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    <link:label id="lab_us-gaap_PreferredStockDividendRatePercentage_ae548cca-5b02-4912-8f80-5c2caea8724f_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockDividendRatePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred stock, dividend rate (as a percent)</link:label>
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    <link:label id="lab_us-gaap_LongTermDebtByMaturityAbstract_label_en-US" xlink:label="lab_us-gaap_LongTermDebtByMaturityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Fiscal Year Maturity [Abstract]</link:label>
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    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_1a1d20f2-6e80-4409-8d96-8ef645b16d90_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock and paid in capital, par value (in dollars per share)</link:label>
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    <link:label id="lab_o_ReceivableForPropertyRebuilds_e7326319-5673-4218-ad30-f419718056e9_terseLabel_en-US" xlink:label="lab_o_ReceivableForPropertyRebuilds" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivable for property rebuilds</link:label>
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    <link:label id="lab_us-gaap_DepositAssets_7e7b201e-bf5f-4f29-8767-5a5f98d99107_terseLabel_en-US" xlink:label="lab_us-gaap_DepositAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-refundable escrow deposits for pending acquisitions</link:label>
    <link:label id="lab_us-gaap_DepositAssets_label_en-US" xlink:label="lab_us-gaap_DepositAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deposit Assets</link:label>
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    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_606cefc1-6231-4cb3-9adb-6781bfabc4f2_terseLabel_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of Significant Accounting Policies and Procedures and Recent Accounting Pronouncements</link:label>
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    <link:label id="lab_us-gaap_BusinessAcquisitionAcquireeDomain_a8a1c9b3-8bec-476f-ba45-a6d81ee21568_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Acquisition, Acquiree [Domain]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
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    <link:label id="lab_us-gaap_ProceedsFromLongTermLinesOfCredit_a91c7caa-8b73-419b-a9cb-eb51ea770914_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings on line of credit</link:label>
    <link:label id="lab_us-gaap_ProceedsFromLongTermLinesOfCredit_label_en-US" xlink:label="lab_us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Long-term Lines of Credit</link:label>
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    <link:label id="lab_us-gaap_AccountingPoliciesAbstract_label_en-US" xlink:label="lab_us-gaap_AccountingPoliciesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies [Abstract]</link:label>
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    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_label_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Compensation Related Costs, Share-based Payments [Abstract]</link:label>
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    <link:label id="lab_us-gaap_DividendsPayableCurrentAndNoncurrent_8aa9f0a1-30da-4e93-92a9-28f4020648e2_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Distributions payable</link:label>
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    <link:label id="lab_us-gaap_DividendsPayableCurrentAndNoncurrent_label_en-US" xlink:label="lab_us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends Payable</link:label>
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    <link:label id="lab_us-gaap_RepaymentsOfFirstMortgageBond_ac3d8eea-f73d-42cd-aed7-1403ea04c01a_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfFirstMortgageBond" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Principal payments on mortgages payable</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityTable_8215b05a-5d9e-4d94-be06-b7c3ad13559d_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit Facility [Table]</link:label>
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    <link:label id="lab_o_NotesPayableDueMarch2047FirstIssuanceMarch2017Member_833a2bcc-3259-4895-b960-d7fceabe0ded_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueMarch2047FirstIssuanceMarch2017Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">4.650% notes, issued in March 2017 and due in March 2047</link:label>
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    <link:label id="lab_o_EarningsPerShareTable_documentation_en-US" xlink:label="lab_o_EarningsPerShareTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">The table contains disclosure pertaining to basic and diluted earnings per share.</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_959a22df-2ce1-4c36-9edb-6ce81cff60be_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Federal Income Taxes</link:label>
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    <link:label id="lab_o_ConvenienceStoreMember_fcbb5739-8cd1-4e52-b8d5-fedb213f305d_terseLabel_en-US" xlink:label="lab_o_ConvenienceStoreMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convenience stores</link:label>
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    <link:label id="lab_us-gaap_Goodwill_df391f90-29ba-478c-b50f-3a8b312fb7e7_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_Goodwill_label_en-US" xlink:label="lab_us-gaap_Goodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
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    <link:label id="lab_o_RecurringCapitalExpendituresRealEstateImprovements_e9a3ba9b-bd4f-4b80-beb7-8eb20779059f_terseLabel_en-US" xlink:label="lab_o_RecurringCapitalExpendituresRealEstateImprovements" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Recurring capital expenditures</link:label>
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    <link:label id="lab_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_806d0c0d-105c-407f-a088-70f749fc13a0_terseLabel_en-US" xlink:label="lab_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Real Estate, Type of Property [Axis]</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentAxis_ce4acdad-8f2f-4af0-a3ac-6556b3f3aea2_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument [Axis]</link:label>
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    <link:label id="lab_us-gaap_MortgagesMember_c042e756-db20-40f7-8b6a-228d8e7eb654_terseLabel_en-US" xlink:label="lab_us-gaap_MortgagesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mortgages Payable</link:label>
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    <link:label id="lab_us-gaap_ExecutiveOfficerMember_060521b4-eb15-43e0-8168-d3a72e5f1493_terseLabel_en-US" xlink:label="lab_us-gaap_ExecutiveOfficerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Executive officers</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_ef4ca2bd-68f3-42ad-9a94-16f33c916a5f_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CASH FLOWS FROM OPERATING ACTIVITIES</link:label>
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    <link:label id="lab_us-gaap_LoansPayable_5d07a599-e535-46c9-9e19-380a9177684c_terseLabel_en-US" xlink:label="lab_us-gaap_LoansPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term loans, net</link:label>
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    <link:label id="lab_us-gaap_NumberOfRealEstateProperties_21f03d16-e1ae-4212-b026-c6e190963b6d_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfRealEstateProperties" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Properties owned</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_a9725225-b1f7-4e1d-9232-f2e6510cfa92_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary selected financial data of consolidated VIEs</link:label>
