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  <xsd:element abstract="true" id="cdw_FinancialInstrumentsAbstract" name="FinancialInstrumentsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_InterestRateCapAgreementEffectiveDecember312018ThroughDecember312020Member" name="InterestRateCapAgreementEffectiveDecember312018ThroughDecember312020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_InterestRateCapAgreementEffectiveDecember312020ThroughDecember312022Member" name="InterestRateCapAgreementEffectiveDecember312020ThroughDecember312022Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_InventoryFinancingAgreementsAbstract" name="InventoryFinancingAgreementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_InventoryFinancingAgreementsAxis" name="InventoryFinancingAgreementsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_InventoryFinancingAgreementsDomain" name="InventoryFinancingAgreementsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_InventoryFinancingAgreementsLineItems" name="InventoryFinancingAgreementsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_InventoryFinancingAgreementsTable" name="InventoryFinancingAgreementsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cdw_InventoryFinancingAgreementsTableTextBlock" name="InventoryFinancingAgreementsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="cdw_InventoryFinancingAgreementsTextblock" name="InventoryFinancingAgreementsTextblock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="cdw_LineOfCreditFacilityBorrowingBase" name="LineOfCreditFacilityBorrowingBase" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cdw_LongtermDebtCurrentMaturitiesGross" name="LongtermDebtCurrentMaturitiesGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cdw_LongtermDebtExcludingCurrentMaturitiesNetofDeferredFinancingCostsDiscountorPremium" name="LongtermDebtExcludingCurrentMaturitiesNetofDeferredFinancingCostsDiscountorPremium" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cdw_NetChangeInAccountsPayableInventoryFinancing" name="NetChangeInAccountsPayableInventoryFinancing" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_NetcommProductsMember" name="NetcommProductsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_NotebooksMobileDevicesMember" name="NotebooksMobileDevicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cdw_NumberofOperatingSegmentsReportableUnitQuantitativeThresholdNotMet" name="NumberofOperatingSegmentsReportableUnitQuantitativeThresholdNotMet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="cdw_NumberofOwnedSubsidiaries" name="NumberofOwnedSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cdw_OtherHardwareMember" name="OtherHardwareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cdw_OtherInventoryFinancingAgreements" name="OtherInventoryFinancingAgreements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cdw_OtherProductsAndServicesMember" name="OtherProductsAndServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_OtherlongtermobligationsDomain" name="OtherlongtermobligationsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_PublicSegmentGovernmentAgenciesEducationandHealthcareMember" name="PublicSegmentGovernmentAgenciesEducationandHealthcareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cdw_RevenuenetbyProductandServicePercentage" name="RevenuenetbyProductandServicePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="cdw_RevolvingLoanFinancingAgreement" name="RevolvingLoanFinancingAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cdw_SalesChannelCorporateMember" name="SalesChannelCorporateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SalesChannelEducationMember" name="SalesChannelEducationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SalesChannelGovernmentMember" name="SalesChannelGovernmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SalesChannelHealthcareMember" name="SalesChannelHealthcareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SalesChannelOtherMember" name="SalesChannelOtherMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SalesChannelSmallBusinessMember" name="SalesChannelSmallBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cdw_SegmentReportingCustomerSegmentsCustomerEmployeeHeadcount" name="SegmentReportingCustomerSegmentsCustomerEmployeeHeadcount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cdw_SeniorNotesFourPointOneTwoFiveDue2025Member" name="SeniorNotesFourPointOneTwoFiveDue2025Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SeniorNotesdue2024Member" name="SeniorNotesdue2024Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SeniorNotesdue2025Member" name="SeniorNotesdue2025Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SeniorNotesdue2028Member" name="SeniorNotesdue2028Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SeniorSecuredAssetBasedRevolvingCreditFacilityMember" name="SeniorSecuredAssetBasedRevolvingCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SeniorSecuredTermLoanFacilityMember" name="SeniorSecuredTermLoanFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_ServicesMember" name="ServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SmallBusinessMember" name="SmallBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_SoftwareProductsMember" name="SoftwareProductsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_TermLoanMember" name="TermLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_TotalHardwareMember" name="TotalHardwareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_TransferredAtPointInTimeAgentMember" name="TransferredAtPointInTimeAgentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_TransferredAtPointInTimePrincipalMember" name="TransferredAtPointInTimePrincipalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_TransferredOverTimePrincipalMember" name="TransferredOverTimePrincipalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_UnsecuredSeniorNotesMember" name="UnsecuredSeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cdw_VideoMember" name="VideoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
