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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:a04e7081-c684-40a3-b694-a161c14cb216,g:66fbe220-107a-480d-866a-2c1d1c561924-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:irm="http://www.ironmountain.com/20210331" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:num="http://www.xbrl.org/dtr/type/numeric" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.ironmountain.com/20210331">
  <xs:import namespace="http://fasb.org/srt/2020-01-31" schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2020-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.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/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.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/2020-01-31" schemaLocation="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.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="irm-20210331_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="irm-20210331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" 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="irm-20210331_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="irm-20210331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://www.ironmountain.com/role/CoverPage">
        <link:definition>0001001 - 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.ironmountain.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS">
        <link:definition>1001002 - 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.ironmountain.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical">
        <link:definition>1002003 - 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.ironmountain.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS">
        <link:definition>1003004 - 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="CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" roleURI="http://www.ironmountain.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical">
        <link:definition>1004005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (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="CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME" roleURI="http://www.ironmountain.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME">
        <link:definition>1005006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) 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="CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY" roleURI="http://www.ironmountain.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY">
        <link:definition>1006007 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF 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.ironmountain.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>1007008 - 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="CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" roleURI="http://www.ironmountain.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical">
        <link:definition>1008009 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (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="General" roleURI="http://www.ironmountain.com/role/General">
        <link:definition>2101101 - Disclosure - General</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="SummaryofSignificantAccountingPolicies" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPolicies">
        <link:definition>2102102 - Disclosure - Summary of Significant Accounting 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="SummaryofSignificantAccountingPoliciesPolicies" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesPolicies">
        <link:definition>2203201 - Disclosure - Summary of Significant Accounting Policies (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="SummaryofSignificantAccountingPoliciesTables" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesTables">
        <link:definition>2304301 - Disclosure - Summary of Significant Accounting Policies (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="SummaryofSignificantAccountingPoliciesAllowanceforDoubtfulAccountsandCreditMemoReservesDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesAllowanceforDoubtfulAccountsandCreditMemoReservesDetails">
        <link:definition>2405401 - Disclosure - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts and Credit Memo Reserves (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="SummaryofSignificantAccountingPoliciesSupplementalBalanceSheetDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesSupplementalBalanceSheetDetails">
        <link:definition>2406402 - Disclosure - Summary of Significant Accounting Policies - Supplemental Balance Sheet (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="SummaryofSignificantAccountingPoliciesLeasesCostsDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesLeasesCostsDetails">
        <link:definition>2407403 - Disclosure - Summary of Significant Accounting Policies - Leases Costs (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="SummaryofSignificantAccountingPoliciesSupplementalCashFlowsDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesSupplementalCashFlowsDetails">
        <link:definition>2408404 - Disclosure - Summary of Significant Accounting Policies - Supplemental Cash Flows (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="SummaryofSignificantAccountingPoliciesScheduleofChangesinCarryingValueofGoodwillDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesScheduleofChangesinCarryingValueofGoodwillDetails">
        <link:definition>2409405 - Disclosure - Summary of Significant Accounting Policies - Schedule of Changes in Carrying Value of Goodwill (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="SummaryofSignificantAccountingPoliciesInvestmentsNarrativeDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesInvestmentsNarrativeDetails">
