedAssets" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsImpairmentOfGoodwillDetails" xlink:href="algn-20140930.xsd#GoodwillAndLongLivedAssetsImpairmentOfGoodwillDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsTables" xlink:href="algn-20140930.xsd#GoodwillAndLongLivedAssetsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/IntangibleAssetsAsDirectResultFromCadentAcquisitionDetails" xlink:href="algn-20140930.xsd#IntangibleAssetsAsDirectResultFromCadentAcquisitionDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/InventoriesDetails" xlink:href="algn-20140930.xsd#InventoriesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/LegalProceedingsNotes" xlink:href="algn-20140930.xsd#LegalProceedingsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/LongLivedAssetsByGeographicAreaDetails" xlink:href="algn-20140930.xsd#LongLivedAssetsByGeographicAreaDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurements" xlink:href="algn-20140930.xsd#MarketableSecuritiesAndFairValueMeasurements" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsAdditionalInformationDetails" xlink:href="algn-20140930.xsd#MarketableSecuritiesAndFairValueMeasurementsAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsAvailableForSaleSecuritiesDetails" xlink:href="algn-20140930.xsd#MarketableSecuritiesAndFairValueMeasurementsAvailableForSaleSecuritiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsTables" xlink:href="algn-20140930.xsd#MarketableSecuritiesAndFairValueMeasurementsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/MinimumFutureLeasePaymentsForNonCancelableLeasesDetails" xlink:href="algn-20140930.xsd#MinimumFutureLeasePaymentsForNonCancelableLeasesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/NetProfitPerShare" xlink:href="algn-20140930.xsd#NetProfitPerShare" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/NetProfitPerShareTables" xlink:href="algn-20140930.xsd#NetProfitPerShareTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/NetRevenuesByGeographicAreaDetails" xlink:href="algn-20140930.xsd#NetRevenuesByGeographicAreaDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SegmentInformationDetails" xlink:href="algn-20140930.xsd#SegmentInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SegmentsAndGeographicalInformation" xlink:href="algn-20140930.xsd#SegmentsAndGeographicalInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SegmentsAndGeographicalInformationAdditionalInformationDetails" xlink:href="algn-20140930.xsd#SegmentsAndGeographicalInformationAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SegmentsAndGeographicalInformationTables" xlink:href="algn-20140930.xsd#SegmentsAndGeographicalInformationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/ShortTermAndLongTermMarketableSecuritiesDetails" xlink:href="algn-20140930.xsd#ShortTermAndLongTermMarketableSecuritiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensation" xlink:href="algn-20140930.xsd#StockBasedCompensation" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensationAdditionalInformationDetails" xlink:href="algn-20140930.xsd#StockBasedCompensationAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesDetails" xlink:href="algn-20140930.xsd#StockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensationStockBasedCompensationEmployeeStockPurchasePlanDetails" xlink:href="algn-20140930.xsd#StockBasedCompensationStockBasedCompensationEmployeeStockPurchasePlanDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/StockBasedCompensationTables" xlink:href="algn-20140930.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetails" xlink:href="algn-20140930.xsd#SummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfMsuPerformanceDetails" xlink:href="algn-20140930.xsd#SummaryOfMsuPerformanceDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfNonvestedSharesDetails" xlink:href="algn-20140930.xsd#SummaryOfNonvestedSharesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="algn-20140930.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="algn-20140930.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/TotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsDetails" xlink:href="algn-20140930.xsd#TotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.aligntech.com/role/WarrantyAccrualActivityDetails" xlink:href="algn-20140930.xsd#WarrantyAccrualActivityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <presentationLink xlink:role="http://www.aligntech.com/role/AccountingForIncomeTaxes" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_EC7725B8D719286B95AC18919A42D75E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_6391AB95C7D7C28DC28418919A424B08" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_EC7725B8D719286B95AC18919A42D75E" xlink:to="loc_us-gaap_StatementTable_6391AB95C7D7C28DC28418919A424B08" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_C3662BEABA7D82A8D8DE18919A4214B3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_6391AB95C7D7C28DC28418919A424B08" xlink:to="loc_dei_LegalEntityAxis_C3662BEABA7D82A8D8DE18919A4214B3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_174DE7FCC80294D58AD718919A4732FB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_C3662BEABA7D82A8D8DE18919A4214B3" xlink:to="loc_dei_EntityDomain_174DE7FCC80294D58AD718919A4732FB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_00353EC64DD28700021518919A47B8B6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_6391AB95C7D7C28DC28418919A424B08" xlink:to="loc_us-gaap_StatementLineItems_00353EC64DD28700021518919A47B8B6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_FE4F366440E77B00747C18919A47F4E7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_00353EC64DD28700021518919A47B8B6" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_FE4F366440E77B00747C18919A47F4E7" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/AccountingForIncomeTaxesAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureAccountingForIncomeTaxesAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureAccountingForIncomeTaxesAdditionalInformationAbstract_D537BAD23726BBD0E67B18919B6C6906" xlink:type="locator" />
    <loc xlink:href="algn-20140930.xsd#algn_IncomeTaxesTable" xlink:label="loc_algn_IncomeTaxesTable_1A15FD9BF31B20E23C4118919B6CDF38" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccountingForIncomeTaxesAdditionalInformationAbstract_D537BAD23726BBD0E67B18919B6C6906" xlink:to="loc_algn_IncomeTaxesTable_1A15FD9BF31B20E23C4118919B6CDF38" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_143ED370C55A500680D618919B6C1537" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesTable_1A15FD9BF31B20E23C4118919B6CDF38" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_143ED370C55A500680D618919B6C1537" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_637DE3F714C5DC6F2D8E18919B6CD175" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_143ED370C55A500680D618919B6C1537" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_637DE3F714C5DC6F2D8E18919B6CD175" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_E9D23886AC8EB4A710E418919B6C649B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_637DE3F714C5DC6F2D8E18919B6CD175" xlink:to="loc_us-gaap_ForeignCountryMember_E9D23886AC8EB4A710E418919B6C649B" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_IncomeTaxesLineItems" xlink:label="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesTable_1A15FD9BF31B20E23C4118919B6CDF38" xlink:to="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_ACCC16025B67768CC67418919B7111A7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_ACCC16025B67768CC67418919B7111A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_1A5400A39F3AEF333E8C18919B72B117" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_1A5400A39F3AEF333E8C18919B72B117" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_4F0424C30DC29D59243818919B72E4D6" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_4F0424C30DC29D59243818919B72E4D6" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_IncomeTaxExpenseBenefitNondeductibleExpenseImpairmentLossesAmount" xlink:label="loc_algn_IncomeTaxExpenseBenefitNondeductibleExpenseImpairmentLossesAmount_43A6A54ED8DE79279AEF18919B720646" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_algn_IncomeTaxExpenseBenefitNondeductibleExpenseImpairmentLossesAmount_43A6A54ED8DE79279AEF18919B720646" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_BEEF838A4B894B12E46718919B72526C" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_BEEF838A4B894B12E46718919B72526C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_5729A6118845C645827518919B720FEF" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_5729A6118845C645827518919B720FEF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_F5C7305F73EE617046D218919B72C102" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_F5C7305F73EE617046D218919B72C102" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_EffectiveIncomeTaxReconciliationatForeignIncomeTaxRate" xlink:label="loc_algn_EffectiveIncomeTaxReconciliationatForeignIncomeTaxRate_338E82517FB078AA187A18919B7235B8" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_algn_EffectiveIncomeTaxReconciliationatForeignIncomeTaxRate_338E82517FB078AA187A18919B7235B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxHolidays" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxHolidays_85A006A2F6F1E1FD20CA18919B72DAA0" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxHolidays_85A006A2F6F1E1FD20CA18919B72DAA0" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_EffectiveIncomeTaxRateReconciliationTaxHolidayEffectonDilutedEarningsPerShare" xlink:label="loc_algn_EffectiveIncomeTaxRateReconciliationTaxHolidayEffectonDilutedEarningsPerShare_872B9923E60755B30E4218919B726F88" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_IncomeTaxesLineItems_83FA9815AFD302184CFA18919B6C314B" xlink:to="loc_algn_EffectiveIncomeTaxRateReconciliationTaxHolidayEffectonDilutedEarningsPerShare_872B9923E60755B30E4218919B726F88" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/AccruedLiabilitiesDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureAccruedLiabilitiesAbstract" xlink:label="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_C595E3E7E9FFC4733A15CCF5BA56A1B9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_C595E3E7E9FFC4733A15CCF5BA56A1B9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedMarketingCostsCurrent" xlink:label="loc_us-gaap_AccruedMarketingCostsCurrent_41E7AE0CD6B2962307B8CCF5BA573AA9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_us-gaap_AccruedMarketingCostsCurrent_41E7AE0CD6B2962307B8CCF5BA573AA9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesAndExciseTaxPayableCurrent" xlink:label="loc_us-gaap_SalesAndExciseTaxPayableCurrent_0437401A1BEEAF984923CCF5BA57017E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_us-gaap_SalesAndExciseTaxPayableCurrent_0437401A1BEEAF984923CCF5BA57017E" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AccruedSalesAndMarketingCurrent" xlink:label="loc_algn_AccruedSalesAndMarketingCurrent_D2F77CBC63A5F320D86ACCF5BA57A6D8" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_algn_AccruedSalesAndMarketingCurrent_D2F77CBC63A5F320D86ACCF5BA57A6D8" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AccruedAccountsPayable" xlink:label="loc_algn_AccruedAccountsPayable_964A2F4CAAF3EEE4AAA4CCF5BA571079" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_algn_AccruedAccountsPayable_964A2F4CAAF3EEE4AAA4CCF5BA571079" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StandardProductWarrantyAccrualCurrent" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualCurrent_AB61E1FEBDB42336C864CCF5BA57547F" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualCurrent_AB61E1FEBDB42336C864CCF5BA57547F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent_398AD39CDA2E0B3E29D7CCF5BA570380" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_us-gaap_AccruedProfessionalFeesCurrent_398AD39CDA2E0B3E29D7CCF5BA570380" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_A6F31E1AD28241A54270CCF5BA576C26" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_A6F31E1AD28241A54270CCF5BA576C26" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_8CF9BF50117BBA4EF5B1CCF5BA5790AA" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_8CF9BF50117BBA4EF5B1CCF5BA5790AA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_5E85617451E0BAA3710DCCF5BA578199" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureAccruedLiabilitiesAbstract_2E2CC4062253C4B6E2B2CCF5BA562E12" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_5E85617451E0BAA3710DCCF5BA578199" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/ActivityUnderStockOptionPlansDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureActivityUnderStockOptionPlansAbstract" xlink:label="loc_algn_DisclosureActivityUnderStockOptionPlansAbstract_42B9ABC982C5B7B0C70B504087DE401C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D74117357D64C262304B504087DE0299" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureActivityUnderStockOptionPlansAbstract_42B9ABC982C5B7B0C70B504087DE401C" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D74117357D64C262304B504087DE0299" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_7C7AA3061E536F8DBACC504087DE933D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D74117357D64C262304B504087DE0299" xlink:to="loc_dei_LegalEntityAxis_7C7AA3061E536F8DBACC504087DE933D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6AC846FDFEE47FB879C5504087DE8CE6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_7C7AA3061E536F8DBACC504087DE933D" xlink:to="loc_dei_EntityDomain_6AC846FDFEE47FB879C5504087DE8CE6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8CC42FD42138826BCCC7504087DEBBB3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D74117357D64C262304B504087DE0299" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8CC42FD42138826BCCC7504087DEBBB3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_B1BC087B0AB5E7B80398504087DE7502" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8CC42FD42138826BCCC7504087DEBBB3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_B1BC087B0AB5E7B80398504087DE7502" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_A1BEEBBF7F82519683FE504087DE3A85" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_B1BC087B0AB5E7B80398504087DE7502" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_A1BEEBBF7F82519683FE504087DE3A85" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_BCD501C90E9CC6E22DE9504087DE6BD3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_B1BC087B0AB5E7B80398504087DE7502" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_BCD501C90E9CC6E22DE9504087DE6BD3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_D278F42E92F712FB28E1504087DE2C86" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_B1BC087B0AB5E7B80398504087DE7502" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_D278F42E92F712FB28E1504087DE2C86" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_B023BD98DC311CF612D2504087DEA921" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_B1BC087B0AB5E7B80398504087DE7502" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_B023BD98DC311CF612D2504087DEA921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_FBF37408109F5B2B5FF7504087DE114F" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_B1BC087B0AB5E7B80398504087DE7502" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_FBF37408109F5B2B5FF7504087DE114F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_7135DE32F23F6827266A504087DF1343" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_B1BC087B0AB5E7B80398504087DE7502" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_7135DE32F23F6827266A504087DF1343" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_2A3E47C0E62B4D6BF909504087DFC8D8" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_B1BC087B0AB5E7B80398504087DE7502" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_2A3E47C0E62B4D6BF909504087DFC8D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39E969934D247A9127E6504087DF6500" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8CC42FD42138826BCCC7504087DEBBB3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39E969934D247A9127E6504087DF6500" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_A1E6FB27B2D83A2F031E5047E7C6E08B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39E969934D247A9127E6504087DF6500" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_A1E6FB27B2D83A2F031E5047E7C6E08B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_DE25A44F9F225118CB2C504087DFD8ED" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39E969934D247A9127E6504087DF6500" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_DE25A44F9F225118CB2C504087DFD8ED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_00078D612ED02A0A9E71504087DF695A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39E969934D247A9127E6504087DF6500" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_00078D612ED02A0A9E71504087DF695A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_F1E976CAF59268E32B68504087DFDE13" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39E969934D247A9127E6504087DF6500" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_F1E976CAF59268E32B68504087DFDE13" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_DB81BBC3C566D285F000504087DF4FE7" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39E969934D247A9127E6504087DF6500" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_DB81BBC3C566D285F000504087DF4FE7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_0D56E0AE48A0479AE97A504087DF9B3C" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39E969934D247A9127E6504087DF6500" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_0D56E0AE48A0479AE97A504087DF9B3C" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_82380999ED0CE0A152FC504087DF04AF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8CC42FD42138826BCCC7504087DEBBB3" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_82380999ED0CE0A152FC504087DF04AF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_B60458485A1FCFB57DC7504087DF9ED9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_82380999ED0CE0A152FC504087DF04AF" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_B60458485A1FCFB57DC7504087DF9ED9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_89EF5627AA9C79AFBA87504087DF6AE0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_82380999ED0CE0A152FC504087DF04AF" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_89EF5627AA9C79AFBA87504087DF6AE0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_292F6374D81FAA4EB514504087DFAF08" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_82380999ED0CE0A152FC504087DF04AF" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_292F6374D81FAA4EB514504087DFAF08" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_67028DEB1764932AB687504087DF05E7" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8CC42FD42138826BCCC7504087DEBBB3" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_67028DEB1764932AB687504087DF05E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_5DBCB95303CA19030C69504087DF83FB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_67028DEB1764932AB687504087DF05E7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_5DBCB95303CA19030C69504087DF83FB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_E3C4F2BC5FB69963F699504087DF1D89" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_67028DEB1764932AB687504087DF05E7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_E3C4F2BC5FB69963F699504087DF1D89" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_1322D5E53B83C6AE798F504087E0C1CD" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_67028DEB1764932AB687504087DF05E7" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_1322D5E53B83C6AE798F504087E0C1CD" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BalanceSheetComponents" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_9C61585BD7DF1034C278CCF5BA625381" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SupplementalBalanceSheetDisclosuresTextBlock" xlink:label="loc_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_75C8437A760B45E5C0CECCF5BA62460D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_9C61585BD7DF1034C278CCF5BA625381" xlink:to="loc_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_75C8437A760B45E5C0CECCF5BA62460D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BalanceSheetComponentsAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureBalanceSheetComponentsAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureBalanceSheetComponentsAdditionalInformationAbstract_B992F9A37C9584AAC9A6CCF5BA51C496" xlink:type="locator" />