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    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_17112a54-0c8e-4956-99b5-ded163acd130_verboseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Basic (in shares)</link:label>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_32b401cd-2a2e-466c-80b0-f0fc2adf1080_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquired lease intangible assets, net</link:label>
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    <link:label id="lab_o_CreditFacilityMember_04ea9eb0-58b9-4e0f-8fcf-614d86299d6a_terseLabel_en-US" xlink:label="lab_o_CreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility</link:label>
    <link:label id="lab_o_CreditFacilityMember_label_en-US" xlink:label="lab_o_CreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Member]</link:label>
    <link:label id="lab_o_CreditFacilityMember_documentation_en-US" xlink:label="lab_o_CreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Realty Income Corp. Credit Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_CreditFacilityMember" xlink:href="o-20180930.xsd#o_CreditFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_CreditFacilityMember" xlink:to="lab_o_CreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_5b2ed636-b9d4-4770-af92-c50ddc208423_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CASH FLOWS FROM FINANCING ACTIVITIES</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
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    <link:label id="lab_us-gaap_DividendsAbstract_label_en-US" xlink:label="lab_us-gaap_DividendsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsAbstract"/>
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    <link:label id="lab_srt_IndustrialPropertyMember_560d5b3c-8624-4b5a-8261-327e26cf816b_terseLabel_en-US" xlink:label="lab_srt_IndustrialPropertyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Industrial</link:label>
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    <link:label id="lab_us-gaap_DividendsPayableLineItems_6502fe71-6c41-4f8e-8ef7-1ff8a17e8a23_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Distributions payable</link:label>
    <link:label id="lab_us-gaap_DividendsPayableLineItems_label_en-US" xlink:label="lab_us-gaap_DividendsPayableLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends Payable [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableLineItems" xlink:to="lab_us-gaap_DividendsPayableLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_dcb7aecb-6622-4646-abae-ef6e32099d68_terseLabel_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based compensation costs recognized</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
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    <link:label id="lab_us-gaap_OtherPaymentsToAcquireBusinesses_12a37251-e0e3-44a1-b314-8f5f0b7cab35_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherPaymentsToAcquireBusinesses" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-refundable escrow deposits for pending acquisitions</link:label>
    <link:label id="lab_us-gaap_OtherPaymentsToAcquireBusinesses_label_en-US" xlink:label="lab_us-gaap_OtherPaymentsToAcquireBusinesses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Payments to Acquire Businesses</link:label>
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    <link:label id="lab_us-gaap_AssetsAbstract_f336e94f-a8a8-4072-8fca-433f7c38ed8c_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ASSETS</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="lab_us-gaap_AssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RealEstateInvestmentMember_a0824715-2c1c-4f7a-8ba8-c548aa4bea2e_terseLabel_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Real Estate Investment</link:label>
    <link:label id="lab_us-gaap_RealEstateInvestmentMember_label_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Real Estate Investment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealEstateInvestmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateInvestmentMember" xlink:to="lab_us-gaap_RealEstateInvestmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_LineOfCreditFacilityNumberOfExtensions_5bf63911-292d-4879-966e-81cc414b82ab_terseLabel_en-US" xlink:label="lab_o_LineOfCreditFacilityNumberOfExtensions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of extensions</link:label>
    <link:label id="lab_o_LineOfCreditFacilityNumberOfExtensions_label_en-US" xlink:label="lab_o_LineOfCreditFacilityNumberOfExtensions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">LineOfCreditFacilityNumberOfExtensions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_LineOfCreditFacilityNumberOfExtensions" xlink:href="o-20180930.xsd#o_LineOfCreditFacilityNumberOfExtensions"/>
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    <link:label id="lab_us-gaap_OtherAccountsPayableAndAccruedLiabilities_5012a29a-22f5-4755-b607-2097804d8881_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAccountsPayableAndAccruedLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other items</link:label>
    <link:label id="lab_us-gaap_OtherAccountsPayableAndAccruedLiabilities_label_en-US" xlink:label="lab_us-gaap_OtherAccountsPayableAndAccruedLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Accounts Payable and Accrued Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccountsPayableAndAccruedLiabilities" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAccountsPayableAndAccruedLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAccountsPayableAndAccruedLiabilities" xlink:to="lab_us-gaap_OtherAccountsPayableAndAccruedLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_72123484-f78f-4de0-af50-0a9c3f710705_terseLabel_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
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    <link:label id="lab_us-gaap_SecurityDepositLiability_30093df7-ffa6-4496-b7c6-00d154106bb8_terseLabel_en-US" xlink:label="lab_us-gaap_SecurityDepositLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security deposits</link:label>
    <link:label id="lab_us-gaap_SecurityDepositLiability_label_en-US" xlink:label="lab_us-gaap_SecurityDepositLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Deposit Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecurityDepositLiability" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecurityDepositLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecurityDepositLiability" xlink:to="lab_us-gaap_SecurityDepositLiability" xlink:type="arc" order="1"/>
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    <link:label id="lab_o_AverageLeaseTerm_19ad1fa3-c609-4845-bd14-e08bb9f95351_terseLabel_en-US" xlink:label="lab_o_AverageLeaseTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average lease term</link:label>
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    <link:label id="lab_srt_RangeAxis_84ead6f2-db80-44e3-8f75-3466b6a4fffd_terseLabel_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Range [Axis]</link:label>
    <link:label id="lab_srt_RangeAxis_label_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Range [Axis]</link:label>
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    <link:label id="lab_us-gaap_DerivativeAssets_3017fcb5-9d66-4256-9c5a-fa259c0a07e9_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value of derivative assets</link:label>
    <link:label id="lab_us-gaap_DerivativeAssets_label_en-US" xlink:label="lab_us-gaap_DerivativeAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Asset</link:label>
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    <link:label id="lab_srt_RetailSiteMember_42631647-96d4-4e6f-8565-690820133781_terseLabel_en-US" xlink:label="lab_srt_RetailSiteMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retail</link:label>