        <link:definition>2410406 - Disclosure - Summary of Significant Accounting Policies - Investments Narrative (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="SummaryofSignificantAccountingPoliciesFairValueMeasurementsDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesFairValueMeasurementsDetails">
        <link:definition>2411407 - Disclosure - Summary of Significant Accounting Policies - Fair Value Measurements (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="SummaryofSignificantAccountingPoliciesAccumulatedOtherComprehensiveIncomeandOtherExpensesDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesAccumulatedOtherComprehensiveIncomeandOtherExpensesDetails">
        <link:definition>2412408 - Disclosure - Summary of Significant Accounting Policies - Accumulated Other Comprehensive Income and Other Expenses (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="SummaryofSignificantAccountingPoliciesContractFulfillmentAssetsDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesContractFulfillmentAssetsDetails">
        <link:definition>2413409 - Disclosure - Summary of Significant Accounting Policies - Contract Fulfillment Assets (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="SummaryofSignificantAccountingPoliciesSummaryofDeferredRevenueLiabilitiesDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesSummaryofDeferredRevenueLiabilitiesDetails">
        <link:definition>2414410 - Disclosure - Summary of Significant Accounting Policies - Summary of Deferred Revenue 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="SummaryofSignificantAccountingPoliciesStorageRentalDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesStorageRentalDetails">
        <link:definition>2415411 - Disclosure - Summary of Significant Accounting Policies - Storage Rental (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="SummaryofSignificantAccountingPoliciesStockBasedCompensationNarrativeDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesStockBasedCompensationNarrativeDetails">
        <link:definition>2416412 - Disclosure - Summary of Significant Accounting Policies - Stock-Based Compensation Narrative (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="SummaryofSignificantAccountingPoliciesOtherExpenseIncomeNetIncomeTaxesDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesOtherExpenseIncomeNetIncomeTaxesDetails">
        <link:definition>2417413 - Disclosure - Summary of Significant Accounting Policies - Other Expense (Income), Net / 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="SummaryofSignificantAccountingPoliciesIncomePerShareAllowanceforDoubtfulAccountsIncomeTaxesandConcentrationofCreditRiskDetails" roleURI="http://www.ironmountain.com/role/SummaryofSignificantAccountingPoliciesIncomePerShareAllowanceforDoubtfulAccountsIncomeTaxesandConcentrationofCreditRiskDetails">
        <link:definition>2418414 - Disclosure - Summary of Significant Accounting Policies - Income Per Share, Allowance for Doubtful Accounts, Income Taxes, and Concentration of Credit Risk (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="DerivativeInstrumentsandHedgingActivities" roleURI="http://www.ironmountain.com/role/DerivativeInstrumentsandHedgingActivities">
        <link:definition>2119103 - Disclosure - Derivative Instruments and Hedging Activities</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="DerivativeInstrumentsandHedgingActivitiesTables" roleURI="http://www.ironmountain.com/role/DerivativeInstrumentsandHedgingActivitiesTables">
        <link:definition>2320302 - Disclosure - Derivative Instruments and Hedging Activities (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="DerivativeInstrumentsandHedgingActivitiesAdditionalInformationDetails" roleURI="http://www.ironmountain.com/role/DerivativeInstrumentsandHedgingActivitiesAdditionalInformationDetails">
        <link:definition>2421415 - Disclosure - Derivative Instruments and Hedging Activities - 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="DerivativeInstrumentsandHedgingActivitiesNetInvestmentHedgesDetails" roleURI="http://www.ironmountain.com/role/DerivativeInstrumentsandHedgingActivitiesNetInvestmentHedgesDetails">
        <link:definition>2422416 - Disclosure - Derivative Instruments and Hedging Activities - Net Investment Hedges (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="DerivativeInstrumentsandHedgingActivitiesHedgeofNetInvestmentDetails" roleURI="http://www.ironmountain.com/role/DerivativeInstrumentsandHedgingActivitiesHedgeofNetInvestmentDetails">
        <link:definition>2423417 - Disclosure - Derivative Instruments and Hedging Activities - Hedge of Net Investment (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="Debt" roleURI="http://www.ironmountain.com/role/Debt">
        <link:definition>2124104 - Disclosure - Debt</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="DebtTables" roleURI="http://www.ironmountain.com/role/DebtTables">
        <link:definition>2325303 - Disclosure - Debt (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="DebtScheduleofLongTermDebtDetails" roleURI="http://www.ironmountain.com/role/DebtScheduleofLongTermDebtDetails">
        <link:definition>2426418 - Disclosure - Debt - Schedule 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="DebtCashPoolDetails" roleURI="http://www.ironmountain.com/role/DebtCashPoolDetails">
        <link:definition>2427419 - Disclosure - Debt - Cash Pool (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="DebtLettersofCreditDetails" roleURI="http://www.ironmountain.com/role/DebtLettersofCreditDetails">