    <loc xlink:href="algn-20140930.xsd#algn_StandardProductWarrantyTimePeriod" xlink:label="loc_algn_StandardProductWarrantyTimePeriod_268792B886D3293539D8CCF5BA513790" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureBalanceSheetComponentsAdditionalInformationAbstract_B992F9A37C9584AAC9A6CCF5BA51C496" xlink:to="loc_algn_StandardProductWarrantyTimePeriod_268792B886D3293539D8CCF5BA513790" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BalanceSheetComponentsTables" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_DDB1930274585C85DA81CCF5BA5F9F12" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_234608E6D94747716B49CCF5BA5F0A28" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_DDB1930274585C85DA81CCF5BA5F9F12" xlink:to="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_234608E6D94747716B49CCF5BA5F0A28" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_6CD8F23928B41B98D0F8CCF5BA5F5E2C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_DDB1930274585C85DA81CCF5BA5F9F12" xlink:to="loc_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_6CD8F23928B41B98D0F8CCF5BA5F5E2C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_CBC720D7C10EA9D3054BCCF5BA5FF91C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_DDB1930274585C85DA81CCF5BA5F9F12" xlink:to="loc_us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_CBC720D7C10EA9D3054BCCF5BA5FF91C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BusinessCombinationsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_A8614FC8F34375A93C8CCCF5BA4792F7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_E90ECB01032DE6DB5564CCF5BA48DFFC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_A8614FC8F34375A93C8CCCF5BA4792F7" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_E90ECB01032DE6DB5564CCF5BA48DFFC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_A366D74E16267F7498EDCCF5BA48E1B2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_E90ECB01032DE6DB5564CCF5BA48DFFC" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_A366D74E16267F7498EDCCF5BA48E1B2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_89C39EFE3D1778623E5FCCF5BA482FF9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_A366D74E16267F7498EDCCF5BA48E1B2" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_89C39EFE3D1778623E5FCCF5BA482FF9" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_IcaHoldingsPtyLimitedMember" xlink:label="loc_algn_IcaHoldingsPtyLimitedMember_73721FD1DF96460027B8CCF5BA48A87D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_89C39EFE3D1778623E5FCCF5BA482FF9" xlink:to="loc_algn_IcaHoldingsPtyLimitedMember_73721FD1DF96460027B8CCF5BA48A87D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_69A04E977BC1DADCDF9ACCF5BA48AC64" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_E90ECB01032DE6DB5564CCF5BA48DFFC" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_69A04E977BC1DADCDF9ACCF5BA48AC64" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_F784B84AF4153C930249CCF5BA48F918" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_69A04E977BC1DADCDF9ACCF5BA48AC64" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_F784B84AF4153C930249CCF5BA48F918" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_66633BD0D6C9665B3FBDCCF5BA48E613" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_69A04E977BC1DADCDF9ACCF5BA48AC64" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_66633BD0D6C9665B3FBDCCF5BA48E613" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_D119D6412CAF2CF14F57CCF5BA483100" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_69A04E977BC1DADCDF9ACCF5BA48AC64" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_D119D6412CAF2CF14F57CCF5BA483100" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_45C7104F508FF3A3D295CCF5BA488144" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_69A04E977BC1DADCDF9ACCF5BA48AC64" xlink:to="loc_us-gaap_Goodwill_45C7104F508FF3A3D295CCF5BA488144" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/BusinessCombinationsNotes" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_14B18A25DA9CDB54531C18919A0E6B7C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="loc_us-gaap_BusinessCombinationDisclosureTextBlock_001681F3F7094890E3CA18919A0E1F00" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_14B18A25DA9CDB54531C18919A0E6B7C" xlink:to="loc_us-gaap_BusinessCombinationDisclosureTextBlock_001681F3F7094890E3CA18919A0E1F00" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/ChangeInCarryingValueOfGoodwillDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureChangeInCarryingValueOfGoodwillAbstract" xlink:label="loc_algn_DisclosureChangeInCarryingValueOfGoodwillAbstract_668F877A5863FA8E69B9CCF5BA3E0C1D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_0C715EE21D4722F4021ACCF5BA3EEB8E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureChangeInCarryingValueOfGoodwillAbstract_668F877A5863FA8E69B9CCF5BA3E0C1D" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_0C715EE21D4722F4021ACCF5BA3EEB8E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_F8852908C62AA01191D4CCF5BA3E353E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_0C715EE21D4722F4021ACCF5BA3EEB8E" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_F8852908C62AA01191D4CCF5BA3E353E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_8B7B6D93BBB5A2B28226CCF5BA3E74CC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_F8852908C62AA01191D4CCF5BA3E353E" xlink:to="loc_us-gaap_SegmentDomain_8B7B6D93BBB5A2B28226CCF5BA3E74CC" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ClearAlignerMember" xlink:label="loc_algn_ClearAlignerMember_9731838F1440AE19C2F8CCF5BA3E7688" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_8B7B6D93BBB5A2B28226CCF5BA3E74CC" xlink:to="loc_algn_ClearAlignerMember_9731838F1440AE19C2F8CCF5BA3E7688" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_90FB05AFFCC2FA14F0C5CCF5BA3E638E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_0C715EE21D4722F4021ACCF5BA3EEB8E" xlink:to="loc_us-gaap_GoodwillLineItems_90FB05AFFCC2FA14F0C5CCF5BA3E638E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_F2249F8235AA5F94D285CCF5BA3E9FA3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillLineItems_90FB05AFFCC2FA14F0C5CCF5BA3E638E" xlink:to="loc_us-gaap_GoodwillRollForward_F2249F8235AA5F94D285CCF5BA3E9FA3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_52D4FA379C7596FA3849CCF5BA3FBA51" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_F2249F8235AA5F94D285CCF5BA3E9FA3" xlink:to="loc_us-gaap_Goodwill_52D4FA379C7596FA3849CCF5BA3FBA51" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments" xlink:label="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_C1FEFC511AD80A791F17CCF5BA3FB263" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_F2249F8235AA5F94D285CCF5BA3E9FA3" xlink:to="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_C1FEFC511AD80A791F17CCF5BA3FB263" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_DF03EB65CD4EF43586E8CCF5BA3FA307" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_F2249F8235AA5F94D285CCF5BA3E9FA3" xlink:to="loc_us-gaap_Goodwill_DF03EB65CD4EF43586E8CCF5BA3FA307" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CommitmentsAndContingencies" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_DE68AFB47FAF8E57D27518919C00D939" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_C6EFBE5061768F5C9E8518919C009B5A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_DE68AFB47FAF8E57D27518919C00D939" xlink:to="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_C6EFBE5061768F5C9E8518919C009B5A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CommitmentsAndContingenciesTables" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_42056EFA8E35C9D605DE189199FC1D91" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_367E87E55831C5F5F661189199FC852E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_42056EFA8E35C9D605DE189199FC1D91" xlink:to="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_367E87E55831C5F5F661189199FC852E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CommonStockRepurchaseProgram" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_0A1AA41D75514B2906A643E25AC31767" xlink:type="locator" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareRepurchaseProgramDisclosureTextBlock" xlink:label="loc_algn_ShareRepurchaseProgramDisclosureTextBlock_9E94A64631F95686970243E25AC5401A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_0A1AA41D75514B2906A643E25AC31767" xlink:to="loc_algn_ShareRepurchaseProgramDisclosureTextBlock_9E94A64631F95686970243E25AC5401A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CommonStockRepurchaseProgramAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureCommonStockRepurchaseProgramAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureCommonStockRepurchaseProgramAdditionalInformationAbstract_34E3D04BA5DAC5C649EC504087CAFFBD" xlink:type="locator" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareRepurchasesTable" xlink:label="loc_algn_ShareRepurchasesTable_FBFFFE6B4F64A6CE942C504087CB137F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureCommonStockRepurchaseProgramAdditionalInformationAbstract_34E3D04BA5DAC5C649EC504087CAFFBD" xlink:to="loc_algn_ShareRepurchasesTable_FBFFFE6B4F64A6CE942C504087CB137F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_71E69CB976F8F307F776504087CB7A46" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesTable_FBFFFE6B4F64A6CE942C504087CB137F" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_71E69CB976F8F307F776504087CB7A46" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_7A0B55EFC90813D57B3D504087CBDBFD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_71E69CB976F8F307F776504087CB7A46" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_7A0B55EFC90813D57B3D504087CBDBFD" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AcceleratedShareRepurchaseProgramMember" xlink:label="loc_algn_AcceleratedShareRepurchaseProgramMember_9F37EA9CB1597EBCBD8C504087CB1B87" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_7A0B55EFC90813D57B3D504087CBDBFD" xlink:to="loc_algn_AcceleratedShareRepurchaseProgramMember_9F37EA9CB1597EBCBD8C504087CB1B87" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareRepurchasesLineItems" xlink:label="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesTable_FBFFFE6B4F64A6CE942C504087CB137F" xlink:to="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount_BDAC6896216257CF1FF7504087CB9DA4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount_BDAC6896216257CF1FF7504087CB9DA4" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_StockRepurchaseProgramAuthorizedAmountforNextTwelveMonths" xlink:label="loc_algn_StockRepurchaseProgramAuthorizedAmountforNextTwelveMonths_9395FE5096569F090F77504087CBF76F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_algn_StockRepurchaseProgramAuthorizedAmountforNextTwelveMonths_9395FE5096569F090F77504087CBF76F" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AcceleratedShareRepurchaseContractedAmountofRepurchase" xlink:label="loc_algn_AcceleratedShareRepurchaseContractedAmountofRepurchase_9B393411D60D328CB3A6504087CBA67C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_algn_AcceleratedShareRepurchaseContractedAmountofRepurchase_9B393411D60D328CB3A6504087CBA67C" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareRepurchaseProgramAmountPaid" xlink:label="loc_algn_ShareRepurchaseProgramAmountPaid_6A9CA37BD1369641D815504087CBE49A" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_algn_ShareRepurchaseProgramAmountPaid_6A9CA37BD1369641D815504087CBE49A" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AcceleratedShareRepurchaseInitialDeliveryofSharesShares" xlink:label="loc_algn_AcceleratedShareRepurchaseInitialDeliveryofSharesShares_FF30EBFA3E904341E8B2504087CB6008" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_algn_AcceleratedShareRepurchaseInitialDeliveryofSharesShares_FF30EBFA3E904341E8B2504087CB6008" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AcceleratedShareRepurchaseProgramFinalDeliveryofSharesShares" xlink:label="loc_algn_AcceleratedShareRepurchaseProgramFinalDeliveryofSharesShares_B2F690F0E5E84A2B56C6504087CB4E64" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_algn_AcceleratedShareRepurchaseProgramFinalDeliveryofSharesShares_B2F690F0E5E84A2B56C6504087CB4E64" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TreasuryStockSharesAcquired" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_C85851D72FB82367E18E504087CBBBC5" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_C85851D72FB82367E18E504087CBBBC5" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareRepurchasesPricePaidPerShare" xlink:label="loc_algn_ShareRepurchasesPricePaidPerShare_1F92AEA6F034EB2D12D0504087CB590C" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_algn_ShareRepurchasesPricePaidPerShare_1F92AEA6F034EB2D12D0504087CB590C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_66D0CEAF3CBBDEC9774B5055B6EAA69E" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_66D0CEAF3CBBDEC9774B5055B6EAA69E" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_StockRepurchasedDuringPeriodAveragePricePerShare" xlink:label="loc_algn_StockRepurchasedDuringPeriodAveragePricePerShare_AEBF2AD3D794354509A5505797B3E119" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_algn_StockRepurchasedDuringPeriodAveragePricePerShare_AEBF2AD3D794354509A5505797B3E119" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_27BE9BA6E548F4EA619850586E7F1778" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_27BE9BA6E548F4EA619850586E7F1778" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount_35AC36CCC02F0569419D504087CB1809" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount_35AC36CCC02F0569419D504087CB1809" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_StockExpectedtobeRepurchased" xlink:label="loc_algn_StockExpectedtobeRepurchased_78B52E658D180D2F7E845059ED283D63" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareRepurchasesLineItems_1DB6F0A4CF61DA802777504087CB4E80" xlink:to="loc_algn_StockExpectedtobeRepurchased_78B52E658D180D2F7E845059ED283D63" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/ComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract" xlink:label="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_EFFA901ED23C04A189E5504087B99501" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_EF46C29AFB1DA6D74203505E6BED6916" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_EFFA901ED23C04A189E5504087B99501" xlink:to="loc_us-gaap_NetIncomeLoss_EF46C29AFB1DA6D74203505E6BED6916" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_66BC89A5D8F54D4A4064505E6C272218" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_EFFA901ED23C04A189E5504087B99501" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_66BC89A5D8F54D4A4064505E6C272218" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_BEFD04D150BFF1FE7DF8505E6C44BB93" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_EFFA901ED23C04A189E5504087B99501" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_BEFD04D150BFF1FE7DF8505E6C44BB93" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_991757AC5C584C42B046505E6C6226BC" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_EFFA901ED23C04A189E5504087B99501" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_991757AC5C584C42B046505E6C6226BC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_CDDC70AF3E1D1BE0E5F2505E6C7F4D02" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_EFFA901ED23C04A189E5504087B99501" xlink:to="loc_us-gaap_EarningsPerShareBasic_CDDC70AF3E1D1BE0E5F2505E6C7F4D02" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_41CCEA5FB2BBF2A31314505E6C9FF45C" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureComputationOfBasicAndDilutedNetProfitPerShareAttributableToCommonStockAbstract_EFFA901ED23C04A189E5504087B99501" xlink:to="loc_us-gaap_EarningsPerShareDiluted_41CCEA5FB2BBF2A31314505E6C9FF45C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_65F251D3A0512B6B6DE6502CBCB8EA1A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_8551458BD459AFBD1D2C502CBCB82632" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_65F251D3A0512B6B6DE6502CBCB8EA1A" xlink:to="loc_us-gaap_AssetsAbstract_8551458BD459AFBD1D2C502CBCB82632" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_B804D8783B9EDB5566DB502CBCB8E135" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8551458BD459AFBD1D2C502CBCB82632" xlink:to="loc_us-gaap_AssetsCurrentAbstract_B804D8783B9EDB5566DB502CBCB8E135" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_D5DAFE384CBD81E1B201502CBCB8BAA2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B804D8783B9EDB5566DB502CBCB8E135" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_D5DAFE384CBD81E1B201502CBCB8BAA2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_EDDE168B13DE63A8F543502CBCB9B54F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B804D8783B9EDB5566DB502CBCB8E135" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_EDDE168B13DE63A8F543502CBCB9B54F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_2D91A50879D71C03C9D5502CBCB96810" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B804D8783B9EDB5566DB502CBCB8E135" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_2D91A50879D71C03C9D5502CBCB96810" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_61503166E63F8C561C03502CBCB9A80F" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B804D8783B9EDB5566DB502CBCB8E135" xlink:to="loc_us-gaap_InventoryNet_61503166E63F8C561C03502CBCB9A80F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_6FBB65D13976F454B61E502CBCB96AE3" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B804D8783B9EDB5566DB502CBCB8E135" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_6FBB65D13976F454B61E502CBCB96AE3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_24CAE2DCEA377304FCE4502CBCB965E4" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B804D8783B9EDB5566DB502CBCB8E135" xlink:to="loc_us-gaap_AssetsCurrent_24CAE2DCEA377304FCE4502CBCB965E4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_C24010456EA7C7C86C1A502CBCB97EBB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8551458BD459AFBD1D2C502CBCB82632" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_C24010456EA7C7C86C1A502CBCB97EBB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_92557B1683AE5B431C20502CBCB9C34A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8551458BD459AFBD1D2C502CBCB82632" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_92557B1683AE5B431C20502CBCB9C34A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_BE7462C72011244FD73B502CBCB9EE85" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8551458BD459AFBD1D2C502CBCB82632" xlink:to="loc_us-gaap_Goodwill_BE7462C72011244FD73B502CBCB9EE85" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_966CE5B16E24FD6F729F502CBCB9EC8A" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8551458BD459AFBD1D2C502CBCB82632" xlink:to="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_966CE5B16E24FD6F729F502CBCB9EC8A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_1A0EDC04EEAEA28E2E13502CBCB92766" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8551458BD459AFBD1D2C502CBCB82632" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_1A0EDC04EEAEA28E2E13502CBCB92766" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_94B2546B93E097F0D2D0502CBCB92999" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8551458BD459AFBD1D2C502CBCB82632" xlink:to="loc_us-gaap_Assets_94B2546B93E097F0D2D0502CBCB92999" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E864908952129906EE11502CBCB9374A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_65F251D3A0512B6B6DE6502CBCB8EA1A" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E864908952129906EE11502CBCB9374A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_31A67D1CDCE61B1BDB84502CBCB97C7F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E864908952129906EE11502CBCB9374A" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_31A67D1CDCE61B1BDB84502CBCB97C7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_0B2B60A2ADF75D117231502CBCB975F4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31A67D1CDCE61B1BDB84502CBCB97C7F" xlink:to="loc_us-gaap_AccountsPayableCurrent_0B2B60A2ADF75D117231502CBCB975F4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_D7B00BD4C6C27AABE133502CBCBBA8CB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31A67D1CDCE61B1BDB84502CBCB97C7F" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_D7B00BD4C6C27AABE133502CBCBBA8CB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_36008C15BA226C9EC6DF502CBCBBA8D8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31A67D1CDCE61B1BDB84502CBCB97C7F" xlink:to="loc_us-gaap_DeferredRevenueCurrent_36008C15BA226C9EC6DF502CBCBBA8D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_007021C5CF98F5D8C255502CBCBB6143" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31A67D1CDCE61B1BDB84502CBCB97C7F" xlink:to="loc_us-gaap_LiabilitiesCurrent_007021C5CF98F5D8C255502CBCBB6143" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_B55F64D743643D213FDD502CBCBB1B8D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E864908952129906EE11502CBCB9374A" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_B55F64D743643D213FDD502CBCBB1B8D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_013ADBF028FEE0CD0857502CBCBB66DA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E864908952129906EE11502CBCB9374A" xlink:to="loc_us-gaap_Liabilities_013ADBF028FEE0CD0857502CBCBB66DA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_419DC4E274816AD372EA502CBCBB9EEE" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E864908952129906EE11502CBCB9374A" xlink:to="loc_us-gaap_CommitmentsAndContingencies_419DC4E274816AD372EA502CBCBB9EEE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_B401955FFCEB7727FBED502CBCBB7167" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E864908952129906EE11502CBCB9374A" xlink:to="loc_us-gaap_StockholdersEquityAbstract_B401955FFCEB7727FBED502CBCBB7167" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_33B7CC7DE5447A4B80C8502CBCBB092A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_B401955FFCEB7727FBED502CBCBB7167" xlink:to="loc_us-gaap_PreferredStockValue_33B7CC7DE5447A4B80C8502CBCBB092A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_BD62DA1D4BF781BC2A87502CBCBB77F8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_B401955FFCEB7727FBED502CBCBB7167" xlink:to="loc_us-gaap_CommonStockValue_BD62DA1D4BF781BC2A87502CBCBB77F8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_6E8DAA9A30964D0585DE502CBCBB4303" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_B401955FFCEB7727FBED502CBCBB7167" xlink:to="loc_us-gaap_AdditionalPaidInCapital_6E8DAA9A30964D0585DE502CBCBB4303" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_D2B8F143EA1C74BBCF13502CBCBBBF3E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_B401955FFCEB7727FBED502CBCBB7167" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_D2B8F143EA1C74BBCF13502CBCBBBF3E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_AF92118F5E284C183441502CBCBB1531" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_B401955FFCEB7727FBED502CBCBB7167" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_AF92118F5E284C183441502CBCBB1531" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_1B2B4A55BE1E87EE73A4502CBCBB7A6A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_B401955FFCEB7727FBED502CBCBB7167" xlink:to="loc_us-gaap_StockholdersEquity_1B2B4A55BE1E87EE73A4502CBCBB7A6A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_9EEEF33F410EB28C0F64502CBCBBE327" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E864908952129906EE11502CBCB9374A" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_9EEEF33F410EB28C0F64502CBCBBE327" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_46AF34EF007728DA271818919BE1D7C8" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_064A1982CC36DBE7F26618919BE16FB7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_46AF34EF007728DA271818919BE1D7C8" xlink:to="loc_us-gaap_StatementTable_064A1982CC36DBE7F26618919BE16FB7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_D6454A011C67D1CBBAB518919BE1D368" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_064A1982CC36DBE7F26618919BE16FB7" xlink:to="loc_dei_LegalEntityAxis_D6454A011C67D1CBBAB518919BE1D368" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_AA6DF2616978C0EFA16618919BE173B4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_D6454A011C67D1CBBAB518919BE1D368" xlink:to="loc_dei_EntityDomain_AA6DF2616978C0EFA16618919BE173B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_064A1982CC36DBE7F26618919BE16FB7" xlink:to="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent" xlink:label="loc_algn_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent_ADCFDC1F810E78C4B28118919BE1CCA3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:to="loc_algn_AllowanceForDoubtfulAccountsReceivableAndSalesReturnsCurrent_ADCFDC1F810E78C4B28118919BE1CCA3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_3B8F6A9ABB96C0675DA118919BE16E20" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_3B8F6A9ABB96C0675DA118919BE16E20" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_18CF9173AEC7AF32B34618919BE1E0CE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_18CF9173AEC7AF32B34618919BE1E0CE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_5E8CE292B5B5E0E86C4618919BE15359" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:to="loc_us-gaap_PreferredStockSharesIssued_5E8CE292B5B5E0E86C4618919BE15359" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_19A33E568D5E2007CF5318919BE149AE" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_19A33E568D5E2007CF5318919BE149AE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_E7284B8A45A5EDAC39DF18919BE16A9F" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_E7284B8A45A5EDAC39DF18919BE16A9F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_8637A9DCBD820906946418919BE27BA3" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:to="loc_us-gaap_CommonStockSharesIssued_8637A9DCBD820906946418919BE27BA3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_386883390387421D35DD18919BE2BB9C" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_04EA04D9915DF3E3C21A18919BE1D219" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_386883390387421D35DD18919BE2BB9C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_7C8B66F507A3F15B9BF5502CBCA86781" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B5E027E86920DAA1CD1F502CBCA8B110" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7C8B66F507A3F15B9BF5502CBCA86781" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B5E027E86920DAA1CD1F502CBCA8B110" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_AD122B9F62CC1A915CB4502CBCA9855F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B5E027E86920DAA1CD1F502CBCA8B110" xlink:to="loc_us-gaap_NetIncomeLoss_AD122B9F62CC1A915CB4502CBCA9855F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_09481F7D798A824B76E9502CBCA9C95C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B5E027E86920DAA1CD1F502CBCA8B110" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_09481F7D798A824B76E9502CBCA9C95C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_090391A1BCB2EC178600502CBCA99265" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_09481F7D798A824B76E9502CBCA9C95C" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_090391A1BCB2EC178600502CBCA99265" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_20190F0709D370448003502CBCA955B3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_09481F7D798A824B76E9502CBCA9C95C" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_20190F0709D370448003502CBCA955B3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_0760208FA7B2B2E73C8B502CBCA9239E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_09481F7D798A824B76E9502CBCA9C95C" xlink:to="loc_us-gaap_ShareBasedCompensation_0760208FA7B2B2E73C8B502CBCA9239E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_DFD3647758F7C4F9B175502CBCA90D8D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_09481F7D798A824B76E9502CBCA9C95C" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_DFD3647758F7C4F9B175502CBCA90D8D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_DD8C271A12A2714ED2DC502CBCA95148" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_09481F7D798A824B76E9502CBCA9C95C" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_DD8C271A12A2714ED2DC502CBCA95148" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_F88DDA204D752A6193D3502CBCA9C71E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_09481F7D798A824B76E9502CBCA9C95C" xlink:to="loc_us-gaap_AssetImpairmentCharges_F88DDA204D752A6193D3502CBCA9C71E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_9EE301452AB82983AA27502CBCA99180" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_09481F7D798A824B76E9502CBCA9C95C" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_9EE301452AB82983AA27502CBCA99180" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_2F041632650A24A27B05502CBCA9DD90" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B5E027E86920DAA1CD1F502CBCA8B110" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_2F041632650A24A27B05502CBCA9DD90" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_AE40827658643D7D1E68502CBCA9A562" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_2F041632650A24A27B05502CBCA9DD90" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_AE40827658643D7D1E68502CBCA9A562" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_3DBE28215104FD1E2473502CBCA91324" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_2F041632650A24A27B05502CBCA9DD90" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_3DBE28215104FD1E2473502CBCA91324" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_8A1B321DF4565CECB4AE502CBCA93E15" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_2F041632650A24A27B05502CBCA9DD90" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_8A1B321DF4565CECB4AE502CBCA93E15" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_29BDAFD50B068CA9F94B502CBCAA9F97" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_2F041632650A24A27B05502CBCA9DD90" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_29BDAFD50B068CA9F94B502CBCAA9F97" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_31FB6BFD1F2AC05B625F502CBCAA0F5D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_2F041632650A24A27B05502CBCA9DD90" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_31FB6BFD1F2AC05B625F502CBCAA0F5D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_68ADEBB9CEFB43BBFDE7502CBCAA1F9E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_2F041632650A24A27B05502CBCA9DD90" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_68ADEBB9CEFB43BBFDE7502CBCAA1F9E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_E2B36939FDE894F2C3EE502CBCAAC1AF" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B5E027E86920DAA1CD1F502CBCA8B110" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_E2B36939FDE894F2C3EE502CBCAAC1AF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_FC9C806FF91A65D0597E502CBCAAA50F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7C8B66F507A3F15B9BF5502CBCA86781" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_FC9C806FF91A65D0597E502CBCAAA50F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_726D80B6710C648D91C3502CBCAA56FE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_FC9C806FF91A65D0597E502CBCAAA50F" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_726D80B6710C648D91C3502CBCAA56FE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0065B6D08702D7D1BD4F502CBCAA9AC4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_FC9C806FF91A65D0597E502CBCAAA50F" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0065B6D08702D7D1BD4F502CBCAA9AC4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_8ED31BD3D0EFCEB24865502CBCAA76C0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_FC9C806FF91A65D0597E502CBCAAA50F" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_8ED31BD3D0EFCEB24865502CBCAA76C0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_701177E5A119F105EC31502CBCAA4431" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_FC9C806FF91A65D0597E502CBCAAA50F" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_701177E5A119F105EC31502CBCAA4431" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_2CFDDC058894C0555F62502CBCAAFD48" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_FC9C806FF91A65D0597E502CBCAAA50F" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_2CFDDC058894C0555F62502CBCAAFD48" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_C6F515572B2ABFB5C246502CBCAADD5A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_FC9C806FF91A65D0597E502CBCAAA50F" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_C6F515572B2ABFB5C246502CBCAADD5A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3C771C6D2F807F9FF34E502CBCAAD40F" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_FC9C806FF91A65D0597E502CBCAAA50F" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3C771C6D2F807F9FF34E502CBCAAD40F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6B6ED62F5AC1701DDA2C502CBCAA4D06" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7C8B66F507A3F15B9BF5502CBCA86781" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6B6ED62F5AC1701DDA2C502CBCAA4D06" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_76DA82F1804764437B1F502CBCAA5235" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6B6ED62F5AC1701DDA2C502CBCAA4D06" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_76DA82F1804764437B1F502CBCAA5235" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_C14D743D0BAE824770CA502CBCAB3B0D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6B6ED62F5AC1701DDA2C502CBCAA4D06" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_C14D743D0BAE824770CA502CBCAB3B0D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_4F80F33D2D072A7453A4502CBCAB3AB3" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6B6ED62F5AC1701DDA2C502CBCAA4D06" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_4F80F33D2D072A7453A4502CBCAB3AB3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_B2AF3541CD29244EE243502CBCAB0F36" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6B6ED62F5AC1701DDA2C502CBCAA4D06" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_B2AF3541CD29244EE243502CBCAB0F36" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_F534F0036AA1295B0314502CBCAB94F6" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6B6ED62F5AC1701DDA2C502CBCAA4D06" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_F534F0036AA1295B0314502CBCAB94F6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_5A5B8CED9BD932638CFC502CBCAB3BBC" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6B6ED62F5AC1701DDA2C502CBCAA4D06" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_5A5B8CED9BD932638CFC502CBCAB3BBC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_F11EBB7CCF8AFCE03180502CBCABAEC0" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7C8B66F507A3F15B9BF5502CBCA86781" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_F11EBB7CCF8AFCE03180502CBCABAEC0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_2D94B2562D7E477ADB37502CBCABEFD1" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7C8B66F507A3F15B9BF5502CBCA86781" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_2D94B2562D7E477ADB37502CBCABEFD1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_E26636C91AB236147C64502CBCAB0D8E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7C8B66F507A3F15B9BF5502CBCA86781" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_E26636C91AB236147C64502CBCAB0D8E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_0749F6FF557A0B3FFD7D502CBCABF0D8" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7C8B66F507A3F15B9BF5502CBCA86781" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_0749F6FF557A0B3FFD7D502CBCABF0D8" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_B49A8679283B473B9146CCF589E6B01C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_6282E832551FCEA4CAD3CCF589E7AD02" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_B49A8679283B473B9146CCF589E6B01C" xlink:to="loc_us-gaap_NetIncomeLoss_6282E832551FCEA4CAD3CCF589E7AD02" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