    <link:label id="lab_srt_RetailSiteMember_label_en-US" xlink:label="lab_srt_RetailSiteMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retail Site [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RetailSiteMember" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RetailSiteMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RetailSiteMember" xlink:to="lab_srt_RetailSiteMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscount_217eb1e1-615e-486b-b2f9-8c040f36973e_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unamortized balance of original issuance premiums</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
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    <link:label id="lab_dei_EntityCurrentReportingStatus_605d5e04-5d1e-46a7-b14e-dd74ecb98bd3_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:label id="lab_dei_EntityCurrentReportingStatus_label_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
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    <link:label id="lab_dei_EntityEmergingGrowthCompany_68abd882-45fa-4d6b-aad6-2aa5f9a6b1e2_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
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    <link:label id="lab_us-gaap_SegmentDomain_df9e1e7b-a0bb-4bc6-a73e-e12723807022_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [Domain]</link:label>
    <link:label id="lab_us-gaap_SegmentDomain_label_en-US" xlink:label="lab_us-gaap_SegmentDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain" xlink:to="lab_us-gaap_SegmentDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e7f6d-f70e-40c6-89f2-bb46893ebba6_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash used in investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
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    <link:label id="lab_o_HealthAndFitness1Member_6be72479-ecb7-4f9c-aea2-3ba65ee2611f_terseLabel_en-US" xlink:label="lab_o_HealthAndFitness1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Health and fitness</link:label>
    <link:label id="lab_o_HealthAndFitness1Member_label_en-US" xlink:label="lab_o_HealthAndFitness1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">HealthAndFitness1Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_HealthAndFitness1Member" xlink:href="o-20180930.xsd#o_HealthAndFitness1Member"/>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_454bba8c-da1b-4d72-9259-80e907c12f71_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Shares, New Issues</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
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    <link:label id="lab_o_PropertiesOccupiedByApplicableTenantAssociatedWithMortgages_6de51d34-ac64-4cd3-bf78-6d018748b80b_terseLabel_en-US" xlink:label="lab_o_PropertiesOccupiedByApplicableTenantAssociatedWithMortgages" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Properties</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock_240ddfd8-2dd5-4ce2-abb4-9e2433e69d2b_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of accounts payable and accrued expenses</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_o_PartnershipUnitsValue_d2d97df1-0f22-443c-8688-572f05b759b7_terseLabel_en-US" xlink:label="lab_o_PartnershipUnitsValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value of partnership units issued</link:label>
    <link:label id="lab_o_PartnershipUnitsValue_label_en-US" xlink:label="lab_o_PartnershipUnitsValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PartnershipUnitsValue</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_PartnershipUnitsValue" xlink:href="o-20180930.xsd#o_PartnershipUnitsValue"/>
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    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_bff82ca4-bf5a-4a09-b751-665330b1d501_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of reconciliation of cash, cash equivalents and restricted cash</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restrictions on Cash and Cash Equivalents [Table Text Block]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:to="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsMember_e78b2c2d-4f83-4b69-bbc5-57a11af5139d_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets, net</link:label>
    <link:label id="lab_us-gaap_OtherAssetsMember_label_en-US" xlink:label="lab_us-gaap_OtherAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsMember" xlink:to="lab_us-gaap_OtherAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ClassificationOfVariableInterestEntityDomain_c054df6f-0114-444f-8add-6488f29dd58d_terseLabel_en-US" xlink:label="lab_us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Interest Entity, Classification [Domain]</link:label>
    <link:label id="lab_us-gaap_ClassificationOfVariableInterestEntityDomain_label_en-US" xlink:label="lab_us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Interest Entity, Classification [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:to="lab_us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_o_RealEstatePropertiesAcquiredIntangibleAndAssumedLiabilities_98a5cc0e-b8e8-40ff-bc22-e2162923027a_terseLabel_en-US" xlink:label="lab_o_RealEstatePropertiesAcquiredIntangibleAndAssumedLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Allocated to intangible liabilities related to leases and other assumed liabilities</link:label>
    <link:label id="lab_o_RealEstatePropertiesAcquiredIntangibleAndAssumedLiabilities_label_en-US" xlink:label="lab_o_RealEstatePropertiesAcquiredIntangibleAndAssumedLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RealEstatePropertiesAcquiredIntangibleAndAssumedLiabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_RealEstatePropertiesAcquiredIntangibleAndAssumedLiabilities" xlink:href="o-20180930.xsd#o_RealEstatePropertiesAcquiredIntangibleAndAssumedLiabilities"/>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_c9670625-fc57-40c6-ac88-cb922002cbd9_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average borrowing rate during the period (as a percent)</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit Facility, Interest Rate During Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDuringPeriod"/>
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    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_f92a223f-041a-4858-be16-07533f11f588_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Information</link:label>
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Reporting Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingDisclosureTextBlock" xlink:to="lab_us-gaap_SegmentReportingDisclosureTextBlock" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_db9b7c97-e8ce-43b3-9e2f-e252d9fade79_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationAxis" xlink:to="lab_us-gaap_BalanceSheetLocationAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalents_2a4f2d67-bb14-4a0d-aec9-96ca6ae5f334_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impounds related to mortgages payable</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalents_label_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Cash and Cash Equivalents</link:label>
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    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract"/>
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    <link:label id="lab_o_MortgagesRepaidInFullMember_ef0bcc51-7482-49cd-8ec8-1a3e8bbaa716_terseLabel_en-US" xlink:label="lab_o_MortgagesRepaidInFullMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mortgages repaid in full</link:label>
