<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e3c1e-242b-70b2-8138-2662973b7d89,g:c291727d-a507-4d6c-8626-c3e3d08a7115-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:nsit="http://www.insight.com/20260630" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.insight.com/20260630">
  <xs:import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2026" schemaLocation="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="nsit-20260630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="nsit-20260630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="nsit-20260630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="nsit-20260630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://www.insight.com/role/CoverPage">
        <link:definition>0000001 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDBALANCESHEETS" roleURI="http://www.insight.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS">
        <link:definition>9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" roleURI="http://www.insight.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical">
        <link:definition>9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" roleURI="http://www.insight.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS">
        <link:definition>9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" roleURI="http://www.insight.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME">
        <link:definition>9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" roleURI="http://www.insight.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY">
        <link:definition>9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS&#8217; EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" roleURI="http://www.insight.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandRecentlyIssuedAccountingStandards" roleURI="http://www.insight.com/role/BasisofPresentationandRecentlyIssuedAccountingStandards">
        <link:definition>9952157 - Disclosure - Basis of Presentation and Recently Issued Accounting Standards</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesContractAssetsContractLiabilitiesandPerformanceObligations" roleURI="http://www.insight.com/role/ReceivablesContractAssetsContractLiabilitiesandPerformanceObligations">
        <link:definition>9952158 - Disclosure - Receivables, Contract Assets, Contract Liabilities and Performance Obligations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AssetsHeldforSale" roleURI="http://www.insight.com/role/AssetsHeldforSale">
        <link:definition>9952159 - Disclosure - Assets Held for Sale</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetEarningsPerShare" roleURI="http://www.insight.com/role/NetEarningsPerShare">
        <link:definition>9952160 - Disclosure - Net Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligations" roleURI="http://www.insight.com/role/DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligations">
        <link:definition>9952161 - Disclosure - Debt, Inventory Financing Facilities, Finance Leases and Other Financing Obligations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.insight.com/role/IncomeTaxes">
        <link:definition>9952162 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareRepurchaseProgram" roleURI="http://www.insight.com/role/ShareRepurchaseProgram">
        <link:definition>9952163 - Disclosure - Share Repurchase Program</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://www.insight.com/role/CommitmentsandContingencies">
        <link:definition>9952164 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformation" roleURI="http://www.insight.com/role/SegmentInformation">
        <link:definition>9952165 - Disclosure - Segment Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Acquisition" roleURI="http://www.insight.com/role/Acquisition">
        <link:definition>9952166 - Disclosure - Acquisition</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstruments" roleURI="http://www.insight.com/role/DerivativeFinancialInstruments">
        <link:definition>9952167 - Disclosure - Derivative Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEvent" roleURI="http://www.insight.com/role/SubsequentEvent">
        <link:definition>9952168 - Disclosure - Subsequent Event</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandRecentlyIssuedAccountingStandardsPolicies" roleURI="http://www.insight.com/role/BasisofPresentationandRecentlyIssuedAccountingStandardsPolicies">
        <link:definition>9955511 - Disclosure - Basis of Presentation and Recently Issued Accounting Standards (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandRecentlyIssuedAccountingStandardsTables" roleURI="http://www.insight.com/role/BasisofPresentationandRecentlyIssuedAccountingStandardsTables">
        <link:definition>9955512 - Disclosure - Basis of Presentation and Recently Issued Accounting Standards (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsTables" roleURI="http://www.insight.com/role/ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsTables">
        <link:definition>9955513 - Disclosure - Receivables, Contract Assets, Contract Liabilities and Performance Obligations (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetEarningsPerShareTables" roleURI="http://www.insight.com/role/NetEarningsPerShareTables">