_ACD9D052B214671E6C86CCF589E792B1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_B49A8679283B473B9146CCF589E6B01C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_ACD9D052B214671E6C86CCF589E792B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_41ED43B52D11D06886E3CCF589E7D98C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_B49A8679283B473B9146CCF589E6B01C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_41ED43B52D11D06886E3CCF589E7D98C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_1B5CD314DF9C535EF37ACCF589E776F7" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_B49A8679283B473B9146CCF589E6B01C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_1B5CD314DF9C535EF37ACCF589E776F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_3C25853BABAA4702776CCCF589E7EA8E" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_B49A8679283B473B9146CCF589E6B01C" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_3C25853BABAA4702776CCCF589E7EA8E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CondensedConsolidatedStatementsOfOperations" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_3299B76DE4CB59177A0A502C84E8A30B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_SalesRevenueNet_3299B76DE4CB59177A0A502C84E8A30B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_E4381FBD155CE27D7FE2502C84EA552C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_CostOfRevenue_E4381FBD155CE27D7FE2502C84EA552C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_9D1B8846CCF6686FE57A502C84EAE059" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_GrossProfit_9D1B8846CCF6686FE57A502C84EAE059" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_4FEA9F599B65D350085E502C84EA43FC" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_OperatingExpensesAbstract_4FEA9F599B65D350085E502C84EA43FC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_FA5814BDDEE20262D4D6502C84EA0DFB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4FEA9F599B65D350085E502C84EA43FC" xlink:to="loc_us-gaap_SellingAndMarketingExpense_FA5814BDDEE20262D4D6502C84EA0DFB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_40346C1841D57A4085A9502C84EA1EB1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4FEA9F599B65D350085E502C84EA43FC" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_40346C1841D57A4085A9502C84EA1EB1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_82633AB87E0E1560E226502C84EAE68B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4FEA9F599B65D350085E502C84EA43FC" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_82633AB87E0E1560E226502C84EAE68B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_31BDA31D0790F6E5C4C8502C84EA1D3D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4FEA9F599B65D350085E502C84EA43FC" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_31BDA31D0790F6E5C4C8502C84EA1D3D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_116982EB36B34A988FD6502C84EAFA77" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4FEA9F599B65D350085E502C84EA43FC" xlink:to="loc_us-gaap_AssetImpairmentCharges_116982EB36B34A988FD6502C84EAFA77" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_4E4136E32F1EED7A8904502C84EA4844" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4FEA9F599B65D350085E502C84EA43FC" xlink:to="loc_us-gaap_OperatingExpenses_4E4136E32F1EED7A8904502C84EA4844" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_7F9B7E0005F99BA466DA502C84EAE6A1" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_OperatingIncomeLoss_7F9B7E0005F99BA466DA502C84EAE6A1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_039586AFF6FD1EB0FB8A502C84EA4DE1" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_039586AFF6FD1EB0FB8A502C84EA4DE1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_3AEF8A98AB91102A06C0502C84EA7FA0" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_3AEF8A98AB91102A06C0502C84EA7FA0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_1CDE5ADCA97394F7466E502C84EAFD52" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_1CDE5ADCA97394F7466E502C84EAFD52" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_DFAFF211B314D1AB98E3502C84EA6248" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_NetIncomeLoss_DFAFF211B314D1AB98E3502C84EA6248" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_FB1B4D5311DFAE528B60502C84EA707F" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_EarningsPerShareAbstract_FB1B4D5311DFAE528B60502C84EA707F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_7E3A4D193EDD061FF1C2502C84EB0D16" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_FB1B4D5311DFAE528B60502C84EA707F" xlink:to="loc_us-gaap_EarningsPerShareBasic_7E3A4D193EDD061FF1C2502C84EB0D16" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_5FEACD585207991CBCBD502C84EB810C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_FB1B4D5311DFAE528B60502C84EA707F" xlink:to="loc_us-gaap_EarningsPerShareDiluted_5FEACD585207991CBCBD502C84EB810C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_3D997C11289E8B7D4E67502C84EB201D" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A99D44C61CD1481AEEF7502C84E71020" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_3D997C11289E8B7D4E67502C84EB201D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_36DC32FB4BB20FB6B714502C84EBD7BA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_3D997C11289E8B7D4E67502C84EB201D" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_36DC32FB4BB20FB6B714502C84EBD7BA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_05E8ABA707F170D65507502C84EBD649" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_3D997C11289E8B7D4E67502C84EB201D" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_05E8ABA707F170D65507502C84EBD649" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CreditFacilities" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_FF19E67FF58AD4552CD118919A25B355" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_FCF38329BBBC7738716D18919A26927A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_FF19E67FF58AD4552CD118919A25B355" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_FCF38329BBBC7738716D18919A26927A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/CreditFacilitiesAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureCreditFacilitiesAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureCreditFacilitiesAdditionalInformationAbstract_E786E10DC891101065F018919A508D88" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_18FA53233286A2263DC918919A502954" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureCreditFacilitiesAdditionalInformationAbstract_E786E10DC891101065F018919A508D88" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_18FA53233286A2263DC918919A502954" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_8BBAC0EA11AD9B65C67218919A50B50C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_18FA53233286A2263DC918919A502954" xlink:to="loc_us-gaap_CreditFacilityAxis_8BBAC0EA11AD9B65C67218919A50B50C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_B3FA32D3A984C501B9BB18919A50EE17" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_8BBAC0EA11AD9B65C67218919A50B50C" xlink:to="loc_us-gaap_CreditFacilityDomain_B3FA32D3A984C501B9BB18919A50EE17" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_DC0A2BE43474F5D0855F18919A5174F8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_B3FA32D3A984C501B9BB18919A50EE17" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_DC0A2BE43474F5D0855F18919A5174F8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_6A07AF5FE92BC29BD5BF18919A51230B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_B3FA32D3A984C501B9BB18919A50EE17" xlink:to="loc_us-gaap_LetterOfCreditMember_6A07AF5FE92BC29BD5BF18919A51230B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_3866C1E2965659989FD518919A51BADB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_18FA53233286A2263DC918919A502954" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_3866C1E2965659989FD518919A51BADB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_FBD6BABDEBBE28513B9D18919A51AFD0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_3866C1E2965659989FD518919A51BADB" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_FBD6BABDEBBE28513B9D18919A51AFD0" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_WellsFargoMember" xlink:label="loc_algn_WellsFargoMember_3AAFE6133C6C2123B95F18919A5174FC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_FBD6BABDEBBE28513B9D18919A51AFD0" xlink:to="loc_algn_WellsFargoMember_3AAFE6133C6C2123B95F18919A5174FC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_1C6DC925C6AC3FFFF8CB18919A51B3AD" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_18FA53233286A2263DC918919A502954" xlink:to="loc_us-gaap_LineOfCreditFacilityLineItems_1C6DC925C6AC3FFFF8CB18919A51B3AD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_77A492DD65968F7CF6F818919A51EE2E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_1C6DC925C6AC3FFFF8CB18919A51B3AD" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_77A492DD65968F7CF6F818919A51EE2E" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_UnrestrictedCashDeposit" xlink:label="loc_algn_UnrestrictedCashDeposit_C66983C4FE1F35A65BAB18919A5166E3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_1C6DC925C6AC3FFFF8CB18919A51B3AD" xlink:to="loc_algn_UnrestrictedCashDeposit_C66983C4FE1F35A65BAB18919A5166E3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_F0B8701F8D0F489B0C5318919A515DF3" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_1C6DC925C6AC3FFFF8CB18919A51B3AD" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_F0B8701F8D0F489B0C5318919A515DF3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityAmountOutstanding" xlink:label="loc_us-gaap_LineOfCreditFacilityAmountOutstanding_27BD35448EFDA503886F18919A5115E1" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_1C6DC925C6AC3FFFF8CB18919A51B3AD" xlink:to="loc_us-gaap_LineOfCreditFacilityAmountOutstanding_27BD35448EFDA503886F18919A5115E1" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DocumentDocumentandEntityInformationAbstract" xlink:label="loc_algn_DocumentDocumentandEntityInformationAbstract_A9031C46CF0B08A047C218919C1607F6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntitiesTable" xlink:label="loc_dei_EntitiesTable_C28A9F31DAD86AC51E3318919C16A8CF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DocumentDocumentandEntityInformationAbstract_A9031C46CF0B08A047C218919C1607F6" xlink:to="loc_dei_EntitiesTable_C28A9F31DAD86AC51E3318919C16A8CF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_F633E6190150902BB5D018919C166855" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_C28A9F31DAD86AC51E3318919C16A8CF" xlink:to="loc_dei_LegalEntityAxis_F633E6190150902BB5D018919C166855" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_9559EF6390541C0BEC7818919C164B93" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_F633E6190150902BB5D018919C166855" xlink:to="loc_dei_EntityDomain_9559EF6390541C0BEC7818919C164B93" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_C28A9F31DAD86AC51E3318919C16A8CF" xlink:to="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_23D9D8E2ECDACAFBBFEA18919C16A033" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_TradingSymbol_23D9D8E2ECDACAFBBFEA18919C16A033" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_9FC07C45B818B05A4D1918919C16A7D4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_EntityRegistrantName_9FC07C45B818B05A4D1918919C16A7D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_4B5E06051829091E9B4218919C16D9E4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_EntityCentralIndexKey_4B5E06051829091E9B4218919C16D9E4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_F1907C07B7B73F4C228718919C17CFBA" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_CurrentFiscalYearEndDate_F1907C07B7B73F4C228718919C17CFBA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_D9F0EDEBD1D5F109064618919C178C8B" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_EntityFilerCategory_D9F0EDEBD1D5F109064618919C178C8B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_AC2B1D8C68B241C5FE6B18919C17242D" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_DocumentType_AC2B1D8C68B241C5FE6B18919C17242D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_657660A4D5189D29242D18919C17B553" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_DocumentPeriodEndDate_657660A4D5189D29242D18919C17B553" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_535669F2C6157D37EE8518919C17D3A3" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_DocumentFiscalYearFocus_535669F2C6157D37EE8518919C17D3A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_496882D023E3BB65276318919C17F9CF" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_DocumentFiscalPeriodFocus_496882D023E3BB65276318919C17F9CF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_69C597A776CFE04F5A0918919C17A875" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_AmendmentFlag_69C597A776CFE04F5A0918919C17A875" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_4D18CD7EFB2CE68C92E318919C17CA8C" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_D7569E30F67D33D7BAC818919C160F42" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_4D18CD7EFB2CE68C92E318919C17CA8C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/GoodwillAndLongLivedAssets" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_BCE60A24793F9F3EB3E5CCF5BA4406E8" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_BF5C327379BD2E031A04CCF5BA448DE6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_BCE60A24793F9F3EB3E5CCF5BA4406E8" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_BF5C327379BD2E031A04CCF5BA448DE6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsImpairmentOfGoodwillDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairmentAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairmentAbstract_63202264124A76019D0B5D5D56E2E435" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_E5D6E388971456B947715D5D56E388E7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetImpairmentAbstract_63202264124A76019D0B5D5D56E2E435" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_E5D6E388971456B947715D5D56E388E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_F6677DB3813947EC3C715D5D56E31B09" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_E5D6E388971456B947715D5D56E388E7" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_F6677DB3813947EC3C715D5D56E31B09" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_A73E9BBA0625A39CDA015D5D56E3D983" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_F6677DB3813947EC3C715D5D56E31B09" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_A73E9BBA0625A39CDA015D5D56E3D983" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_PropertyPlantEquipmentMember" xlink:label="loc_algn_PropertyPlantEquipmentMember_F5B996AE8CC747586A915D5D56E3758B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_A73E9BBA0625A39CDA015D5D56E3D983" xlink:to="loc_algn_PropertyPlantEquipmentMember_F5B996AE8CC747586A915D5D56E3758B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_9F21A8AAB9D11C4CB93A5D5D56E30FF5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_E5D6E388971456B947715D5D56E388E7" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_9F21A8AAB9D11C4CB93A5D5D56E30FF5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_FD7D6240B33B23ED6B4F5D5D56E327A6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9F21A8AAB9D11C4CB93A5D5D56E30FF5" xlink:to="loc_us-gaap_SegmentDomain_FD7D6240B33B23ED6B4F5D5D56E327A6" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ScannersAndCadcamMember" xlink:label="loc_algn_ScannersAndCadcamMember_17BB172302094DC43FB45D5D56E3DAEA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_FD7D6240B33B23ED6B4F5D5D56E327A6" xlink:to="loc_algn_ScannersAndCadcamMember_17BB172302094DC43FB45D5D56E3DAEA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_0EE2BC6472D440197C1A5D5D56E3C770" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_E5D6E388971456B947715D5D56E388E7" xlink:to="loc_us-gaap_GoodwillLineItems_0EE2BC6472D440197C1A5D5D56E3C770" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_5B6246DF27760596C78D5D5D56E3F296" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillLineItems_0EE2BC6472D440197C1A5D5D56E3C770" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_5B6246DF27760596C78D5D5D56E3F296" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_6E1907846FDFFFAC18D45D5D56E35567" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillLineItems_0EE2BC6472D440197C1A5D5D56E3C770" xlink:to="loc_us-gaap_AssetImpairmentCharges_6E1907846FDFFFAC18D45D5D56E35567" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_3C961EE02495D7FCD5615D5D56E3B2C3" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillLineItems_0EE2BC6472D440197C1A5D5D56E3C770" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_3C961EE02495D7FCD5615D5D56E3B2C3" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/GoodwillAndLongLivedAssetsTables" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_8634A4DDCB6A44F7231118919C1B72BC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfGoodwillTextBlock" xlink:label="loc_us-gaap_ScheduleOfGoodwillTextBlock_4767F848CA307B902FCC18919C1B2868" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_8634A4DDCB6A44F7231118919C1B72BC" xlink:to="loc_us-gaap_ScheduleOfGoodwillTextBlock_4767F848CA307B902FCC18919C1B2868" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_CBEB600B31B6FDD17A2518919C1B360C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_8634A4DDCB6A44F7231118919C1B72BC" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_CBEB600B31B6FDD17A2518919C1B360C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_18B7BB3660E3F390569918919C1BEC04" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_8634A4DDCB6A44F7231118919C1B72BC" xlink:to="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_18B7BB3660E3F390569918919C1BEC04" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/IntangibleAssetsAsDirectResultFromCadentAcquisitionDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureIntangibleAssetsAsDirectResultFromCadentAcquisitionAbstract" xlink:label="loc_algn_DisclosureIntangibleAssetsAsDirectResultFromCadentAcquisitionAbstract_EF9673EB781EC716F112CCF5BA38FFD2" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7E9839C60E4F964E78A3CCF5BA383E18" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureIntangibleAssetsAsDirectResultFromCadentAcquisitionAbstract_EF9673EB781EC716F112CCF5BA38FFD2" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7E9839C60E4F964E78A3CCF5BA383E18" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_E7937D6FE926DE043497CCF5BA38B1F8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7E9839C60E4F964E78A3CCF5BA383E18" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_E7937D6FE926DE043497CCF5BA38B1F8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_31BDD3ED2541D83C1D46CCF5BA38B1D6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