    <link:label id="lab_o_MortgagesRepaidInFullMember_label_en-US" xlink:label="lab_o_MortgagesRepaidInFullMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">MortgagesRepaidInFullMember</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfDebtTableTextBlock_403ed12e-3152-4a68-9847-859d2c8648c9_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of mortgages payable</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDebtTableTextBlock_ebfbc803-567b-4fff-82e2-f61ca643a3f3_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of notes payable</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDebtTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Debt [Table Text Block]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDebtTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfDebtTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RealEstatePropertiesLineItems_dd6a6075-0e6e-46de-a5af-195ea6b9a9f2_verboseLabel_en-US" xlink:label="lab_us-gaap_RealEstatePropertiesLineItems" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments in real estate properties</link:label>
    <link:label id="lab_us-gaap_RealEstatePropertiesLineItems_label_en-US" xlink:label="lab_us-gaap_RealEstatePropertiesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Real Estate Properties [Line Items]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstatePropertiesLineItems" xlink:to="lab_us-gaap_RealEstatePropertiesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_o_AccumulatedAmortizationOfIntangibleLiabilitiesBelowMarketLeases_e33e659b-4cad-41b9-8f7c-eeaeb8cb05ec_negatedLabel_en-US" xlink:label="lab_o_AccumulatedAmortizationOfIntangibleLiabilitiesBelowMarketLeases" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated amortization of acquired below-market leases</link:label>
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    <link:label id="lab_us-gaap_RepaymentsOfLongTermLinesOfCredit_4968b5da-dcfe-482e-a63f-f8e39c361a96_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermLinesOfCredit" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments on line of credit</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermLinesOfCredit_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermLinesOfCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayments of Long-term Lines of Credit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit"/>
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    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ec6743be-8d84-47a7-937c-d69a0fdba79c_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]</link:label>
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    <link:label id="lab_o_PartnershipOwnershipInterestPercentageRepresentedByPartnershipUnitsIssued_358372db-f445-4444-be28-fbd95cfacceb_terseLabel_en-US" xlink:label="lab_o_PartnershipOwnershipInterestPercentageRepresentedByPartnershipUnitsIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Third party partnership units, ownership interest (as a percent)</link:label>
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    <link:label id="lab_o_SeniorUnsecuredNotesPayableDue2047MemberMember_bccb465e-f258-40a4-8f6e-09730da7a880_terseLabel_en-US" xlink:label="lab_o_SeniorUnsecuredNotesPayableDue2047MemberMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">4.650% notes, $300 issued in March 2017 and $250 issued in December 2017, both due in March 2047</link:label>
    <link:label id="lab_o_SeniorUnsecuredNotesPayableDue2047MemberMember_label_en-US" xlink:label="lab_o_SeniorUnsecuredNotesPayableDue2047MemberMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SeniorUnsecuredNotesPayableDue2047Member [Member]</link:label>
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    <link:label id="lab_o_NumberOfMortgagesAssumedDuringPeriod_6b7ff092-6e18-4c77-92d4-5a7a3066c2be_terseLabel_en-US" xlink:label="lab_o_NumberOfMortgagesAssumedDuringPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of mortgages assumed</link:label>
    <link:label id="lab_o_NumberOfMortgagesAssumedDuringPeriod_label_en-US" xlink:label="lab_o_NumberOfMortgagesAssumedDuringPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Mortgages Assumed During Period</link:label>
    <link:label id="lab_o_NumberOfMortgagesAssumedDuringPeriod_documentation_en-US" xlink:label="lab_o_NumberOfMortgagesAssumedDuringPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of mortgages assumed during the period.</link:label>
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    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_0c5c0b56-67f3-4372-b12e-42a84c24e68f_terseLabel_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_60d6fe6f-2211-4495-96b1-226ff0d4d2e3_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment, Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
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    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_edac669e-30d9-45d4-8b3d-461d72e2b1ea_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest</link:label>
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    <link:label id="lab_us-gaap_MinorityInterest_b06f05bc-6210-4f0f-95fe-b3331728c6dc_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling interests</link:label>
    <link:label id="lab_us-gaap_MinorityInterest_7b9688d8-c985-433a-b207-d180cf67573e_periodStartLabel_en-US" xlink:label="lab_us-gaap_MinorityInterest" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying value at beginning of the period</link:label>
    <link:label id="lab_us-gaap_MinorityInterest_8adfffd4-7fea-40cc-98d6-1fe4dbe7bf5f_periodEndLabel_en-US" xlink:label="lab_us-gaap_MinorityInterest" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying value at end of the period</link:label>
    <link:label id="lab_us-gaap_MinorityInterest_label_en-US" xlink:label="lab_us-gaap_MinorityInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' Equity Attributable to Noncontrolling Interest</link:label>
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    <link:label id="lab_o_TransportationServiceMember_2bdb0a14-e9f4-40d2-abbb-b0e42dc81160_terseLabel_en-US" xlink:label="lab_o_TransportationServiceMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transportation services</link:label>
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    <link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_4fb8423a-b3ca-459d-be02-566c3f24a83d_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2019</link:label>
    <link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Maturities, Repayments of Principal in Year Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
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    <link:label id="lab_us-gaap_DebtDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtDisclosureAbstract"/>
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    <link:label id="lab_us-gaap_ShareBasedCompensationAwardTrancheOneMember_93b0e43f-2869-490b-8c84-a219bf7a74a8_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationAwardTrancheOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vesting on third anniversary of grant</link:label>
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    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_f82f683f-7e20-4323-b2cc-bf3b4a0b0920_terseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
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    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeAxis" xlink:to="lab_us-gaap_SubsequentEventTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_o_ImpairedPropertiesHeldForSaleNumber_e159ccb0-8892-4901-b1da-d98712557b31_terseLabel_en-US" xlink:label="lab_o_ImpairedPropertiesHeldForSaleNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of impaired properties held-for-sale</link:label>
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    <link:label id="lab_o_FiniteLivedIntangibleAssetsAmortizationExpenseIncreaseDecrease_e43a280e-ba13-4e2f-acc0-4d89b5fd8115_totalLabel_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsAmortizationExpenseIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Totals</link:label>
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    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_cf644858-cd5e-43c3-9791-47aa235ab871_terseLabel_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying value</link:label>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reported Value Measurement [Member]</link:label>