        <link:definition>9955514 - Disclosure - Net Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsTables" roleURI="http://www.insight.com/role/DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsTables">
        <link:definition>9955515 - Disclosure - Debt, Inventory Financing Facilities, Finance Leases and Other Financing Obligations (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationTables" roleURI="http://www.insight.com/role/SegmentInformationTables">
        <link:definition>9955516 - Disclosure - Segment Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandRecentlyIssuedAccountingStandardsDetails" roleURI="http://www.insight.com/role/BasisofPresentationandRecentlyIssuedAccountingStandardsDetails">
        <link:definition>9955517 - Disclosure - Basis of Presentation and Recently Issued Accounting Standards (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofInformationaboutReceivablesandContractAssetandLiabilitiesDetails" roleURI="http://www.insight.com/role/ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofInformationaboutReceivablesandContractAssetandLiabilitiesDetails">
        <link:definition>9955518 - Disclosure - Receivables, Contract Assets, Contract Liabilities and Performance Obligations - Summary of Information about Receivables and Contract Asset and Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofInformationaboutReceivablesandContractAssetandLiabilitiesDetails_1" roleURI="http://www.insight.com/role/ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofInformationaboutReceivablesandContractAssetandLiabilitiesDetails_1">
        <link:definition>9955518 - Disclosure - Receivables, Contract Assets, Contract Liabilities and Performance Obligations - Summary of Information about Receivables and Contract Asset and Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofChangesinGrossContractLiabilitiesfromContractwithCustomersDetails" roleURI="http://www.insight.com/role/ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofChangesinGrossContractLiabilitiesfromContractwithCustomersDetails">
        <link:definition>9955519 - Disclosure - Receivables, Contract Assets, Contract Liabilities and Performance Obligations - Summary of Changes in Gross Contract Liabilities from Contract with Customers (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsAdditionalInformationDetails" roleURI="http://www.insight.com/role/ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsAdditionalInformationDetails">
        <link:definition>9955520 - Disclosure - Receivables, Contract Assets, Contract Liabilities and Performance Obligations - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofGrossContractAssetsbyInternalRiskRatingsDetails" roleURI="http://www.insight.com/role/ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofGrossContractAssetsbyInternalRiskRatingsDetails">
        <link:definition>9955521 - Disclosure - Receivables, Contract Assets, Contract Liabilities and Performance Obligations - Summary of Gross Contract Assets by Internal Risk Ratings (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofEstimatedNetSalesRelatedtoPerformanceObligationDetails" roleURI="http://www.insight.com/role/ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofEstimatedNetSalesRelatedtoPerformanceObligationDetails">
        <link:definition>9955522 - Disclosure - Receivables, Contract Assets, Contract Liabilities and Performance Obligations - Summary of Estimated Net Sales Related to Performance Obligation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofEstimatedNetSalesRelatedtoPerformanceObligationDetails_1" roleURI="http://www.insight.com/role/ReceivablesContractAssetsContractLiabilitiesandPerformanceObligationsSummaryofEstimatedNetSalesRelatedtoPerformanceObligationDetails_1">
        <link:definition>9955522 - Disclosure - Receivables, Contract Assets, Contract Liabilities and Performance Obligations - Summary of Estimated Net Sales Related to Performance Obligation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AssetsHeldforSaleDetails" roleURI="http://www.insight.com/role/AssetsHeldforSaleDetails">
        <link:definition>9955523 - Disclosure - Assets Held for Sale (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetEarningsPerShareAdditionalInformationDetails" roleURI="http://www.insight.com/role/NetEarningsPerShareAdditionalInformationDetails">
        <link:definition>9955524 - Disclosure - Net Earnings Per Share - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetEarningsPerShareSummaryofReconciliationofDenominatorsofBasicandDilutedEPSCalculationsDetails" roleURI="http://www.insight.com/role/NetEarningsPerShareSummaryofReconciliationofDenominatorsofBasicandDilutedEPSCalculationsDetails">
        <link:definition>9955525 - Disclosure - Net Earnings Per Share - Summary of Reconciliation of Denominators of Basic and Diluted EPS Calculations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsSummaryofLongTermDebtDetails" roleURI="http://www.insight.com/role/DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsSummaryofLongTermDebtDetails">
        <link:definition>9955526 - Disclosure - Debt, Inventory Financing Facilities, Finance Leases and Other Financing Obligations - Summary of Long-Term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsSummaryofLongTermDebtDetails_1" roleURI="http://www.insight.com/role/DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsSummaryofLongTermDebtDetails_1">
        <link:definition>9955526 - Disclosure - Debt, Inventory Financing Facilities, Finance Leases and Other Financing Obligations - Summary of Long-Term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsAdditionalInformationDetails" roleURI="http://www.insight.com/role/DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsAdditionalInformationDetails">
        <link:definition>9955527 - Disclosure - Debt, Inventory Financing Facilities, Finance Leases and Other Financing Obligations - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsSummaryofDebtDetails" roleURI="http://www.insight.com/role/DebtInventoryFinancingFacilitiesFinanceLeasesandOtherFinancingObligationsSummaryofDebtDetails">
        <link:definition>9955528 - Disclosure - Debt, Inventory Financing Facilities, Finance Leases and Other Financing Obligations - Summary of Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDetails" roleURI="http://www.insight.com/role/IncomeTaxesDetails">
        <link:definition>9955529 - Disclosure - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareRepurchaseProgramDetails" roleURI="http://www.insight.com/role/ShareRepurchaseProgramDetails">
        <link:definition>9955530 - Disclosure - Share Repurchase Program (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesDetails" roleURI="http://www.insight.com/role/CommitmentsandContingenciesDetails">
        <link:definition>9955531 - Disclosure - Commitments and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationAdditionalInformationDetails" roleURI="http://www.insight.com/role/SegmentInformationAdditionalInformationDetails">
        <link:definition>9955532 - Disclosure - Segment Information - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationSummaryofRevenueDisaggregatedbyReportableOperatingSegmentsDetails" roleURI="http://www.insight.com/role/SegmentInformationSummaryofRevenueDisaggregatedbyReportableOperatingSegmentsDetails">
        <link:definition>9955533 - Disclosure - Segment Information - Summary of Revenue Disaggregated by Reportable Operating Segments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationSummaryofResultsofOperationsbyReportableOperatingSegmentDetails" roleURI="http://www.insight.com/role/SegmentInformationSummaryofResultsofOperationsbyReportableOperatingSegmentDetails">
        <link:definition>9955534 - Disclosure - Segment Information - Summary of Results of Operations by Reportable Operating Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationSummaryofTotalAssetsbyReportableOperatingSegmentDetails" roleURI="http://www.insight.com/role/SegmentInformationSummaryofTotalAssetsbyReportableOperatingSegmentDetails">
        <link:definition>9955535 - Disclosure - Segment Information - Summary of Total Assets by Reportable Operating Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationSummaryofPreTaxDepreciationandAmortizationbyOperatingSegmentDetails" roleURI="http://www.insight.com/role/SegmentInformationSummaryofPreTaxDepreciationandAmortizationbyOperatingSegmentDetails">
        <link:definition>9955536 - Disclosure - Segment Information - Summary of Pre-Tax Depreciation and Amortization by Operating Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionDetails" roleURI="http://www.insight.com/role/AcquisitionDetails">
        <link:definition>9955537 - Disclosure - Acquisition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeInstrumentsandHedgingActivitiesDetails" roleURI="http://www.insight.com/role/DerivativeInstrumentsandHedgingActivitiesDetails">
        <link:definition>9955538 - Disclosure - Derivative Instruments and Hedging Activities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventDetails" roleURI="http://www.insight.com/role/SubsequentEventDetails">
        <link:definition>9955539 - Disclosure - Subsequent Event (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="nsit_StockReceivedDuringPeriodSharesConversionOfConvertibleSecurities" abstract="false" name="StockReceivedDuringPeriodSharesConversionOfConvertibleSecurities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="nsit_StockReceivedDuringPeriodValueConversionOfConvertibleSecurities" abstract="false" name="StockReceivedDuringPeriodValueConversionOfConvertibleSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_AdjustmentsToAdditionalPaidInCapitalDecreaseFromExciseTaxOnStockRepurchases" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalDecreaseFromExciseTaxOnStockRepurchases" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_SettlementOfWarrantConversionShares" abstract="false" name="SettlementOfWarrantConversionShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="nsit_SettlementOfWarrantConversionValue" abstract="false" name="SettlementOfWarrantConversionValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_OtherAdjustments" abstract="false" name="OtherAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_IncreaseDecreaseInAccountsPayableNoncurrent" abstract="false" name="IncreaseDecreaseInAccountsPayableNoncurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_PaymentsForSettlementOfWarrants" abstract="false" name="PaymentsForSettlementOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_ProceedsFromRepaymentsOfInventoryFinancingFacilities" abstract="false" name="ProceedsFromRepaymentsOfInventoryFinancingFacilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_ReceivablesContractLiabilitiesAndPerformanceObligationsTextBlock" abstract="false" name="ReceivablesContractLiabilitiesAndPerformanceObligationsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="nsit_RealEstateHeldForSaleTextBlock" abstract="false" name="RealEstateHeldForSaleTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="nsit_ScheduleOfOperatingSegmentsByGeographicLocationTableTextBlock" abstract="false" name="ScheduleOfOperatingSegmentsByGeographicLocationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="nsit_ContractWithReceivablesAndContractLiabilityTableTextBlock" abstract="false" name="ContractWithReceivablesAndContractLiabilityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="nsit_ChangesInContractAssetsRollForward" abstract="true" name="ChangesInContractAssetsRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nsit_ContractWithCustomerAssetRecognizedNetOfReclassificationToReceivables" abstract="false" name="ContractWithCustomerAssetRecognizedNetOfReclassificationToReceivables" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_ChangesInContractLiabilitiesRollForward" abstract="true" name="ChangesInContractLiabilitiesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nsit_ContractWithCustomerLiabilityCashReceivedInAdvanceAndNotRecognizedAsRevenue" abstract="false" name="ContractWithCustomerLiabilityCashReceivedInAdvanceAndNotRecognizedAsRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_AssetImpairmentLossCumulativeAmount" abstract="false" name="AssetImpairmentLossCumulativeAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_ConvertibleSeniorNotesDueTwoThousandTwentyFiveMember" abstract="true" name="ConvertibleSeniorNotesDueTwoThousandTwentyFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_EarningsPerShareBasicAndDiluted1Abstract" abstract="true" name="EarningsPerShareBasicAndDiluted1Abstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nsit_AssetBasedLendingFacilityMember" abstract="true" name="AssetBasedLendingFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_SeniorUnsecuredNotesDueTwoThousandThirtyTwoMember" abstract="true" name="SeniorUnsecuredNotesDueTwoThousandThirtyTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_UnsecuredInventoryFinancingFacilityMember" abstract="true" name="UnsecuredInventoryFinancingFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_InventoryFinancingFacilityMember" abstract="true" name="InventoryFinancingFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_SixthAmendmentToCreditAgreementMember" abstract="true" name="SixthAmendmentToCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_ForeignCurrencyBorrowingsMember" abstract="true" name="ForeignCurrencyBorrowingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_FirstInLastOutRevolvingFacilityMember" abstract="true" name="FirstInLastOutRevolvingFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_MUFGBankLimitedMember" abstract="true" name="MUFGBankLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_PNCFacilityMember" abstract="true" name="PNCFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_CanadaFacilityMember" abstract="true" name="CanadaFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_EMEAFacilitiesMember" abstract="true" name="EMEAFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_LineOfCreditFacilityAccordionFeatureIncreaseLimit" abstract="false" name="LineOfCreditFacilityAccordionFeatureIncreaseLimit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_RepurchasePriceAsPercentageOfPrincipalAmount" abstract="false" name="RepurchasePriceAsPercentageOfPrincipalAmount" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nsit_DebtInstrumentConvertibleSharesPerThousandOfPrincipalAmountOfNotes" abstract="false" name="DebtInstrumentConvertibleSharesPerThousandOfPrincipalAmountOfNotes" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="nsit_PrincipalAmountPerNoteUsedInConversionRate" abstract="false" name="PrincipalAmountPerNoteUsedInConversionRate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_DebtInstrumentConvertibleNumberOfSharesReceived" abstract="false" name="DebtInstrumentConvertibleNumberOfSharesReceived" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="nsit_ClassOfWarrantOrRightTermination" abstract="false" name="ClassOfWarrantOrRightTermination" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="nsit_ClassOfWarrantOrRightSettledCash" abstract="false" name="ClassOfWarrantOrRightSettledCash" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_ClassOfWarrantOrRightLiability" abstract="false" name="ClassOfWarrantOrRightLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_DebtInstrumentChangeInFairValueSettlementLiabilityAmount" abstract="false" name="DebtInstrumentChangeInFairValueSettlementLiabilityAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_ClassOfWarrantOrRightIssued" abstract="false" name="ClassOfWarrantOrRightIssued" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="nsit_InventoryFinancingFacilityRateIfVendorTermsNotMetEqualPrimePlus" abstract="false" name="InventoryFinancingFacilityRateIfVendorTermsNotMetEqualPrimePlus" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nsit_InventoryFinancingFacilityRateIfVendorTermsNotMetEqualLiborPlus" abstract="false" name="InventoryFinancingFacilityRateIfVendorTermsNotMetEqualLiborPlus" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nsit_ScheduleOfShareRepurchaseProgramsTable" abstract="true" name="ScheduleOfShareRepurchaseProgramsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="nsit_September112024StockRepurchaseProgramMember" abstract="true" name="September112024StockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_ValueActCapitalMember" abstract="true" name="ValueActCapitalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_ScheduleOfShareRepurchaseProgramsLineItems" abstract="true" name="ScheduleOfShareRepurchaseProgramsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nsit_StockRepurchasedAndRetiredDuringPeriodDiscountPercentage" abstract="false" name="StockRepurchasedAndRetiredDuringPeriodDiscountPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nsit_CommitmentsAndContingenciesTable" abstract="true" name="CommitmentsAndContingenciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="nsit_CloudServicesMember" abstract="true" name="CloudServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_SoftwareAsAServiceMember" abstract="true" name="SoftwareAsAServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_CommitmentsAndContingenciesLineItems" abstract="true" name="CommitmentsAndContingenciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nsit_NumberOfMonthOfSalaryPaidAsSeveranceOnChangeOfControl" abstract="false" name="NumberOfMonthOfSalaryPaidAsSeveranceOnChangeOfControl" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="nsit_HardwareMember" abstract="true" name="HardwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_SoftwareMember" abstract="true" name="SoftwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_LargeEnterpriseCorporateMember" abstract="true" name="LargeEnterpriseCorporateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_CommercialClientGroupMember" abstract="true" name="CommercialClientGroupMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_PublicSectorMember" abstract="true" name="PublicSectorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_NorthAmericaSegmentMember" abstract="true" name="NorthAmericaSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_EMEASegmentMember" abstract="true" name="EMEASegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_APACSegmentMember" abstract="true" name="APACSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_SellingGeneralAndAdministrativeExpenseAdjusted" abstract="false" name="SellingGeneralAndAdministrativeExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_OperatingIncomeLossAdjusted" abstract="false" name="OperatingIncomeLossAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_CorporateAndEliminationsMember" abstract="true" name="CorporateAndEliminationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_SekuroLimitedSekuroMember" abstract="true" name="SekuroLimitedSekuroMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_Inspire11LLCInspire11Member" abstract="true" name="Inspire11LLCInspire11Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_InfoCenter.ioMember" abstract="true" name="InfoCenter.ioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_EarnountPaymentOneMember" abstract="true" name="EarnountPaymentOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_EarnountPaymentTwoMember" abstract="true" name="EarnountPaymentTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_PaymentsToAcquireBusinessesNetOfSellerRetentionFund" abstract="false" name="PaymentsToAcquireBusinessesNetOfSellerRetentionFund" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_BusinessCombinationConsiderationTransferredSellerRetentionFund" abstract="false" name="BusinessCombinationConsiderationTransferredSellerRetentionFund" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_BusinessCombinationOtherCostsPayable" abstract="false" name="BusinessCombinationOtherCostsPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_BusinessCombinationSettlementOfPreExistingRelationship" abstract="false" name="BusinessCombinationSettlementOfPreExistingRelationship" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_BusinessCombinationConsiderationTransferredIncentive" abstract="false" name="BusinessCombinationConsiderationTransferredIncentive" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nsit_BusinessCombinationPercentageOfGoodwillDeductibleForIncomeTaxPurposes" abstract="false" name="BusinessCombinationPercentageOfGoodwillDeductibleForIncomeTaxPurposes" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="nsit_ForeignExchangeForwardContractOneMember" abstract="true" name="ForeignExchangeForwardContractOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nsit_ForeignExchangeForwardContractTwoMember" abstract="true" name="ForeignExchangeForwardContractTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