_E7937D6FE926DE043497CCF5BA38B1F8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_31BDD3ED2541D83C1D46CCF5BA38B1D6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_F961691ED7FF30528ECFCCF5BA38E14A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_31BDD3ED2541D83C1D46CCF5BA38B1D6" xlink:to="loc_us-gaap_TrademarksMember_F961691ED7FF30528ECFCCF5BA38E14A" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ExistingTechnologyMember" xlink:label="loc_algn_ExistingTechnologyMember_13563FA405273C05AD7BCCF5BA382B12" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_31BDD3ED2541D83C1D46CCF5BA38B1D6" xlink:to="loc_algn_ExistingTechnologyMember_13563FA405273C05AD7BCCF5BA382B12" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_300F09E3013FBA926F01CCF5BA389323" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_31BDD3ED2541D83C1D46CCF5BA38B1D6" xlink:to="loc_us-gaap_CustomerRelationshipsMember_300F09E3013FBA926F01CCF5BA389323" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_0828099A7447F216E3D3CCF5BA389190" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_31BDD3ED2541D83C1D46CCF5BA38B1D6" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_0828099A7447F216E3D3CCF5BA389190" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_C23E5DBE2170D91B8CB0CCF5BA39ED98" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7E9839C60E4F964E78A3CCF5BA383E18" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_C23E5DBE2170D91B8CB0CCF5BA39ED98" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_E0319B53BEB53D67EA5DCCF5BA390217" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_C23E5DBE2170D91B8CB0CCF5BA39ED98" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_E0319B53BEB53D67EA5DCCF5BA390217" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_52B22815619A7D78CAE4CCF5BA391CEB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_C23E5DBE2170D91B8CB0CCF5BA39ED98" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_52B22815619A7D78CAE4CCF5BA391CEB" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_FiniteLivedIntangibleAssetsAccumulatedAmortizationPeriodIncreaseDecrease" xlink:label="loc_algn_FiniteLivedIntangibleAssetsAccumulatedAmortizationPeriodIncreaseDecrease_1F95622D1999A1F83122CCF5BA39E0DB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_C23E5DBE2170D91B8CB0CCF5BA39ED98" xlink:to="loc_algn_FiniteLivedIntangibleAssetsAccumulatedAmortizationPeriodIncreaseDecrease_1F95622D1999A1F83122CCF5BA39E0DB" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss" xlink:label="loc_algn_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss_B814D8A2AF9B426DA656CCF5BA39E128" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_C23E5DBE2170D91B8CB0CCF5BA39ED98" xlink:to="loc_algn_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss_B814D8A2AF9B426DA656CCF5BA39E128" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_8E040E2242BE286F6E59CCF5BA39A1AA" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_C23E5DBE2170D91B8CB0CCF5BA39ED98" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_8E040E2242BE286F6E59CCF5BA39A1AA" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/InventoriesDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureInventoriesAbstract" xlink:label="loc_algn_DisclosureInventoriesAbstract_B3D4E3C512F914C7E9CACCF5BA5BFAFF" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_952B695A47BBA7250997CCF5BA5BBA86" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureInventoriesAbstract_B3D4E3C512F914C7E9CACCF5BA5BFAFF" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_952B695A47BBA7250997CCF5BA5BBA86" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_C35824DB3E6346C8F019CCF5BA5B4670" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureInventoriesAbstract_B3D4E3C512F914C7E9CACCF5BA5BFAFF" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_C35824DB3E6346C8F019CCF5BA5B4670" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_5C74F11934AD33BBAD80CCF5BA5B02D4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureInventoriesAbstract_B3D4E3C512F914C7E9CACCF5BA5BFAFF" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_5C74F11934AD33BBAD80CCF5BA5B02D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_E4AA1868C32EBD1B8C37CCF5BA5BD3CC" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureInventoriesAbstract_B3D4E3C512F914C7E9CACCF5BA5BFAFF" xlink:to="loc_us-gaap_InventoryNet_E4AA1868C32EBD1B8C37CCF5BA5BD3CC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/LegalProceedingsNotes" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_LegalProceedingsAbstract" xlink:label="loc_algn_LegalProceedingsAbstract_032BCB493942F5D56AD718919BFE8F69" xlink:type="locator" />
    <loc xlink:href="algn-20140930.xsd#algn_LegalProceedingsTextBlock" xlink:label="loc_algn_LegalProceedingsTextBlock_7800F8F8F0207D10BC9218919BFF2824" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_LegalProceedingsAbstract_032BCB493942F5D56AD718919BFE8F69" xlink:to="loc_algn_LegalProceedingsTextBlock_7800F8F8F0207D10BC9218919BFF2824" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/LongLivedAssetsByGeographicAreaDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureLongLivedAssetsByGeographicAreaAbstract" xlink:label="loc_algn_DisclosureLongLivedAssetsByGeographicAreaAbstract_167CF3A4CCD6A17C4F2318919B61450A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8D0457DA439B4458B50A18919B61EB6E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureLongLivedAssetsByGeographicAreaAbstract_167CF3A4CCD6A17C4F2318919B61450A" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8D0457DA439B4458B50A18919B61EB6E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_C2B8226BCC82BCF2506D18919B611AAC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8D0457DA439B4458B50A18919B61EB6E" xlink:to="loc_dei_LegalEntityAxis_C2B8226BCC82BCF2506D18919B611AAC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_D24DAFE325E9E644BFFC18919B62C07D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_C2B8226BCC82BCF2506D18919B611AAC" xlink:to="loc_dei_EntityDomain_D24DAFE325E9E644BFFC18919B62C07D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_3ED99C6A4A4DE9A5FD4C18919B6219E6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8D0457DA439B4458B50A18919B61EB6E" xlink:to="loc_us-gaap_StatementGeographicalAxis_3ED99C6A4A4DE9A5FD4C18919B6219E6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_81EF94C84DB21ACEDBEF18919B62C135" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_3ED99C6A4A4DE9A5FD4C18919B6219E6" xlink:to="loc_us-gaap_SegmentGeographicalDomain_81EF94C84DB21ACEDBEF18919B62C135" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_US" xlink:label="loc_country_US_640B8477D1DCA6A3229318919B62FE27" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_81EF94C84DB21ACEDBEF18919B62C135" xlink:to="loc_country_US_640B8477D1DCA6A3229318919B62FE27" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_MX" xlink:label="loc_country_MX_CABDE05F7A3894FEEF6718919B62FCE7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_81EF94C84DB21ACEDBEF18919B62C135" xlink:to="loc_country_MX_CABDE05F7A3894FEEF6718919B62FCE7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_NL" xlink:label="loc_country_NL_B81928B30B41B649624318919B6268FF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_81EF94C84DB21ACEDBEF18919B62C135" xlink:to="loc_country_NL_B81928B30B41B649624318919B6268FF" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_OtherInternationalMember" xlink:label="loc_algn_OtherInternationalMember_F3D9C4B6FB931BADC9E218919B62B961" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_81EF94C84DB21ACEDBEF18919B62C135" xlink:to="loc_algn_OtherInternationalMember_F3D9C4B6FB931BADC9E218919B62B961" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_8C6937B0B6083AEA33CA18919B622E9D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8D0457DA439B4458B50A18919B61EB6E" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_8C6937B0B6083AEA33CA18919B622E9D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NoncurrentAssets" xlink:label="loc_us-gaap_NoncurrentAssets_C8782A253881770DF3C118919B62E85B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_8C6937B0B6083AEA33CA18919B622E9D" xlink:to="loc_us-gaap_NoncurrentAssets_C8782A253881770DF3C118919B62E85B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurements" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_6A2B5953AE500926593118919BF12574" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FinancialInstrumentsDisclosureTextBlock" xlink:label="loc_us-gaap_FinancialInstrumentsDisclosureTextBlock_258D2D0BC142140EDC0318919BF17C7C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_6A2B5953AE500926593118919BF12574" xlink:to="loc_us-gaap_FinancialInstrumentsDisclosureTextBlock_258D2D0BC142140EDC0318919BF17C7C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_1248280A83D21068E7115040882FF998" xlink:type="locator" />
    <loc xlink:href="algn-20140930.xsd#algn_MaturityPeriodUsedToClassifyInvestments" xlink:label="loc_algn_MaturityPeriodUsedToClassifyInvestments_642A0E26A22A1DEB9F145040882F4CFC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_1248280A83D21068E7115040882FF998" xlink:to="loc_algn_MaturityPeriodUsedToClassifyInvestments_642A0E26A22A1DEB9F145040882F4CFC" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_MarketableSecuritiesWeightedAverageRemainingMaturity" xlink:label="loc_algn_MarketableSecuritiesWeightedAverageRemainingMaturity_9713025110DF139CD4125040882F542F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_1248280A83D21068E7115040882FF998" xlink:to="loc_algn_MarketableSecuritiesWeightedAverageRemainingMaturity_9713025110DF139CD4125040882F542F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_EEBEC9C29408B402187F5040882FA03F" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_1248280A83D21068E7115040882FF998" xlink:to="loc_us-gaap_AssetImpairmentCharges_EEBEC9C29408B402187F5040882FA03F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_8FAECA9556DA5E8191F25040882F2C84" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_1248280A83D21068E7115040882FF998" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_8FAECA9556DA5E8191F25040882F2C84" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsAvailableForSaleSecuritiesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_64080A375015FC456D085D63ED7D9021" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesCurrent_6C7939EB521A99CFFB685D63ED7EE9BE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_64080A375015FC456D085D63ED7D9021" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesCurrent_6C7939EB521A99CFFB685D63ED7EE9BE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesNoncurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesNoncurrent_CEF1DE3C9B31DD8B78C05D63ED7EAABA" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_64080A375015FC456D085D63ED7D9021" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesNoncurrent_CEF1DE3C9B31DD8B78C05D63ED7EAABA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_2F69B5498F779BE7A34E5D63ED7E3E62" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_64080A375015FC456D085D63ED7D9021" xlink:to="loc_us-gaap_AvailableForSaleSecurities_2F69B5498F779BE7A34E5D63ED7E3E62" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MarketableSecuritiesAndFairValueMeasurementsTables" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_C8B86C1C26B4994973C8CCF5BA820F32" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesTextBlock" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesTextBlock_C11B653D6B94E124BA6DCCF5BA8356B2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_C8B86C1C26B4994973C8CCF5BA820F32" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesTextBlock_C11B653D6B94E124BA6DCCF5BA8356B2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock" xlink:label="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_44DC04E2728541B5CA56CCF5BA83C443" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_C8B86C1C26B4994973C8CCF5BA820F32" xlink:to="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_44DC04E2728541B5CA56CCF5BA83C443" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_E7CFE1A735CB410D0EECCCF5BA83554C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_C8B86C1C26B4994973C8CCF5BA820F32" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_E7CFE1A735CB410D0EECCCF5BA83554C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/MinimumFutureLeasePaymentsForNonCancelableLeasesDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract" xlink:label="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_ED8A9AA4642D6868B29C18919BEA8FDD" xlink:type="locator" />
    <loc xlink:href="algn-20140930.xsd#algn_OperatingLeasesFutureMinimumPaymentsDueRemainderOfPeriod" xlink:label="loc_algn_OperatingLeasesFutureMinimumPaymentsDueRemainderOfPeriod_D57047A7C79BB8C34CA618919BEA7229" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_ED8A9AA4642D6868B29C18919BEA8FDD" xlink:to="loc_algn_OperatingLeasesFutureMinimumPaymentsDueRemainderOfPeriod_D57047A7C79BB8C34CA618919BEA7229" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_4FCEBA8AEDB4004F5C4418919BEAF50F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_ED8A9AA4642D6868B29C18919BEA8FDD" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_4FCEBA8AEDB4004F5C4418919BEAF50F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_7ADD05A61CAC8434D08618919BEA0398" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_ED8A9AA4642D6868B29C18919BEA8FDD" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_7ADD05A61CAC8434D08618919BEA0398" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_6B402BA15839150443FB18919BEA55CD" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_ED8A9AA4642D6868B29C18919BEA8FDD" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_6B402BA15839150443FB18919BEA55CD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_D31F33181ACDA81315E618919BEA6A71" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_ED8A9AA4642D6868B29C18919BEA8FDD" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_D31F33181ACDA81315E618919BEA6A71" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_2ACEF8C2B92081C8F3F818919BEAEF6B" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_ED8A9AA4642D6868B29C18919BEA8FDD" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_2ACEF8C2B92081C8F3F818919BEAEF6B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_975593787EE2FC01590618919BEAC59C" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureMinimumFutureLeasePaymentsForNonCancelableLeasesAbstract_ED8A9AA4642D6868B29C18919BEA8FDD" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_975593787EE2FC01590618919BEAC59C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/NetProfitPerShare" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_3C755596B72787C3FCE718919C017557" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_B634B583CC7695B0225E18919C011F61" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_3C755596B72787C3FCE718919C017557" xlink:to="loc_us-gaap_StatementTable_B634B583CC7695B0225E18919C011F61" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_D2F66F456BEF6193AB6D18919C02B1C8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_B634B583CC7695B0225E18919C011F61" xlink:to="loc_dei_LegalEntityAxis_D2F66F456BEF6193AB6D18919C02B1C8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_E0A83B8AEDA19C32ACBA18919C027C72" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_D2F66F456BEF6193AB6D18919C02B1C8" xlink:to="loc_dei_EntityDomain_E0A83B8AEDA19C32ACBA18919C027C72" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_C22A318512790D7D44DE18919C0239E8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_B634B583CC7695B0225E18919C011F61" xlink:to="loc_us-gaap_StatementLineItems_C22A318512790D7D44DE18919C0239E8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_4F95EC5625A439B933B818919C021AFC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_C22A318512790D7D44DE18919C0239E8" xlink:to="loc_us-gaap_EarningsPerShareTextBlock_4F95EC5625A439B933B818919C021AFC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/NetProfitPerShareTables" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_862CBB0188A4C0CEB3DA189199FF997A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_0A6CD4E8F51103614888189199FF3CBD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_862CBB0188A4C0CEB3DA189199FF997A" xlink:to="loc_us-gaap_StatementTable_0A6CD4E8F51103614888189199FF3CBD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_4982A2BF718DDBD972E9189199FF8294" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_0A6CD4E8F51103614888189199FF3CBD" xlink:to="loc_dei_LegalEntityAxis_4982A2BF718DDBD972E9189199FF8294" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_4878D0D44C4C50F03B05189199FF7F21" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_4982A2BF718DDBD972E9189199FF8294" xlink:to="loc_dei_EntityDomain_4878D0D44C4C50F03B05189199FF7F21" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_D179A5CBB1EF8F9ECBBD18919A0402B8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_0A6CD4E8F51103614888189199FF3CBD" xlink:to="loc_us-gaap_StatementLineItems_D179A5CBB1EF8F9ECBBD18919A0402B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_7DA354578CA8A28EC34418919A050294" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_D179A5CBB1EF8F9ECBBD18919A0402B8" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_7DA354578CA8A28EC34418919A050294" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/NetRevenuesByGeographicAreaDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureNetRevenuesByGeographicAreaAbstract" xlink:label="loc_algn_DisclosureNetRevenuesByGeographicAreaAbstract_2B9A119CC9895E97900A18919C214B1F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_F7A676AC38775F3C4E2618919C21838B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureNetRevenuesByGeographicAreaAbstract_2B9A119CC9895E97900A18919C214B1F" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_F7A676AC38775F3C4E2618919C21838B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_92E799D8BD52A51481F318919C2178EE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_F7A676AC38775F3C4E2618919C21838B" xlink:to="loc_dei_LegalEntityAxis_92E799D8BD52A51481F318919C2178EE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_520C6AFC3964655801B218919C21EA67" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_92E799D8BD52A51481F318919C2178EE" xlink:to="loc_dei_EntityDomain_520C6AFC3964655801B218919C21EA67" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_B4D8D245E0AA71826AA218919C21ABE8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_F7A676AC38775F3C4E2618919C21838B" xlink:to="loc_us-gaap_StatementGeographicalAxis_B4D8D245E0AA71826AA218919C21ABE8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_136E40856FE00BEA2FE118919C21B0AD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_B4D8D245E0AA71826AA218919C21ABE8" xlink:to="loc_us-gaap_SegmentGeographicalDomain_136E40856FE00BEA2FE118919C21B0AD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_US" xlink:label="loc_