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    <link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_c61e0be0-b8eb-40ef-8aa5-0d182942c93a_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Maturities, Repayments of Principal in Year Four</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
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    <link:label id="lab_o_LoanExtensionPeriod_c8341c16-74c1-410b-bcd1-73ceb7e61959_terseLabel_en-US" xlink:label="lab_o_LoanExtensionPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loan extension period</link:label>
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    <link:label id="lab_o_BeverageMember_c64dba24-a683-4b6c-86e2-78874a5ca9e9_terseLabel_en-US" xlink:label="lab_o_BeverageMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beverages</link:label>
    <link:label id="lab_o_BeverageMember_label_en-US" xlink:label="lab_o_BeverageMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beverage [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_BeverageMember" xlink:href="o-20180930.xsd#o_BeverageMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_BeverageMember" xlink:to="lab_o_BeverageMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_f16c583e-0ff4-4f17-9a1d-034656e38fbe_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from common stock offerings, net</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_1c37aded-7bff-4621-9cd6-f527143ca552_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net proceeds from issuance of common shares</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_26980902-3774-4396-84dc-f3e0f5dfd614_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders&#8217; equity:</link:label>
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    <link:label id="lab_o_DollarStoresMember_d0dfc39f-92c6-4ae4-a413-c9ee3a091c87_terseLabel_en-US" xlink:label="lab_o_DollarStoresMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dollar stores</link:label>
    <link:label id="lab_o_DollarStoresMember_label_en-US" xlink:label="lab_o_DollarStoresMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">DollarStoresMember</link:label>
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    <link:label id="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_7234282d-701f-43fe-80c2-37016e57e7e1_terseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Recent Accounting Pronouncements</link:label>
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    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_4aac16a6-69e7-465a-a8f2-9c10671caf77_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net income available to common stockholders</link:label>
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    <link:label id="lab_o_PartnershipOwnershipInterestPercentage_5a684a59-5fe5-42a9-9a03-2421e905bdd1_terseLabel_en-US" xlink:label="lab_o_PartnershipOwnershipInterestPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Realty Income partnership units, ownership interest (as a percent)</link:label>
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    <link:label id="lab_us-gaap_PaymentsOfOrdinaryDividends_f74d0d4f-a298-484a-a4e3-84488eeb2e28_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfOrdinaryDividends" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred stock dividends paid</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfOrdinaryDividends" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfOrdinaryDividends"/>
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    <link:label id="lab_us-gaap_AreaOfRealEstateProperty_d245ac65-59c7-49f2-9186-b90f2ffc0f91_terseLabel_en-US" xlink:label="lab_us-gaap_AreaOfRealEstateProperty" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leasable square feet</link:label>
    <link:label id="lab_us-gaap_AreaOfRealEstateProperty_label_en-US" xlink:label="lab_us-gaap_AreaOfRealEstateProperty" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Area of Real Estate Property</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AreaOfRealEstateProperty" xlink:to="lab_us-gaap_AreaOfRealEstateProperty" xlink:type="arc" order="1"/>
    <link:label id="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFive_450faa33-83ff-4b25-a8cf-781639ef51dc_terseLabel_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFive" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2022</link:label>
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    <link:label id="lab_o_GainOnSaleOfPropertiesContinuingOperations_eaa669fa-ecbe-47de-911b-0bfe504a20b6_terseLabel_en-US" xlink:label="lab_o_GainOnSaleOfPropertiesContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain on sales of real estate</link:label>
    <link:label id="lab_o_GainOnSaleOfPropertiesContinuingOperations_57e58279-dd36-4d74-b8ee-cddc2b9e4cbf_negatedLabel_en-US" xlink:label="lab_o_GainOnSaleOfPropertiesContinuingOperations" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain on sales of real estate</link:label>
    <link:label id="lab_o_GainOnSaleOfPropertiesContinuingOperations_label_en-US" xlink:label="lab_o_GainOnSaleOfPropertiesContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">GainOnSaleOfPropertiesContinuingOperations</link:label>
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    <link:label id="lab_o_RentalRevenueMember_3986b9d1-1307-4181-aed5-5282937b3b4c_terseLabel_en-US" xlink:label="lab_o_RentalRevenueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rental Revenue</link:label>
    <link:label id="lab_o_RentalRevenueMember_label_en-US" xlink:label="lab_o_RentalRevenueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RentalRevenueMember</link:label>
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    <link:label id="lab_us-gaap_RealEstateHeldforsale_6ee67cd4-2e82-4005-a2d5-21e28cb33510_terseLabel_en-US" xlink:label="lab_us-gaap_RealEstateHeldforsale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Real estate held for sale, net</link:label>
    <link:label id="lab_us-gaap_RealEstateHeldforsale_label_en-US" xlink:label="lab_us-gaap_RealEstateHeldforsale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Real Estate Held-for-sale</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateHeldforsale" xlink:to="lab_us-gaap_RealEstateHeldforsale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_c5d85cb1-363f-4e5b-8233-5ffb2dc56869_verboseLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract"/>
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    <link:label id="lab_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_2e439deb-b5a2-4d4e-8486-6e5b67f68031_terseLabel_en-US" xlink:label="lab_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of Assets from Segment to Consolidated [Table]</link:label>
    <link:label id="lab_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_label_en-US" xlink:label="lab_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of Assets from Segment to Consolidated [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable" xlink:to="lab_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_68e18117-df5e-4b78-9f2a-ed73a8f321e5_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effective yield (as a percent)</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:to="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NoncontrollingInterestMember_725fa916-fff0-4cb7-b43a-932a1fb0cf04_terseLabel_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling interests</link:label>
