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  <xs:element id="cdw_NumberofOperatingSegmentsReportableUnitQuantitativeThresholdNotMet" abstract="false" name="NumberofOperatingSegmentsReportableUnitQuantitativeThresholdNotMet" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cdw_NetcommProductsMember" abstract="true" name="NetcommProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_DescriptionofBusinessPolicyTextBlock" abstract="false" name="DescriptionofBusinessPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cdw_OtherInventoryFinancingAgreements" abstract="false" name="OtherInventoryFinancingAgreements" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_RevolvingLoanMember" abstract="true" name="RevolvingLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SmallBusinessMember" abstract="true" name="SmallBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_NetChangeInAccountsPayableInventoryFinancing" abstract="false" name="NetChangeInAccountsPayableInventoryFinancing" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_AccountsPayableInventoryFinancing" abstract="false" name="AccountsPayableInventoryFinancing" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_InventoryFinancingAgreementsDomain" abstract="true" name="InventoryFinancingAgreementsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_TransferredAtPointInTimePrincipalMember" abstract="true" name="TransferredAtPointInTimePrincipalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_InventoryFinancingAgreementsAxis" abstract="true" name="InventoryFinancingAgreementsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cdw_SalesChannelSmallBusinessMember" abstract="true" name="SalesChannelSmallBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_NumberofOwnedSubsidiaries" abstract="false" name="NumberofOwnedSubsidiaries" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cdw_TermLoanMember" abstract="true" name="TermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_InventoryFinancingAgreementsLineItems" abstract="true" name="InventoryFinancingAgreementsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cdw_SeniorSecuredTermLoanFacilityMember" abstract="true" name="SeniorSecuredTermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_ServicesMember" abstract="true" name="ServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SegmentReportingCustomerSegmentsCustomerEmployeeHeadcount" abstract="false" name="SegmentReportingCustomerSegmentsCustomerEmployeeHeadcount" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cdw_EnterpriseAndDataStorageIncludingDrivesMember" abstract="true" name="EnterpriseAndDataStorageIncludingDrivesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_InventoryFinancingAgreementsTextBlock" abstract="false" name="InventoryFinancingAgreementsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cdw_SeniorSecuredAssetBasedRevolvingCreditFacilityMember" abstract="true" name="SeniorSecuredAssetBasedRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_InventoryFinancingAgreementsTableTextBlock" abstract="false" name="InventoryFinancingAgreementsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cdw_LongtermDebtCurrentMaturitiesGross" abstract="false" name="LongtermDebtCurrentMaturitiesGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_AmountOwedUnderRevolvingLoanFinancingAgreement" abstract="false" name="AmountOwedUnderRevolvingLoanFinancingAgreement" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_TransferredOverTimePrincipalMember" abstract="true" name="TransferredOverTimePrincipalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_TotalHardwareMember" abstract="true" name="TotalHardwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_PublicSegmentGovernmentAgenciesEducationandHealthcareMember" abstract="true" name="PublicSegmentGovernmentAgenciesEducationandHealthcareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_OtherHardwareMember" abstract="true" name="OtherHardwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_TransferredAtPointInTimeAgentMember" abstract="true" name="TransferredAtPointInTimeAgentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SoftwareProductsMember" abstract="true" name="SoftwareProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_OtherAcquisitionMember" abstract="true" name="OtherAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_RevolvingLoanFinancingAgreement" abstract="false" name="RevolvingLoanFinancingAgreement" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_LineOfCreditFacilityBorrowingBase" abstract="false" name="LineOfCreditFacilityBorrowingBase" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cdw_SeniorNotesdue2024Member" abstract="true" name="SeniorNotesdue2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_AccountsPayableInventoryFinancingMember" abstract="true" name="AccountsPayableInventoryFinancingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_PublicMember" abstract="true" name="PublicMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SalesChannelOtherMember" abstract="true" name="SalesChannelOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_SalesChannelCorporateMember" abstract="true" name="SalesChannelCorporateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_CDWUKTermLoanMember" abstract="true" name="CDWUKTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_InventoryFinancingAgreementsAbstract" abstract="true" name="InventoryFinancingAgreementsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cdw_NotebooksMobileDevicesMember" abstract="true" name="NotebooksMobileDevicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_CDWUKRevolvingCreditFacilityMember" abstract="true" name="CDWUKRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_VideoMember" abstract="true" name="VideoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cdw_AmplifiedITLLCMember" abstract="true" name="AmplifiedITLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