country_US_843BC00A60E243877A8318919C218826" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_136E40856FE00BEA2FE118919C21B0AD" xlink:to="loc_country_US_843BC00A60E243877A8318919C218826" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_NL" xlink:label="loc_country_NL_82289F91AC2F810D5F4B18919C21F570" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_136E40856FE00BEA2FE118919C21B0AD" xlink:to="loc_country_NL_82289F91AC2F810D5F4B18919C21F570" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_OtherInternationalMember" xlink:label="loc_algn_OtherInternationalMember_0DFF9F661B3E260560CA18919C21408F" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_136E40856FE00BEA2FE118919C21B0AD" xlink:to="loc_algn_OtherInternationalMember_0DFF9F661B3E260560CA18919C21408F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_AA671E02495FA1101EB318919C21DE8D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_F7A676AC38775F3C4E2618919C21838B" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_AA671E02495FA1101EB318919C21DE8D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_DA168B5F21DEC463456318919C211676" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_AA671E02495FA1101EB318919C21DE8D" xlink:to="loc_us-gaap_SalesRevenueNet_DA168B5F21DEC463456318919C211676" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SegmentInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureSegmentInformationAbstract" xlink:label="loc_algn_DisclosureSegmentInformationAbstract_323F53CEDEE7257FA8F518919AB2CDB6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CC76BAB382C7FC6D603418919AB27732" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSegmentInformationAbstract_323F53CEDEE7257FA8F518919AB2CDB6" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CC76BAB382C7FC6D603418919AB27732" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_74B9AFD32C298D7DF8ED18919AB2EA2E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CC76BAB382C7FC6D603418919AB27732" xlink:to="loc_dei_LegalEntityAxis_74B9AFD32C298D7DF8ED18919AB2EA2E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_9B6B4A39CC6752A774A518919AB2A31B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_74B9AFD32C298D7DF8ED18919AB2EA2E" xlink:to="loc_dei_EntityDomain_9B6B4A39CC6752A774A518919AB2A31B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_450B4C3B53D6AA15FE6A18919AB234DF" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CC76BAB382C7FC6D603418919AB27732" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_450B4C3B53D6AA15FE6A18919AB234DF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_A6F1D891350DB37FA13618919AB3D5AA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_450B4C3B53D6AA15FE6A18919AB234DF" xlink:to="loc_us-gaap_SegmentDomain_A6F1D891350DB37FA13618919AB3D5AA" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ClearAlignerMember" xlink:label="loc_algn_ClearAlignerMember_59A31B8076F0F77357AF18919AB3108B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_A6F1D891350DB37FA13618919AB3D5AA" xlink:to="loc_algn_ClearAlignerMember_59A31B8076F0F77357AF18919AB3108B" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_InvisalignFullMember" xlink:label="loc_algn_InvisalignFullMember_CDAD322B4B8339611C6218919AB3B208" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ClearAlignerMember_59A31B8076F0F77357AF18919AB3108B" xlink:to="loc_algn_InvisalignFullMember_CDAD322B4B8339611C6218919AB3B208" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_InvisalignExpressliteMember" xlink:label="loc_algn_InvisalignExpressliteMember_2518521C6540503BE1C818919AB38DC1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ClearAlignerMember_59A31B8076F0F77357AF18919AB3108B" xlink:to="loc_algn_InvisalignExpressliteMember_2518521C6540503BE1C818919AB38DC1" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_InvisalignNonCaseRevenuesMember" xlink:label="loc_algn_InvisalignNonCaseRevenuesMember_B788E448D92EC57AFE5318919AB305FA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ClearAlignerMember_59A31B8076F0F77357AF18919AB3108B" xlink:to="loc_algn_InvisalignNonCaseRevenuesMember_B788E448D92EC57AFE5318919AB305FA" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ScannersAndCadcamMember" xlink:label="loc_algn_ScannersAndCadcamMember_100509B28E9E48BEAEAD18919AB38679" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_A6F1D891350DB37FA13618919AB3D5AA" xlink:to="loc_algn_ScannersAndCadcamMember_100509B28E9E48BEAEAD18919AB38679" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_0798B795898C9D8E1E9D18919AB3026C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_CC76BAB382C7FC6D603418919AB27732" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_0798B795898C9D8E1E9D18919AB3026C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_E16FD1CE6804A5D37D9B18919AB387F0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_0798B795898C9D8E1E9D18919AB3026C" xlink:to="loc_us-gaap_SalesRevenueNet_E16FD1CE6804A5D37D9B18919AB387F0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_3629354A786ED0BC404018919AB35AD6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_0798B795898C9D8E1E9D18919AB3026C" xlink:to="loc_us-gaap_GrossProfit_3629354A786ED0BC404018919AB35AD6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SegmentsAndGeographicalInformation" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_BB6A8C08A2783BE16BE3504087B3E205" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_CB85A21667FCD74F85B8504087B388C0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_BB6A8C08A2783BE16BE3504087B3E205" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_CB85A21667FCD74F85B8504087B388C0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SegmentsAndGeographicalInformationAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureSegmentsAndGeographicalInformationAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureSegmentsAndGeographicalInformationAdditionalInformationAbstract_C1DECED6734CAC2D074418919BA01C53" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_58C47ABB3CD6640EBEE618919BA0E2DE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSegmentsAndGeographicalInformationAdditionalInformationAbstract_C1DECED6734CAC2D074418919BA01C53" xlink:to="loc_us-gaap_NumberOfReportableSegments_58C47ABB3CD6640EBEE618919BA0E2DE" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SegmentsAndGeographicalInformationTables" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_6181ECDB59BF71DCC254504087B1B5A2" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_444ADEB2E2F4352CE124504087B1DD7F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_6181ECDB59BF71DCC254504087B1B5A2" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_444ADEB2E2F4352CE124504087B1DD7F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/ShortTermAndLongTermMarketableSecuritiesDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureShortTermAndLongTermMarketableSecuritiesAbstract" xlink:label="loc_algn_DisclosureShortTermAndLongTermMarketableSecuritiesAbstract_19235554863038CBCF37502CBC95A77F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_2C59D270BD3797B93C4E502CBC951CFE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureShortTermAndLongTermMarketableSecuritiesAbstract_19235554863038CBCF37502CBC95A77F" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_2C59D270BD3797B93C4E502CBC951CFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_BD5F7F8B6A9600FDF98D502CBC95ACE4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_2C59D270BD3797B93C4E502CBC951CFE" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_BD5F7F8B6A9600FDF98D502CBC95ACE4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_35D5DC795678CD7C247E502CBC955881" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_BD5F7F8B6A9600FDF98D502CBC95ACE4" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_35D5DC795678CD7C247E502CBC955881" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_2F693B9FE92CCAEB34B6502CBC96A386" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_35D5DC795678CD7C247E502CBC955881" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_2F693B9FE92CCAEB34B6502CBC96A386" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis" xlink:label="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_C244BA6405147808FC2A502CBC96BC39" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_2C59D270BD3797B93C4E502CBC951CFE" xlink:to="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_C244BA6405147808FC2A502CBC96BC39" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain" xlink:label="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_F83EA1757CA21C6D3C85502CBC96E7EB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_C244BA6405147808FC2A502CBC96BC39" xlink:to="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_F83EA1757CA21C6D3C85502CBC96E7EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_982B43500FA4198BDE27502CBC9628DF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_F83EA1757CA21C6D3C85502CBC96E7EB" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_982B43500FA4198BDE27502CBC9628DF" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_LongTermInvestmentsMember" xlink:label="loc_algn_LongTermInvestmentsMember_15D2D8B376E7E746FF42502CBC961163" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_F83EA1757CA21C6D3C85502CBC96E7EB" xlink:to="loc_algn_LongTermInvestmentsMember_15D2D8B376E7E746FF42502CBC961163" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_233B5181B3295C79BDF9502CBC9699FF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_2C59D270BD3797B93C4E502CBC951CFE" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_233B5181B3295C79BDF9502CBC9699FF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_233B5181B3295C79BDF9502CBC9699FF" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_5E4FFFAE93E4CCB57CAE502CBC96BA53" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:to="loc_us-gaap_CommercialPaperMember_5E4FFFAE93E4CCB57CAE502CBC96BA53" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_CorporateBondsMember" xlink:label="loc_algn_CorporateBondsMember_CB9375FEE795378FF3F3502CBC968AE7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:to="loc_algn_CorporateBondsMember_CB9375FEE795378FF3F3502CBC968AE7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AgencySecuritiesMember" xlink:label="loc_us-gaap_AgencySecuritiesMember_F3893CEEE4B6ADE1E95A502CBC9677EE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:to="loc_us-gaap_AgencySecuritiesMember_F3893CEEE4B6ADE1E95A502CBC9677EE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_9D82EB303DB2BE5AF022502CBC967EBA" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_9D82EB303DB2BE5AF022502CBC967EBA" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_MunicipalSecuritiesMember" xlink:label="loc_algn_MunicipalSecuritiesMember_53B96A9AC8E98F46AEF8502CBC9671F7" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:to="loc_algn_MunicipalSecuritiesMember_53B96A9AC8E98F46AEF8502CBC9671F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ForeignCorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_5C25E2B1C8454601A6E2502CBC9665BC" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:to="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_5C25E2B1C8454601A6E2502CBC9665BC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_2F8B16EE31B4B802172F502CBC970B59" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_2F8B16EE31B4B802172F502CBC970B59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_06DE67492963F5AEDD7950327BA053F5" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5FC9DF4F5577E34D44B4502CBC96D7BF" xlink:to="loc_us-gaap_CertificatesOfDepositMember_06DE67492963F5AEDD7950327BA053F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F31301A458C324A0BD76502CBC97A33F" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_2C59D270BD3797B93C4E502CBC951CFE" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F31301A458C324A0BD76502CBC97A33F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_C5BC80E043EB80C1D5CB502CBC97D105" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F31301A458C324A0BD76502CBC97A33F" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_C5BC80E043EB80C1D5CB502CBC97D105" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AvailableForSaleSecuritiesGrossUnrealizedGainInInvestments" xlink:label="loc_algn_AvailableForSaleSecuritiesGrossUnrealizedGainInInvestments_2A93676558D247D7B2F7502CBC97D85D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F31301A458C324A0BD76502CBC97A33F" xlink:to="loc_algn_AvailableForSaleSecuritiesGrossUnrealizedGainInInvestments_2A93676558D247D7B2F7502CBC97D85D" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AvailableForSaleSecuritiesGrossUnrealizedLossInInvestments" xlink:label="loc_algn_AvailableForSaleSecuritiesGrossUnrealizedLossInInvestments_F03B8BFBCCB2F5930BA6502CBC97FE16" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F31301A458C324A0BD76502CBC97A33F" xlink:to="loc_algn_AvailableForSaleSecuritiesGrossUnrealizedLossInInvestments_F03B8BFBCCB2F5930BA6502CBC97FE16" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_3107A054A2118EEBD2B1502CBC97EEB2" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_F31301A458C324A0BD76502CBC97A33F" xlink:to="loc_us-gaap_AvailableForSaleSecurities_3107A054A2118EEBD2B1502CBC97EEB2" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensation" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_0908F77EEAE88B0393BD504087F04995" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_87C9445C3292246D40FC504087F03648" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_0908F77EEAE88B0393BD504087F04995" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_87C9445C3292246D40FC504087F03648" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensationAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureStockbasedCompensationAdditionalInformationAbstract" xlink:label="loc_algn_DisclosureStockbasedCompensationAdditionalInformationAbstract_C7C08F862BFE4BEA97CB18919BCE6C24" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BB9E0E6BC4AF93DC2BC318919BCE0648" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureStockbasedCompensationAdditionalInformationAbstract_C7C08F862BFE4BEA97CB18919BCE6C24" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BB9E0E6BC4AF93DC2BC318919BCE0648" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_32BCCC6C772AC2AC60FC18919BCE5A3B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BB9E0E6BC4AF93DC2BC318919BCE0648" xlink:to="loc_us-gaap_AwardTypeAxis_32BCCC6C772AC2AC60FC18919BCE5A3B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5291B2EA8045E3C977A618919BCFEFDE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_32BCCC6C772AC2AC60FC18919BCE5A3B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5291B2EA8045E3C977A618919BCFEFDE" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_EmployeeStockPurchasePlan2010Member" xlink:label="loc_algn_EmployeeStockPurchasePlan2010Member_B2003F714E98A994DB0218919BCF3825" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5291B2EA8045E3C977A618919BCFEFDE" xlink:to="loc_algn_EmployeeStockPurchasePlan2010Member_B2003F714E98A994DB0218919BCF3825" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_7C63130B076ECE176B0D18919BCFF6DB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5291B2EA8045E3C977A618919BCFEFDE" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_7C63130B076ECE176B0D18919BCFF6DB" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_MarketPerformanceBasedRestrictedStockUnitsMember" xlink:label="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_0621445025CD73DDCDC118919BCF69DC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5291B2EA8045E3C977A618919BCFEFDE" xlink:to="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_0621445025CD73DDCDC118919BCF69DC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_BD31CEAB22DE4CB901DF18919BCF8B7D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5291B2EA8045E3C977A618919BCFEFDE" xlink:to="loc_us-gaap_EmployeeStockOptionMember_BD31CEAB22DE4CB901DF18919BCF8B7D" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_EmployeeStockPurchasePlanMember" xlink:label="loc_algn_EmployeeStockPurchasePlanMember_3BB53F8008A0FB94571218919BCF90E9" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5291B2EA8045E3C977A618919BCFEFDE" xlink:to="loc_algn_EmployeeStockPurchasePlanMember_3BB53F8008A0FB94571218919BCF90E9" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis" xlink:label="loc_algn_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis_5F24F1AB8317DBE7DFA918919BCF49E1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BB9E0E6BC4AF93DC2BC318919BCE0648" xlink:to="loc_algn_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis_5F24F1AB8317DBE7DFA918919BCF49E1" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain" xlink:label="loc_algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain_0F78BB31D8D4FFBDE49F18919BCF61C7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAxis_5F24F1AB8317DBE7DFA918919BCF49E1" xlink:to="loc_algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain_0F78BB31D8D4FFBDE49F18919BCF61C7" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_StockIncentivePlan2005Member" xlink:label="loc_algn_StockIncentivePlan2005Member_84F7EFC80EA32D96A93C18919BCFA059" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain_0F78BB31D8D4FFBDE49F18919BCF61C7" xlink:to="loc_algn_StockIncentivePlan2005Member_84F7EFC80EA32D96A93C18919BCFA059" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_AmendedAndRestated2005StockIncentivePlanMember" xlink:label="loc_algn_AmendedAndRestated2005StockIncentivePlanMember_12165E116376987E052818919BCF1929" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDomain_0F78BB31D8D4FFBDE49F18919BCF61C7" xlink:to="loc_algn_AmendedAndRestated2005StockIncentivePlanMember_12165E116376987E052818919BCF1929" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_C077532A2DB5416759F318919BCFC9CC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BB9E0E6BC4AF93DC2BC318919BCE0648" xlink:to="loc_us-gaap_RangeAxis_C077532A2DB5416759F318919BCFC9CC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_AE63E457F3CDC88E7A5A18919BCFBED6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_C077532A2DB5416759F318919BCFC9CC" xlink:to="loc_us-gaap_RangeMember_AE63E457F3CDC88E7A5A18919BCFBED6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_A013BC6F14EF3804E22C18919BCF94A2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_AE63E457F3CDC88E7A5A18919BCFBED6" xlink:to="loc_us-gaap_MinimumMember_A013BC6F14EF3804E22C18919BCF94A2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_B1A8949DB4B916B2355118919BCFCD43" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_AE63E457F3CDC88E7A5A18919BCFBED6" xlink:to="loc_us-gaap_MaximumMember_B1A8949DB4B916B2355118919BCFCD43" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_06AE9CB31293BB18B93918919BCF1C7A" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BB9E0E6BC4AF93DC2BC318919BCE0648" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_06AE9CB31293BB18B93918919BCF1C7A