    <link:label id="lab_us-gaap_NoncontrollingInterestMember_label_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling Interest [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncontrollingInterestMember" xlink:to="lab_us-gaap_NoncontrollingInterestMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_77447c12-ba27-4524-8620-2818ca55a8fc_negatedLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net income attributable to noncontrolling interests</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_b0ad9908-d2f5-4769-bc29-dffb480bd3e0_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Allocation of net income</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income (Loss) Attributable to Noncontrolling Interest</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:to="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_7362f072-2d77-46d6-8dce-4c3e5d3b29f5_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table]</link:label>
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    <link:label id="lab_us-gaap_UnsecuredDebtMember_efd9cdea-26cd-4e31-890b-4bbdcebd2b05_terseLabel_en-US" xlink:label="lab_us-gaap_UnsecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unsecured debt</link:label>
    <link:label id="lab_us-gaap_UnsecuredDebtMember_label_en-US" xlink:label="lab_us-gaap_UnsecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unsecured Debt [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnsecuredDebtMember" xlink:to="lab_us-gaap_UnsecuredDebtMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_RepaymentsOfNotesPayable_6e73c6bb-44a4-4d2b-85e1-7d56c6b41b51_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfNotesPayable" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Principal payment on notes payable</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfNotesPayable_34ad4fa9-13fa-42cb-adab-c58737b21c5e_terseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfNotesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Principal payments on notes payable</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfNotesPayable_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfNotesPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayments of Notes Payable</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfNotesPayable" xlink:to="lab_us-gaap_RepaymentsOfNotesPayable" xlink:type="arc" order="1"/>
    <link:label id="lab_o_ChildCare1Member_4f905112-c0ad-4a70-94e2-7e867f892124_terseLabel_en-US" xlink:label="lab_o_ChildCare1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Child care</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTable" xlink:to="lab_us-gaap_SubsequentEventTable" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_cf0c5b76-bc62-4bdf-9d45-8cc4cd02385b_terseLabel_en-US" xlink:label="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-cash activities</link:label>
    <link:label id="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:to="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_o_ReleasingCostsRecurringCapitalExpendituresAndNonRecurringBuildingImprovementsContingentPayments_3f4b899b-fd16-4ffb-b05f-9eb445dbb259_terseLabel_en-US" xlink:label="lab_o_ReleasingCostsRecurringCapitalExpendituresAndNonRecurringBuildingImprovementsContingentPayments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of commitments for re-leasing costs, recurring capital expenditures and non-recurring building improvements</link:label>
    <link:label id="lab_o_ReleasingCostsRecurringCapitalExpendituresAndNonRecurringBuildingImprovementsContingentPayments_label_en-US" xlink:label="lab_o_ReleasingCostsRecurringCapitalExpendituresAndNonRecurringBuildingImprovementsContingentPayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ReleasingCostsRecurringCapitalExpendituresAndNonRecurringBuildingImprovementsContingentPayments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_ReleasingCostsRecurringCapitalExpendituresAndNonRecurringBuildingImprovementsContingentPayments" xlink:href="o-20180930.xsd#o_ReleasingCostsRecurringCapitalExpendituresAndNonRecurringBuildingImprovementsContingentPayments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_ReleasingCostsRecurringCapitalExpendituresAndNonRecurringBuildingImprovementsContingentPayments" xlink:to="lab_o_ReleasingCostsRecurringCapitalExpendituresAndNonRecurringBuildingImprovementsContingentPayments" xlink:type="arc" order="1"/>
    <link:label id="lab_o_NotesPayableDueJanuary2021MemberMember_f7ca777f-c17f-4843-9db7-694f66f0e109_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueJanuary2021MemberMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.750% notes, issued in June 2010 and due in January 2021</link:label>
    <link:label id="lab_o_NotesPayableDueJanuary2021MemberMember_label_en-US" xlink:label="lab_o_NotesPayableDueJanuary2021MemberMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NotesPayableDueJanuary2021Member [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_NotesPayableDueJanuary2021MemberMember" xlink:href="o-20180930.xsd#o_NotesPayableDueJanuary2021MemberMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_NotesPayableDueJanuary2021MemberMember" xlink:to="lab_o_NotesPayableDueJanuary2021MemberMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_ImpairedPropertiesSoldNumber_1a0f0314-50cd-4927-9d33-2841ed3a16d8_terseLabel_en-US" xlink:label="lab_o_ImpairedPropertiesSoldNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of impaired properties sold</link:label>
    <link:label id="lab_o_ImpairedPropertiesSoldNumber_label_en-US" xlink:label="lab_o_ImpairedPropertiesSoldNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ImpairedPropertiesSoldNumber</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_ImpairedPropertiesSoldNumber" xlink:href="o-20180930.xsd#o_ImpairedPropertiesSoldNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_ImpairedPropertiesSoldNumber" xlink:to="lab_o_ImpairedPropertiesSoldNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_o_NumberOfPropertiesWithMortgages_5700bd25-755e-4983-b595-423c09a7621f_terseLabel_en-US" xlink:label="lab_o_NumberOfPropertiesWithMortgages" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of properties with mortgages</link:label>
    <link:label id="lab_o_NumberOfPropertiesWithMortgages_label_en-US" xlink:label="lab_o_NumberOfPropertiesWithMortgages" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NumberOfPropertiesWithMortgages</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_NumberOfPropertiesWithMortgages" xlink:href="o-20180930.xsd#o_NumberOfPropertiesWithMortgages"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_NumberOfPropertiesWithMortgages" xlink:to="lab_o_NumberOfPropertiesWithMortgages" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RealEstateOtherMember_591461d5-ac18-4a95-aa88-7c97aa8480d5_terseLabel_en-US" xlink:label="lab_us-gaap_RealEstateOtherMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_RealEstateOtherMember_f9d15fe4-674b-4d4d-acfb-084a8c0882cb_verboseLabel_en-US" xlink:label="lab_us-gaap_RealEstateOtherMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other revenue</link:label>
    <link:label id="lab_us-gaap_RealEstateOtherMember_label_en-US" xlink:label="lab_us-gaap_RealEstateOtherMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Real Estate, Other [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateOtherMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealEstateOtherMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateOtherMember" xlink:to="lab_us-gaap_RealEstateOtherMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_PartnershipUnitsIssued_eed948d3-2072-457f-a621-136a1475583e_terseLabel_en-US" xlink:label="lab_o_PartnershipUnitsIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of partnership units issued</link:label>
    <link:label id="lab_o_PartnershipUnitsIssued_label_en-US" xlink:label="lab_o_PartnershipUnitsIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PartnershipUnitsIssued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_PartnershipUnitsIssued" xlink:href="o-20180930.xsd#o_PartnershipUnitsIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_PartnershipUnitsIssued" xlink:to="lab_o_PartnershipUnitsIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_o_TenantReimbursementsMember_43aaebae-7a7a-40d7-b7b1-00bc40cce902_terseLabel_en-US" xlink:label="lab_o_TenantReimbursementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tenant reimbursements</link:label>