        <link:definition>2428420 - Disclosure - Debt - Letters of Credit (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="CommitmentsandContingencies" roleURI="http://www.ironmountain.com/role/CommitmentsandContingencies">
        <link:definition>2129105 - 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="StockholdersEquityMatters" roleURI="http://www.ironmountain.com/role/StockholdersEquityMatters">
        <link:definition>2130106 - Disclosure - Stockholders' Equity Matters</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="StockholdersEquityMattersTables" roleURI="http://www.ironmountain.com/role/StockholdersEquityMattersTables">
        <link:definition>2331304 - Disclosure - Stockholders' Equity Matters (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="StockholdersEquityMattersDividendsDeclaredDetails" roleURI="http://www.ironmountain.com/role/StockholdersEquityMattersDividendsDeclaredDetails">
        <link:definition>2432421 - Disclosure - Stockholders' Equity Matters - Dividends Declared (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="SegmentInformation" roleURI="http://www.ironmountain.com/role/SegmentInformation">
        <link:definition>2133107 - 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="SegmentInformationTables" roleURI="http://www.ironmountain.com/role/SegmentInformationTables">
        <link:definition>2334305 - 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="SegmentInformationAdditionalInformationDetails" roleURI="http://www.ironmountain.com/role/SegmentInformationAdditionalInformationDetails">
        <link:definition>2435422 - 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="SegmentInformationSegmentReportingInformationbySegmentDetails" roleURI="http://www.ironmountain.com/role/SegmentInformationSegmentReportingInformationbySegmentDetails">
        <link:definition>2436423 - Disclosure - Segment Information - Segment Reporting Information by 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="SegmentInformationReconciliationtoIncomefromContinuingOperationsDetails" roleURI="http://www.ironmountain.com/role/SegmentInformationReconciliationtoIncomefromContinuingOperationsDetails">
        <link:definition>2437424 - Disclosure - Segment Information - Reconciliation to Income from Continuing Operations (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="SegmentInformationRevenuesbyProductandServiceLinesbySegmentDetails" roleURI="http://www.ironmountain.com/role/SegmentInformationRevenuesbyProductandServiceLinesbySegmentDetails">
        <link:definition>2438425 - Disclosure - Segment Information - Revenues by Product and Service Lines by 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="RelatedParties" roleURI="http://www.ironmountain.com/role/RelatedParties">
        <link:definition>2139108 - Disclosure - Related Parties</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="RelatedPartiesDetails" roleURI="http://www.ironmountain.com/role/RelatedPartiesDetails">
        <link:definition>2440426 - Disclosure - Related Parties - (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="ProjectSummit" roleURI="http://www.ironmountain.com/role/ProjectSummit">
        <link:definition>2141109 - Disclosure - Project Summit</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="ProjectSummitTables" roleURI="http://www.ironmountain.com/role/ProjectSummitTables">
        <link:definition>2342306 - Disclosure - Project Summit (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="ProjectSummitAdditionalInformationDetails" roleURI="http://www.ironmountain.com/role/ProjectSummitAdditionalInformationDetails">
        <link:definition>2443427 - Disclosure - Project Summit - 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="ProjectSummitRestructuringChargesDetails" roleURI="http://www.ironmountain.com/role/ProjectSummitRestructuringChargesDetails">
        <link:definition>2444428 - Disclosure - Project Summit - Restructuring Charges (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="ProjectSummitRestructuringRollforwardDetails" roleURI="http://www.ironmountain.com/role/ProjectSummitRestructuringRollforwardDetails">
        <link:definition>2445429 - Disclosure - Project Summit - Restructuring Rollforward (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="SubsequentEvents" roleURI="http://www.ironmountain.com/role/SubsequentEvents">
        <link:definition>2146110 - Disclosure - Subsequent Events</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="SubsequentEventsDetails" roleURI="http://www.ironmountain.com/role/SubsequentEventsDetails">
        <link:definition>2447430 - Disclosure - Subsequent Events (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="irm_PerformanceUnitsAbstract" abstract="true" name="PerformanceUnitsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="irm_NewCreditAgreementMember" abstract="true" name="NewCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_TermLoanFacilityMember" abstract="true" name="TermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_CommissionsMember" abstract="true" name="CommissionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_August2023CrossCurrencySwapAgreementsMember" abstract="true" name="August2023CrossCurrencySwapAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_Unamortizeddebtissuanceexpensenetofcurrentportion" abstract="false" name="Unamortizeddebtissuanceexpensenetofcurrentportion" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_ShareBasedPaymentArrangementNoncashExpensNetRestructuring" abstract="false" name="ShareBasedPaymentArrangementNoncashExpensNetRestructuring" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_LesseeOperatingAndFinanceLeaseCurrentAbstract" abstract="true" name="LesseeOperatingAndFinanceLeaseCurrentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="irm_NoncashInvestingAndFinancingActivitiesFinancingLeases" abstract="false" name="NoncashInvestingAndFinancingActivitiesFinancingLeases" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_PaymentsforCustomerInducements" abstract="false" name="PaymentsforCustomerInducements" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_TRSCashPoolMember" abstract="true" name="TRSCashPoolMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_CashPoolAgreementCashPositionGross" abstract="false" name="CashPoolAgreementCashPositionGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_LesseeOperatingAndFinanceLeaseNonCurrentAbstract" abstract="true" name="LesseeOperatingAndFinanceLeaseNonCurrentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="irm_ScheduleOfNetCashPositionInCashPoolAgreementsTableTextBlock" abstract="false" name="ScheduleOfNetCashPositionInCashPoolAgreementsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="irm_AccruedProfessionalFeesMember" abstract="true" name="AccruedProfessionalFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_TwoThousandTwentyOneMember" abstract="true" name="TwoThousandTwentyOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_ContractWithCustomerAssetAndLiabilitiesTable" abstract="true" name="ContractWithCustomerAssetAndLiabilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="irm_ProceedsFromIssuanceOfSecuredDebtShortTermAndLongTerm" abstract="false" name="ProceedsFromIssuanceOfSecuredDebtShortTermAndLongTerm" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_RealEstateMortgagesFinanceLeaseLiabilitiesAndOtherMember" abstract="true" name="RealEstateMortgagesFinanceLeaseLiabilitiesAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_LongtermDebtGrossCurrentMaturities" abstract="false" name="LongtermDebtGrossCurrentMaturities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="irm_PercentageOfAchievementOfPredefinedRevenueAndROICTargets" abstract="false" name="PercentageOfAchievementOfPredefinedRevenueAndROICTargets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="irm_AmortizationOfIntangibleAssetsCustomerInducementsAndMarketLeases" abstract="false" name="AmortizationOfIntangibleAssetsCustomerInducementsAndMarketLeases" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_OtherComprehensiveIncomeLossForeignCurrencyTransactionandTranslationAdjustmentExcludingRedeemableNoncontrollingInterestNetofTax" abstract="false" name="OtherComprehensiveIncomeLossForeignCurrencyTransactionandTranslationAdjustmentExcludingRedeemableNoncontrollingInterestNetofTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_SeniorNotes5PercentDue2028MemberMember" abstract="true" name="SeniorNotes5PercentDue2028MemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_PaymentsForStockPlans" abstract="false" name="PaymentsForStockPlans" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_AssetsNoncurrentExcludingPropertyPlantAndEquipmentNet" abstract="false" name="AssetsNoncurrentExcludingPropertyPlantAndEquipmentNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_GlobalDataCenterBusinessMember" abstract="true" name="GlobalDataCenterBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_IncrementalCommonSharesAttributableToShareBasedPaymentsRestrictedStockAndRSUsAndPUs" abstract="false" name="IncrementalCommonSharesAttributableToShareBasedPaymentsRestrictedStockAndRSUsAndPUs" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="irm_CashPoolAgreementOutstandingBorrowings" abstract="false" name="CashPoolAgreementOutstandingBorrowings" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_MakespaceMember" abstract="true" name="MakespaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_TermLoanBMember" abstract="true" name="TermLoanBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_WebWerksJVMember" abstract="true" name="WebWerksJVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_SeniorNotes525PercentDue2030Member" abstract="true" name="SeniorNotes525PercentDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_StorageRentalPowerAndConnectivityMember" abstract="true" name="StorageRentalPowerAndConnectivityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_GBPSeniorNotes3.875Percentdue2025Member" abstract="true" name="GBPSeniorNotes3.875Percentdue2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_SeniorNotes4.875Percentdue2027Member" abstract="true" name="SeniorNotes4.875Percentdue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_ProjectSummitMember" abstract="true" name="ProjectSummitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_TwoThousandNineteenMember" abstract="true" name="TwoThousandNineteenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_ContractwithCustomerAssetAccumulatedAmortization" abstract="false" name="ContractwithCustomerAssetAccumulatedAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_GlobalRecordsandInformationManagementBusinessMember" abstract="true" name="GlobalRecordsandInformationManagementBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_SeniorNotes5625PercentDue2032Member" abstract="true" name="SeniorNotes5625PercentDue2032Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_SeniorNotes45PercentDue2031Member" abstract="true" name="SeniorNotes45PercentDue2031Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_AccumulatedGainLossNetDerivativesParentMember" abstract="true" name="AccumulatedGainLossNetDerivativesParentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_OperatingLeaseModificationsAndReassessments" abstract="false" name="OperatingLeaseModificationsAndReassessments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_RepaymentsOfSecuredDebtShortTermAndLongTerm" abstract="false" name="RepaymentsOfSecuredDebtShortTermAndLongTerm" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_DataManagementMember" abstract="true" name="DataManagementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_SeniorNotes4.875PercentDue2029Member" abstract="true" name="SeniorNotes4.875PercentDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_EuroNotesMember" abstract="true" name="EuroNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_NoncashOrPartNoncashTransactionOperatingLeases" abstract="false" name="NoncashOrPartNoncashTransactionOperatingLeases" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_IncrementalCommonSharesAttributableToShareBasedPaymentsArrangementsStockOption" abstract="false" name="IncrementalCommonSharesAttributableToShareBasedPaymentsArrangementsStockOption" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="irm_AccountsReceivablesSecuritizationProgramMember" abstract="true" name="AccountsReceivablesSecuritizationProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_TermLoanAMember" abstract="true" name="TermLoanAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_OtherNonoperatingIncomeExpenseOtherNet" abstract="false" name="OtherNonoperatingIncomeExpenseOtherNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_IntakeCostsMember" abstract="true" name="IntakeCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_OtherNonoperatingIncomeExpenseNet" abstract="false" name="OtherNonoperatingIncomeExpenseNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_UnamortizedDebtIssuanceExpenseNet" abstract="false" name="UnamortizedDebtIssuanceExpenseNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_QRSCashPoolMember" abstract="true" name="QRSCashPoolMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_FrankfurtJVMember" abstract="true" name="FrankfurtJVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_AdjustedEarningsBeforeInterestExpenseNetProvisionBenefitForIncomeTaxesDepreciationAndAmortization" abstract="false" name="AdjustedEarningsBeforeInterestExpenseNetProvisionBenefitForIncomeTaxesDepreciationAndAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_InformationDestructionMember" abstract="true" name="InformationDestructionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_DataCenterMember" abstract="true" name="DataCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_ScheduleOfReconciliationOfProfitLossToAdjustedEBITDATableTextBlock" abstract="false" name="ScheduleOfReconciliationOfProfitLossToAdjustedEBITDATableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="irm_AssetsNoncurrentExcludingPropertyPlantAndEquipmentNetAbstract" abstract="true" name="AssetsNoncurrentExcludingPropertyPlantAndEquipmentNetAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="irm_AdjustmentstoAdditionalPaidinCapitalChangeinValueofRedeemableNoncontrollingInterests" abstract="false" name="AdjustmentstoAdditionalPaidinCapitalChangeinValueofRedeemableNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_RedeemableNoncontrollingInterestsMember" abstract="true" name="RedeemableNoncontrollingInterestsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_IncreaseDecreaseInContractWithCustomerLiabilitiesNet" abstract="false" name="IncreaseDecreaseInContractWithCustomerLiabilitiesNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_LongTermDebtGrossNetofCurrentPortion" abstract="false" name="LongTermDebtGrossNetofCurrentPortion" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_EquityMethodInvestmentsAdditionalInvestments" abstract="false" name="EquityMethodInvestmentsAdditionalInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_OSGInvestmentMember" abstract="true" name="OSGInvestmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_ForeignCurrencyTransactionGainLossUnrealizedAndAdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesOther" abstract="false" name="ForeignCurrencyTransactionGainLossUnrealizedAndAdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_EquityMethodInvestmentsAdditionalInvestmentPeriod" abstract="false" name="EquityMethodInvestmentsAdditionalInvestmentPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="irm_UKBilateralRevolvingCreditFacilityMember" abstract="true" name="UKBilateralRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_TemporaryEquityIncreaseFromDistributions" abstract="false" name="TemporaryEquityIncreaseFromDistributions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_AustralianDollarTermLoanMember" abstract="true" name="AustralianDollarTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_CashPoolAgreementCashPositionNet" abstract="false" name="CashPoolAgreementCashPositionNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_ContractWithCustomerAssetAndLiabilitiesLineItems" abstract="true" name="ContractWithCustomerAssetAndLiabilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="irm_TwoThousandTwentyMember" abstract="true" name="TwoThousandTwentyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_CashPoolAgreementNumberOfCashPools" abstract="false" name="CashPoolAgreementNumberOfCashPools" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="irm_February2026CrossCurrencySwapAgreementsMember" abstract="true" name="February2026CrossCurrencySwapAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_SeniorNotes5.25Percentdue2028Member" abstract="true" name="SeniorNotes5.25Percentdue2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_ReconcilingRelatedToUnconsolidatedVentures" abstract="false" name="ReconcilingRelatedToUnconsolidatedVentures" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="irm_RecordsManagementMember" abstract="true" name="RecordsManagementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="irm_OtherComprehensiveIncomeLossDerivativeGainLossNetofTax" abstract="false" name="OtherComprehensiveIncomeLossDerivativeGainLossNetofTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