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_1B6C984B43C45BC65EEB18919BCF19A7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_06AE9CB31293BB18B93918919BCF1C7A" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_1B6C984B43C45BC65EEB18919BCF19A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_92E19A9B6479B3B56C8218919BD07892" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_06AE9CB31293BB18B93918919BCF1C7A" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_92E19A9B6479B3B56C8218919BD07892" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_45BB8B6367A24DF2B6A018919BD042F4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_06AE9CB31293BB18B93918919BCF1C7A" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_45BB8B6367A24DF2B6A018919BD042F4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_461C937476C2C3274FC618919BD0F009" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_06AE9CB31293BB18B93918919BCF1C7A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_461C937476C2C3274FC618919BD0F009" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_PercentageOfMarketPerformanceBasedRestrictedStockUnitsDuringVestingPeriod" xlink:label="loc_algn_PercentageOfMarketPerformanceBasedRestrictedStockUnitsDuringVestingPeriod_E8DBE0E5EDFFF53C2C8618919BD052FD" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_06AE9CB31293BB18B93918919BCF1C7A" xlink:to="loc_algn_PercentageOfMarketPerformanceBasedRestrictedStockUnitsDuringVestingPeriod_E8DBE0E5EDFFF53C2C8618919BD052FD" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_EmployeeStockPurchasePlanNumberOfSharesAvailableForIssuance" xlink:label="loc_algn_EmployeeStockPurchasePlanNumberOfSharesAvailableForIssuance_6DD79918244CA997980618919BD0DB7E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_06AE9CB31293BB18B93918919BCF1C7A" xlink:to="loc_algn_EmployeeStockPurchasePlanNumberOfSharesAvailableForIssuance_6DD79918244CA997980618919BD0DB7E" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesRemainingAvailableForIssuance" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesRemainingAvailableForIssuance_6C2DCD58F20E06DE830018919BD00CD9" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_06AE9CB31293BB18B93918919BCF1C7A" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesRemainingAvailableForIssuance_6C2DCD58F20E06DE830018919BD00CD9" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureStockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesAbstract" xlink:label="loc_algn_DisclosureStockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesAbstract_EAA229DA1FAF21EA9FC1504087E2940F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_DBE66291E0E5FA6173B5504087E2F6F7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureStockBasedCompensationExpenseRelatedToAllStockBasedAwardsAndEmployeeStockPurchasesAbstract_EAA229DA1FAF21EA9FC1504087E2940F" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_DBE66291E0E5FA6173B5504087E2F6F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_E770149A14B67B588FCF504087E313B4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_DBE66291E0E5FA6173B5504087E2F6F7" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_E770149A14B67B588FCF504087E313B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_6AF21966B2BA705DABD4504087E39755" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_E770149A14B67B588FCF504087E313B4" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_6AF21966B2BA705DABD4504087E39755" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_6F973509EB79FAA32CF2504087E3D4DE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_6AF21966B2BA705DABD4504087E39755" xlink:to="loc_us-gaap_CostOfSalesMember_6F973509EB79FAA32CF2504087E3D4DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SellingAndMarketingExpenseMember" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_F371081CE9759B54EA02504087E39AB0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_6AF21966B2BA705DABD4504087E39755" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_F371081CE9759B54EA02504087E39AB0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_70747F3EE6F13CAFB615504087E3DEDB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_6AF21966B2BA705DABD4504087E39755" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_70747F3EE6F13CAFB615504087E3DEDB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_6F238290BA3F7D39B17D504087E32E20" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_6AF21966B2BA705DABD4504087E39755" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_6F238290BA3F7D39B17D504087E32E20" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_57BAD45D9587B8A7FBB0504087E33640" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_DBE66291E0E5FA6173B5504087E2F6F7" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_57BAD45D9587B8A7FBB0504087E33640" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_6D5E63BD9BEE8EB5A3B9504087E3FC9F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_57BAD45D9587B8A7FBB0504087E33640" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_6D5E63BD9BEE8EB5A3B9504087E3FC9F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensationStockBasedCompensationEmployeeStockPurchasePlanDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9A5DA4D92C0B36113BCE18919B2AD3DE" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_F0DF02E80AAABE0B469D18919B2A010D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9A5DA4D92C0B36113BCE18919B2AD3DE" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_F0DF02E80AAABE0B469D18919B2A010D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_DAC4CF8ECEE3CD323E2418919B2AABB0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9A5DA4D92C0B36113BCE18919B2AD3DE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_DAC4CF8ECEE3CD323E2418919B2AABB0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_4D6736F3C1D2341E254818919B2ABC07" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9A5DA4D92C0B36113BCE18919B2AD3DE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_4D6736F3C1D2341E254818919B2ABC07" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_87A3058BB48A92782F9A18919B2AE1B9" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9A5DA4D92C0B36113BCE18919B2AD3DE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_87A3058BB48A92782F9A18919B2AE1B9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_F1C5934E1CE6896D23ED18919B2A8D28" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9A5DA4D92C0B36113BCE18919B2AD3DE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_F1C5934E1CE6896D23ED18919B2A8D28" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/StockBasedCompensationTables" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_A37ADE01ADEA971521A218919A3FA03A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_547B0CFAE78ACA1D127518919A3F135F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_A37ADE01ADEA971521A218919A3FA03A" xlink:to="loc_us-gaap_StatementTable_547B0CFAE78ACA1D127518919A3F135F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_C7A620E1214E30B3EF2A18919A3F34B9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_547B0CFAE78ACA1D127518919A3F135F" xlink:to="loc_us-gaap_AwardTypeAxis_C7A620E1214E30B3EF2A18919A3F34B9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3C97DB7165AA14190CC218919A3F58DB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_C7A620E1214E30B3EF2A18919A3F34B9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3C97DB7165AA14190CC218919A3F58DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_34CA471335297C28B90B18919A3FEBDA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3C97DB7165AA14190CC218919A3F58DB" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_34CA471335297C28B90B18919A3FEBDA" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_MarketPerformanceBasedRestrictedStockUnitsMember" xlink:label="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_4F908128DEB39E74385618919A3F78F3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3C97DB7165AA14190CC218919A3F58DB" xlink:to="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_4F908128DEB39E74385618919A3F78F3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_9DF208E13E392929C43018919A3FE80A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_547B0CFAE78ACA1D127518919A3F135F" xlink:to="loc_us-gaap_StatementLineItems_9DF208E13E392929C43018919A3FE80A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_66D9782D27BCA86416A818919A3F311B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9DF208E13E392929C43018919A3FE80A" xlink:to="loc_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_66D9782D27BCA86416A818919A3F311B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_C821E3362454E0A36AA118919A40755D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9DF208E13E392929C43018919A3FE80A" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_C821E3362454E0A36AA118919A40755D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_5A21A7627EA29495BEA618919A40601E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9DF208E13E392929C43018919A3FE80A" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_5A21A7627EA29495BEA618919A40601E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock_6C0618675CA670CFA35018919A40491B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9DF208E13E392929C43018919A3FE80A" xlink:to="loc_us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock_6C0618675CA670CFA35018919A40491B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_603CD808061D387C4F7E18919A40E77D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9DF208E13E392929C43018919A3FE80A" xlink:to="loc_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_603CD808061D387C4F7E18919A40E77D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisAbstract" xlink:label="loc_algn_DisclosureSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisAbstract_8D4E9174427BDADF3624525C36B9B41B" xlink:type="locator" />
    <loc xlink:href="algn-20140930.xsd#algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable" xlink:label="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_5DC1ED66FA3231752018525C36BA00CC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisAbstract_8D4E9174427BDADF3624525C36B9B41B" xlink:to="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_5DC1ED66FA3231752018525C36BA00CC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_D29B1BF340178EAAF5DA525C36BA5D88" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_5DC1ED66FA3231752018525C36BA00CC" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_D29B1BF340178EAAF5DA525C36BA5D88" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_4F6EEECE573E3D7D9785525C36BA6BFA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_D29B1BF340178EAAF5DA525C36BA5D88" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_4F6EEECE573E3D7D9785525C36BA6BFA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_5A593EA53C7E1ACA0692525C36BBFABB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_4F6EEECE573E3D7D9785525C36BA6BFA" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_5A593EA53C7E1ACA0692525C36BBFABB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_CE80B1D304BEC0467CBB525C36BBDADC" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_5DC1ED66FA3231752018525C36BA00CC" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_CE80B1D304BEC0467CBB525C36BBDADC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9563E65347A291F1AFBE525C36BB65DF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_CE80B1D304BEC0467CBB525C36BBDADC" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9563E65347A291F1AFBE525C36BB65DF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_8AFE876083BED8C9D136525C36BB525F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9563E65347A291F1AFBE525C36BB65DF" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_8AFE876083BED8C9D136525C36BB525F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_98A1C94C92F2F77579B2525C36BB8106" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9563E65347A291F1AFBE525C36BB65DF" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_98A1C94C92F2F77579B2525C36BB8106" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis" xlink:label="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_EC8BCF810BF8CD9882E8525C36BB9486" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_5DC1ED66FA3231752018525C36BA00CC" xlink:to="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_EC8BCF810BF8CD9882E8525C36BB9486" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain" xlink:label="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_052C3D5C981BC1C52935525C36BBC6F6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis_EC8BCF810BF8CD9882E8525C36BB9486" xlink:to="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_052C3D5C981BC1C52935525C36BBC6F6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashEquivalentsMember" xlink:label="loc_us-gaap_CashEquivalentsMember_41A2C7965B349425799C525C36BBEC55" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_052C3D5C981BC1C52935525C36BBC6F6" xlink:to="loc_us-gaap_CashEquivalentsMember_41A2C7965B349425799C525C36BBEC55" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_9DD43388CD89C0CCBA87525C36BBDDFB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_052C3D5C981BC1C52935525C36BBC6F6" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_9DD43388CD89C0CCBA87525C36BBDDFB" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_LongTermInvestmentsMember" xlink:label="loc_algn_LongTermInvestmentsMember_EF782FB97BEFD3779A9F525C36BBEB83" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentCategoryDomain_052C3D5C981BC1C52935525C36BBC6F6" xlink:to="loc_algn_LongTermInvestmentsMember_EF782FB97BEFD3779A9F525C36BBEB83" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_553973451708D92F04B5525C36BB0C76" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_5DC1ED66FA3231752018525C36BA00CC" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_553973451708D92F04B5525C36BB0C76" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_F08580DF395F7024E0E6525C36BB25E1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_553973451708D92F04B5525C36BB0C76" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_F08580DF395F7024E0E6525C36BB25E1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_1E4B895E805CCDA71D29525C36C11E45" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_F08580DF395F7024E0E6525C36BB25E1" xlink:to="loc_us-gaap_MoneyMarketFundsMember_1E4B895E805CCDA71D29525C36C11E45" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_78716DDAD9662497B0AC525C36C17E90" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_F08580DF395F7024E0E6525C36BB25E1" xlink:to="loc_us-gaap_CommercialPaperMember_78716DDAD9662497B0AC525C36C17E90" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ForeignCorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_1A6FE6654E68A9FEBE09525C36C1CB3C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_F08580DF395F7024E0E6525C36BB25E1" xlink:to="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_1A6FE6654E68A9FEBE09525C36C1CB3C" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_USGovernmentAgencyBondsMember" xlink:label="loc_algn_USGovernmentAgencyBondsMember_D5C9E47EB549CB0FA532525C36C127EA" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_F08580DF395F7024E0E6525C36BB25E1" xlink:to="loc_algn_USGovernmentAgencyBondsMember_D5C9E47EB549CB0FA532525C36C127EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_45590F5AEF9F8E34C7D2525C36C1BB59" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_5DC1ED66FA3231752018525C36BA00CC" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_45590F5AEF9F8E34C7D2525C36C1BB59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_45590F5AEF9F8E34C7D2525C36C1BB59" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:type="arc" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_us-gaap_CommercialPaperMember_78716DDAD9662497B0AC525C36C17E90" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CorporateBondSecuritiesMember" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_6E0FF08C51FFA405B845525C36C1AC58" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_6E0FF08C51FFA405B845525C36C1AC58" xlink:type="arc" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_us-gaap_ForeignCorporateDebtSecuritiesMember_1A6FE6654E68A9FEBE09525C36C1CB3C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AgencySecuritiesMember" xlink:label="loc_us-gaap_AgencySecuritiesMember_6D177471333B829FC541525C36C18CEA" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_us-gaap_AgencySecuritiesMember_6D177471333B829FC541525C36C18CEA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_16557376A53190F2AFBE525C36C16A78" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_16557376A53190F2AFBE525C36C16A78" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_5C6713B52A6A9F524E11525C36C184CD" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_5C6713B52A6A9F524E11525C36C184CD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_7CC10CAA04F87E7F40EA525C36C25727" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_us-gaap_CertificatesOfDepositMember_7CC10CAA04F87E7F40EA525C36C25727" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_MunicipalSecuritiesMember" xlink:label="loc_algn_MunicipalSecuritiesMember_BD8F42684D92B5B9BB83525C36C216BB" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_algn_MunicipalSecuritiesMember_BD8F42684D92B5B9BB83525C36C216BB" xlink:type="arc" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_algn_USGovernmentAgencyBondsMember_D5C9E47EB549CB0FA532525C36C127EA" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_IsraeliSeveranceFundsMember" xlink:label="loc_algn_IsraeliSeveranceFundsMember_407300AD3FA60D4C945E525C36C2BAD8" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_algn_IsraeliSeveranceFundsMember_407300AD3FA60D4C945E525C36C2BAD8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_38BE6D8CA8F1B4D6D1E1525C36C2CE2F" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_419CBC88A55A25AAA3D5525C36C132B8" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_38BE6D8CA8F1B4D6D1E1525C36C2CE2F" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems" xlink:label="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_220455EA18960C77D6EC525C36C20F9D" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_5DC1ED66FA3231752018525C36BA00CC" xlink:to="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_220455EA18960C77D6EC525C36C20F9D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_1B9A52AFB44542F97639525C36C29A21" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_220455EA18960C77D6EC525C36C20F9D" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_1B9A52AFB44542F97639525C36C29A21" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_03A6938EB7A596BAA09E525C36C20FB1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_220455EA18960C77D6EC525C36C20F9D" xlink:to="loc_us-gaap_AvailableForSaleSecurities_03A6938EB7A596BAA09E525C36C20FB1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAssetsFairValueDisclosure" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_C0379ADC7BFC857037E6525C36C25EDB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_220455EA18960C77D6EC525C36C20F9D" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_C0379ADC7BFC857037E6525C36C25EDB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_7FF9CA8D83757211E6FE525C36C253F4" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_220455EA18960C77D6EC525C36C20F9D" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_7FF9CA8D83757211E6FE525C36C253F4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfMsuPerformanceDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureSummaryOfMSUPerformanceAbstract" xlink:label="loc_algn_DisclosureSummaryOfMSUPerformanceAbstract_CB1C0DB15A911F79DF40504087D3C243" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BC8AAF4804B85617DAC0504087D32848" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSummaryOfMSUPerformanceAbstract_CB1C0DB15A911F79DF40504087D3C243" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BC8AAF4804B85617DAC0504087D32848" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_4842679FB89B5EEDACB3504087D386A0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BC8AAF4804B85617DAC0504087D32848" xlink:to="loc_dei_LegalEntityAxis_4842679FB89B5EEDACB3504087D386A0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_4529EF1FF81DEA952A75504087D3EA40" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_4842679FB89B5EEDACB3504087D386A0" xlink:to="loc_dei_EntityDomain_4529EF1FF81DEA952A75504087D3EA40" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_5ECBF8D442DB052ABF8F504087D3CAD2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BC8AAF4804B85617DAC0504087D32848" xlink:to="loc_us-gaap_AwardTypeAxis_5ECBF8D442DB052ABF8F504087D3CAD2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_520CC73D7BC49030A792504087D31179" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_5ECBF8D442DB052ABF8F504087D3CAD2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_520CC73D7BC49030A792504087D31179" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_MarketPerformanceBasedRestrictedStockUnitsMember" xlink:label="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_C4F221FE975C295AB95C504087D3FEFA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_520CC73D7BC49030A792504087D31179" xlink:to="loc_algn_MarketPerformanceBasedRestrictedStockUnitsMember_C4F221FE975C295AB95C504087D3FEFA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DEE5C91F3CE1D284032E504087D3C32E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_BC8AAF4804B85617DAC0504087D32848" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DEE5C91F3CE1D284032E504087D3C32E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_28CC4678B508911454B9504087D4A958" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DEE5C91F3CE1D284032E504087D3C32E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_28CC4678B508911454B9504087D4A958" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_8DADB6C9062762D88A23504087D44D29" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_28CC4678B508911454B9504087D4A958" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_8DADB6C9062762D88A23504087D44D29" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_1496B03CFC7587CF2345504087D4270E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_28CC4678B508911454B9504087D4A958" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_1496B03CFC7587CF2345504087D4270E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_E400F6E80C9865FC307B504087D428F0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_28CC4678B508911454B9504087D4A958" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_E400F6E80C9865FC307B504087D428F0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_647B19864D8E5C0F593A504087D401BA" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_28CC4678B508911454B9504087D4A958" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_647B19864D8E5C0F593A504087D401BA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_CA8A3ADE6E2217E2A5DD504087D40B74" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_28CC4678B508911454B9504087D4A958" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_CA8A3ADE6E2217E2A5DD504087D40B74" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_D7060B1C2CE065C2A400504FC4325EF4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DEE5C91F3CE1D284032E504087D3C32E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_D7060B1C2CE065C2A400504FC4325EF4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_14B909317D39221DC4F0505176E2AD46" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_D7060B1C2CE065C2A400504FC4325EF4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_14B909317D39221DC4F0505176E2AD46" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_952B8A53393B39B7F61D505176F1DBE0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_D7060B1C2CE065C2A400504FC4325EF4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_952B8A53393B39B7F61D505176F1DBE0" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue_0EB3B7DA71818831F55650517700E5D0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_D7060B1C2CE065C2A400504FC4325EF4" xlink:to="loc_algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue_0EB3B7DA71818831F55650517700E5D0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_45EADFEE6F05A9911DCE5051770E30D1" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_D7060B1C2CE065C2A400504FC4325EF4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_45EADFEE6F05A9911DCE5051770E30D1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_CD4E784CA123F4254D2A50529EE5E766" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_D7060B1C2CE065C2A400504FC4325EF4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_CD4E784CA123F4254D2A50529EE5E766" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_8E538386E8C0120552E1504087D4E227" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DEE5C91F3CE1D284032E504087D3C32E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_8E538386E8C0120552E1504087D4E227" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1_2CDEEC44CABF48B5718A504087D4F318" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_8E538386E8C0120552E1504087D4E227" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1_2CDEEC44CABF48B5718A504087D4F318" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_43CC0C0D2BCD69E5606C504087D4A5A8" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_DEE5C91F3CE1D284032E504087D3C32E" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_43CC0C0D2BCD69E5606C504087D4A5A8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_877147A2E2D3B574D0AD504087D4B73C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_43CC0C0D2BCD69E5606C504087D4A5A8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_877147A2E2D3B574D0AD504087D4B73C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfNonvestedSharesDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureSummaryOfNonvestedSharesAbstract" xlink:label="loc_algn_DisclosureSummaryOfNonvestedSharesAbstract_8CA1CADFB765DA548EF9504087D89BE7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0C0164EF107466323436504087D80CFD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureSummaryOfNonvestedSharesAbstract_8CA1CADFB765DA548EF9504087D89BE7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0C0164EF107466323436504087D80CFD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_6F5E4CE72CAF110979D9504087D8B973" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0C0164EF107466323436504087D80CFD" xlink:to="loc_dei_LegalEntityAxis_6F5E4CE72CAF110979D9504087D8B973" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_03CBAF5D8B321B9C8557504087D84938" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_6F5E4CE72CAF110979D9504087D8B973" xlink:to="loc_dei_EntityDomain_03CBAF5D8B321B9C8557504087D84938" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_A9EAB81BB5B1B4D6055A504087D8CECF" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0C0164EF107466323436504087D80CFD" xlink:to="loc_us-gaap_AwardTypeAxis_A9EAB81BB5B1B4D6055A504087D8CECF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F2031AEDCA2F497AC706504087D8F675" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_A9EAB81BB5B1B4D6055A504087D8CECF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F2031AEDCA2F497AC706504087D8F675" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_8EE9CD01CB44695A06E6504087D86DFB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F2031AEDCA2F497AC706504087D8F675" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_8EE9CD01CB44695A06E6504087D86DFB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EE9EE7791F47DB51CEE7504087D82BA2" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0C0164EF107466323436504087D80CFD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EE9EE7791F47DB51CEE7504087D82BA2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_EEE23658F3C4A7E34557504087D8572D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EE9EE7791F47DB51CEE7504087D82BA2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_EEE23658F3C4A7E34557504087D8572D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_1DD5EBD48D24B634D857504087D8A73E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_EEE23658F3C4A7E34557504087D8572D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_1DD5EBD48D24B634D857504087D8A73E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_9A83E71D88121DF0F5F8504087D8FC06" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_EEE23658F3C4A7E34557504087D8572D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_9A83E71D88121DF0F5F8504087D8FC06" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_52C03160E62AC7D2F66B504087D84F9E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_EEE23658F3C4A7E34557504087D8572D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_52C03160E62AC7D2F66B504087D84F9E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_DA0FF12D4EB4116D6CAF504087D92C12" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_EEE23658F3C4A7E34557504087D8572D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_DA0FF12D4EB4116D6CAF504087D92C12" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_A34BEAE6F983BBD07758504087D9D28A" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_EEE23658F3C4A7E34557504087D8572D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_A34BEAE6F983BBD07758504087D9D28A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_0420EDCA40505BDBBACA504B4A4B3783" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EE9EE7791F47DB51CEE7504087D82BA2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_0420EDCA40505BDBBACA504B4A4B3783" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_98C6B02F22774AD30A50504A8656C9AE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_0420EDCA40505BDBBACA504B4A4B3783" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_98C6B02F22774AD30A50504A8656C9AE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4FAE7072BB1D6C287C7B504C3209E8F4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_0420EDCA40505BDBBACA504B4A4B3783" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4FAE7072BB1D6C287C7B504C3209E8F4" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue_560958F84FF05297BB6D504C7C3B51E5" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_0420EDCA40505BDBBACA504B4A4B3783" xlink:to="loc_algn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndReleasedInPeriodWeightedAverageGrantDateFairValue_560958F84FF05297BB6D504C7C3B51E5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1586B919E6A861AD1D91504D7B408775" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_0420EDCA40505BDBBACA504B4A4B3783" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1586B919E6A861AD1D91504D7B408775" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_47DC914743FF8B6E91D3504E7C6E7BBF" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_0420EDCA40505BDBBACA504B4A4B3783" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_47DC914743FF8B6E91D3504E7C6E7BBF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_C920D53FD19541329077504087D9CA91" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EE9EE7791F47DB51CEE7504087D82BA2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_C920D53FD19541329077504087D9CA91" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1_514B34FCCC1B416A9E04504087D93F77" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_C920D53FD19541329077504087D9CA91" xlink:to="loc_algn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerm1_514B34FCCC1B416A9E04504087D93F77" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_539176CB5220BA76D22E504087D90163" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_EE9EE7791F47DB51CEE7504087D82BA2" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_539176CB5220BA76D22E504087D90163" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_A0E803EC8EECB26EB42E504087D9939E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_539176CB5220BA76D22E504087D90163" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_A0E803EC8EECB26EB42E504087D9939E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_9E230CC3BD1881148F3BCCF5BA8A34C0" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_5EB901404AF5E3C0C781CCF5BA8A4485" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_9E230CC3BD1881148F3BCCF5BA8A34C0" xlink:to="loc_us-gaap_SignificantAccountingPoliciesTextBlock_5EB901404AF5E3C0C781CCF5BA8A4485" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_NotesToFinancialStatementsAbstract" xlink:label="loc_algn_NotesToFinancialStatementsAbstract_7657330B07025AC9DBA6CCF5BA8897C5" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_6070572C9431A5294EF8CCF5BA88E15C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_7657330B07025AC9DBA6CCF5BA8897C5" xlink:to="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_6070572C9431A5294EF8CCF5BA88E15C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates_1D2DA7B56337BE9C8B51CCF5BA881DBB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_7657330B07025AC9DBA6CCF5BA8897C5" xlink:to="loc_us-gaap_UseOfEstimates_1D2DA7B56337BE9C8B51CCF5BA881DBB" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_RecentAccountingPronouncementsPolicyTextBlock" xlink:label="loc_algn_RecentAccountingPronouncementsPolicyTextBlock_4E002D90D7EDC742B0EDCCF5BA88B342" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_NotesToFinancialStatementsAbstract_7657330B07025AC9DBA6CCF5BA8897C5" xlink:to="loc_algn_RecentAccountingPronouncementsPolicyTextBlock_4E002D90D7EDC742B0EDCCF5BA88B342" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/TotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract" xlink:label="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_72694DE421659B9EBBDFCCF5BA32A129" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_0E4199DEC7F0812E41CECCF5BA32A81D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_72694DE421659B9EBBDFCCF5BA32A129" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_0E4199DEC7F0812E41CECCF5BA32A81D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_0B7A06DD05827858B89ACCF5BA33C5C3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_72694DE421659B9EBBDFCCF5BA32A129" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_0B7A06DD05827858B89ACCF5BA33C5C3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_39923B7299656698F08DCCF5BA33D293" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_72694DE421659B9EBBDFCCF5BA32A129" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_39923B7299656698F08DCCF5BA33D293" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_A2BCB13E08ECEA5CEC44CCF5BA33F51E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_72694DE421659B9EBBDFCCF5BA32A129" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_A2BCB13E08ECEA5CEC44CCF5BA33F51E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_8BF86288A4FDD34BF6EFCCF5BA33A5E7" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_72694DE421659B9EBBDFCCF5BA32A129" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_8BF86288A4FDD34BF6EFCCF5BA33A5E7" xlink:type="arc" />
    <loc xlink:href="algn-20140930.xsd#algn_FutureAmortizationExpenseThereafter" xlink:label="loc_algn_FutureAmortizationExpenseThereafter_EE8EA922766AA5323693CCF5BA33524A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_72694DE421659B9EBBDFCCF5BA32A129" xlink:to="loc_algn_FutureAmortizationExpenseThereafter_EE8EA922766AA5323693CCF5BA33524A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_327A3437313A1C1AB78DCCF5BA330F8B" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureTotalEstimatedAnnualFutureAmortizationExpenseForAcquiredIntangibleAssetsAbstract_72694DE421659B9EBBDFCCF5BA32A129" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_327A3437313A1C1AB78DCCF5BA330F8B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.aligntech.com/role/WarrantyAccrualActivityDetails" xlink:type="extended">
    <loc xlink:href="algn-20140930.xsd#algn_DisclosureWarrantyAccrualActivityAbstract" xlink:label="loc_algn_DisclosureWarrantyAccrualActivityAbstract_16C5C6C7F4253B48BAC043D183C8D1FA" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MovementInStandardProductWarrantyAccrualRollForward" xlink:label="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_CD072623666D86D62EFA43D183C82DE9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_algn_DisclosureWarrantyAccrualActivityAbstract_16C5C6C7F4253B48BAC043D183C8D1FA" xlink:to="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_CD072623666D86D62EFA43D183C82DE9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StandardProductWarrantyAccrual" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_0288C23E5B0B0A79C26B43D183C87DC3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_CD072623666D86D62EFA43D183C82DE9" xlink:to="loc_us-gaap_StandardProductWarrantyAccrual_0288C23E5B0B0A79C26B43D183C87DC3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StandardProductWarrantyAccrualWarrantiesIssued" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_F3E5BB3A3522300AC0AF43D183C86D17" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_CD072623666D86D62EFA43D183C82DE9" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_F3E5BB3A3522300AC0AF43D183C86D17" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StandardProductWarrantyAccrualPayments" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualPayments_075CEBA42DC5F6FCAB4B43D183C815A6" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_CD072623666D86D62EFA43D183C82DE9" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualPayments_075CEBA42DC5F6FCAB4B43D183C815A6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StandardProductWarrantyAccrual" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_07DF26ECB9B18B71D0C543D183C812EF" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_CD072623666D86D62EFA43D183C82DE9" xlink:to="loc_us-gaap_StandardProductWarrantyAccrual_07DF26ECB9B18B71D0C543D183C812EF" xlink:type="arc" />
  </presentationLink>
</linkbase>