    <link:label id="lab_o_TenantReimbursementsMember_label_en-US" xlink:label="lab_o_TenantReimbursementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TenantReimbursementsMember</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_TenantReimbursementsMember" xlink:href="o-20180930.xsd#o_TenantReimbursementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_TenantReimbursementsMember" xlink:to="lab_o_TenantReimbursementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_SeniorUnsecuredNotesPayableDueJanuary2027Member_8a510567-22de-43d2-8d64-dcdce83b122e_terseLabel_en-US" xlink:label="lab_o_SeniorUnsecuredNotesPayableDueJanuary2027Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.000% notes, issued in October 2016 and due in January 2027</link:label>
    <link:label id="lab_o_SeniorUnsecuredNotesPayableDueJanuary2027Member_label_en-US" xlink:label="lab_o_SeniorUnsecuredNotesPayableDueJanuary2027Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SeniorUnsecuredNotesPayableDueJanuary2027Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_SeniorUnsecuredNotesPayableDueJanuary2027Member" xlink:href="o-20180930.xsd#o_SeniorUnsecuredNotesPayableDueJanuary2027Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_SeniorUnsecuredNotesPayableDueJanuary2027Member" xlink:to="lab_o_SeniorUnsecuredNotesPayableDueJanuary2027Member" xlink:type="arc" order="1"/>
    <link:label id="lab_o_PropertiesAcquiredRealEstateInvestmentsTextBlock_7a37d486-89f3-43b3-935e-2edcf5d53ab6_terseLabel_en-US" xlink:label="lab_o_PropertiesAcquiredRealEstateInvestmentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments in Real Estate</link:label>
    <link:label id="lab_o_PropertiesAcquiredRealEstateInvestmentsTextBlock_label_en-US" xlink:label="lab_o_PropertiesAcquiredRealEstateInvestmentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PropertiesAcquiredRealEstateInvestmentsTextBlock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_PropertiesAcquiredRealEstateInvestmentsTextBlock" xlink:href="o-20180930.xsd#o_PropertiesAcquiredRealEstateInvestmentsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_PropertiesAcquiredRealEstateInvestmentsTextBlock" xlink:to="lab_o_PropertiesAcquiredRealEstateInvestmentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_o_NotesPayableDueMarch2047SecondIssuanceDecember2017Member_63bcf39f-b240-4f29-ab7e-c9dfdce8f0c4_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueMarch2047SecondIssuanceDecember2017Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">4.650% notes, issued in December 2017 and due in March 2047</link:label>
    <link:label id="lab_o_NotesPayableDueMarch2047SecondIssuanceDecember2017Member_label_en-US" xlink:label="lab_o_NotesPayableDueMarch2047SecondIssuanceDecember2017Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NotesPayableDueMarch2047SecondIssuanceDecember2017Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_NotesPayableDueMarch2047SecondIssuanceDecember2017Member" xlink:href="o-20180930.xsd#o_NotesPayableDueMarch2047SecondIssuanceDecember2017Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_NotesPayableDueMarch2047SecondIssuanceDecember2017Member" xlink:to="lab_o_NotesPayableDueMarch2047SecondIssuanceDecember2017Member" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_AmendmentFlag_c1197903-918f-4ce3-a72a-2c0fb564580c_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_label_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_AmendmentFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag" xlink:to="lab_dei_AmendmentFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_o_PropertySalesCount_58a9dcae-ffd6-42b0-8bef-61b56b7acc0b_terseLabel_en-US" xlink:label="lab_o_PropertySalesCount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Properties sold</link:label>
    <link:label id="lab_o_PropertySalesCount_label_en-US" xlink:label="lab_o_PropertySalesCount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PropertySalesCount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_PropertySalesCount" xlink:href="o-20180930.xsd#o_PropertySalesCount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_PropertySalesCount" xlink:to="lab_o_PropertySalesCount" xlink:type="arc" order="1"/>
    <link:label id="lab_o_NotesPayableDueJanuary2018MemberMember_252cea49-fc88-4db4-adcb-ba9a2e27bcb9_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueJanuary2018MemberMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2.000% notes, issued in October 2012 and due in January 2018</link:label>
    <link:label id="lab_o_NotesPayableDueJanuary2018MemberMember_label_en-US" xlink:label="lab_o_NotesPayableDueJanuary2018MemberMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NotesPayableDueJanuary2018Member [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_NotesPayableDueJanuary2018MemberMember" xlink:href="o-20180930.xsd#o_NotesPayableDueJanuary2018MemberMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_NotesPayableDueJanuary2018MemberMember" xlink:to="lab_o_NotesPayableDueJanuary2018MemberMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_IncreaseDecreaseInMinorityInterestRollForward_b439ed87-918f-47bd-aaba-34fc5d7f2e39_verboseLabel_en-US" xlink:label="lab_o_IncreaseDecreaseInMinorityInterestRollForward" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in the carrying value of all noncontrolling interests</link:label>
    <link:label id="lab_o_IncreaseDecreaseInMinorityInterestRollForward_label_en-US" xlink:label="lab_o_IncreaseDecreaseInMinorityInterestRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Minority Interest [Roll Forward]</link:label>
    <link:label id="lab_o_IncreaseDecreaseInMinorityInterestRollForward_documentation_en-US" xlink:label="lab_o_IncreaseDecreaseInMinorityInterestRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US"></link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_IncreaseDecreaseInMinorityInterestRollForward" xlink:href="o-20180930.xsd#o_IncreaseDecreaseInMinorityInterestRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_IncreaseDecreaseInMinorityInterestRollForward" xlink:to="lab_o_IncreaseDecreaseInMinorityInterestRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsMiscellaneous_03b8f0aa-9de8-4412-ab5b-1be735c183fd_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsMiscellaneous" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other items</link:label>
    <link:label id="lab_us-gaap_OtherAssetsMiscellaneous_label_en-US" xlink:label="lab_us-gaap_OtherAssetsMiscellaneous" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets, Miscellaneous</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMiscellaneous" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsMiscellaneous"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsMiscellaneous" xlink:to="lab_us-gaap_OtherAssetsMiscellaneous" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsidiarySaleOfStockAxis_55add0f7-4da7-45d3-b8ef-40584b11f7f1_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of Stock [Axis]</link:label>
    <link:label id="lab_us-gaap_SubsidiarySaleOfStockAxis_label_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of Stock [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis" xlink:to="lab_us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_o_IncrementalCommonSharesAttributableToBusinessAcquisition_26e69a05-7a50-41a7-af18-b1bf9c668a9b_terseLabel_en-US" xlink:label="lab_o_IncrementalCommonSharesAttributableToBusinessAcquisition" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average partnership common units convertible to common shares that were dilutive</link:label>
    <link:label id="lab_o_IncrementalCommonSharesAttributableToBusinessAcquisition_label_en-US" xlink:label="lab_o_IncrementalCommonSharesAttributableToBusinessAcquisition" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">IncrementalCommonSharesAttributableToBusinessAcquisition</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_IncrementalCommonSharesAttributableToBusinessAcquisition" xlink:href="o-20180930.xsd#o_IncrementalCommonSharesAttributableToBusinessAcquisition"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_IncrementalCommonSharesAttributableToBusinessAcquisition" xlink:to="lab_o_IncrementalCommonSharesAttributableToBusinessAcquisition" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_VestingAxis_48e84467-3aeb-4d10-9a12-a56c4a7abce8_terseLabel_en-US" xlink:label="lab_us-gaap_VestingAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vesting [Axis]</link:label>
    <link:label id="lab_us-gaap_VestingAxis_label_en-US" xlink:label="lab_us-gaap_VestingAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vesting [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember"/>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityAbstract_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit Facility [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityAbstract"/>
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    <link:label id="lab_o_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanExpirationTerm_f1525b40-2fec-448b-8ebc-31c0362299b6_terseLabel_en-US" xlink:label="lab_o_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanExpirationTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan term from the date of adoption</link:label>
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    <link:label id="lab_dei_EntityCentralIndexKey_519eef79-c10f-4dfb-b92f-161e89294ace_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_6e01c53d-8dd7-4463-b84f-fbe0cd8ab36d_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable reference rate</link:label>
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    <link:label id="lab_us-gaap_PaymentsOfStockIssuanceCosts_16d8488e-b9ca-4b6c-b0f6-084418ff038e_verboseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfStockIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Underwriting discounts and offering costs</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromSaleOfRealEstate_9f479518-67a0-4966-b4d0-f381e218fa4c_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfRealEstate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from sales of real estate</link:label>
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    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_bf86a70d-2c00-4479-9fc1-a8c63b827e77_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance Sheet Location [Domain]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance Sheet Location [Domain]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationDomain" xlink:to="lab_us-gaap_BalanceSheetLocationDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_17048bd6-27af-4c34-a8c1-8375f4479cf6_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit facility borrowing capacity</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
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    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_e39b75d1-d4dd-44ef-a754-867ed7f94d8c_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock and paid in capital, shares authorized (in shares)</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesAuthorized" xlink:to="lab_us-gaap_CommonStockSharesAuthorized" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ProductsAndServicesDomain_474f6511-3a62-47be-992a-a31190f5396f_terseLabel_en-US" xlink:label="lab_srt_ProductsAndServicesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Product and Service [Domain]</link:label>
    <link:label id="lab_srt_ProductsAndServicesDomain_label_en-US" xlink:label="lab_srt_ProductsAndServicesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Product and Service [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductsAndServicesDomain" xlink:to="lab_srt_ProductsAndServicesDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PreferredStockTextBlock_9e3c2225-68ef-4b55-aa76-d6227673e8c2_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of Preferred Stock</link:label>
    <link:label id="lab_us-gaap_PreferredStockTextBlock_label_en-US" xlink:label="lab_us-gaap_PreferredStockTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock [Text Block]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockTextBlock" xlink:to="lab_us-gaap_PreferredStockTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_o_JointVentureOneMember_177c413e-b270-4014-a457-83081f3d0cc4_terseLabel_en-US" xlink:label="lab_o_JointVentureOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Joint Venture One</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_o_JointVentureOneMember" xlink:href="o-20180930.xsd#o_JointVentureOneMember"/>
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    <link:label id="lab_us-gaap_PreferredStockIncludingAdditionalPaidInCapitalAbstract_d1f6c647-cc2b-4194-bc4f-414b2a219ea7_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockIncludingAdditionalPaidInCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of Preferred Stock</link:label>
    <link:label id="lab_us-gaap_PreferredStockIncludingAdditionalPaidInCapitalAbstract_label_en-US" xlink:label="lab_us-gaap_PreferredStockIncludingAdditionalPaidInCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock, Including Additional Paid in Capital [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockIncludingAdditionalPaidInCapitalAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockIncludingAdditionalPaidInCapitalAbstract"/>
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    <link:label id="lab_o_VariableRateMortgagesMember_ecb0e2c3-2651-4583-8c5a-ab18196536ec_terseLabel_en-US" xlink:label="lab_o_VariableRateMortgagesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable rate mortgages</link:label>
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    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_VariableRateDomain_58484bd6-834b-4c70-aaca-9ad9d1d8f4cf_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate [Domain]</link:label>
    <link:label id="lab_us-gaap_VariableRateDomain_label_en-US" xlink:label="lab_us-gaap_VariableRateDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate [Domain]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateDomain" xlink:to="lab_us-gaap_VariableRateDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PayablesAndAccrualsAbstract_bb86c620-6cee-4b21-83e3-7bfea93f4750_terseLabel_en-US" xlink:label="lab_us-gaap_PayablesAndAccrualsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts payable and accrued expenses</link:label>
    <link:label id="lab_us-gaap_PayablesAndAccrualsAbstract_label_en-US" xlink:label="lab_us-gaap_PayablesAndAccrualsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payables and Accruals [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PayablesAndAccrualsAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract" xlink:to="lab_us-gaap_PayablesAndAccrualsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate_86774990-f855-4709-a980-482e3130f657_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment in real estate</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments to Acquire and Develop Real Estate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireAndDevelopRealEstate" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireAndDevelopRealEstate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireAndDevelopRealEstate" xlink:to="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate" xlink:type="arc" order="1"/>
    <link:label id="lab_o_ServicePeriodThreeMember_6438efca-5550-4b99-898c-482cd1c5bb17_terseLabel_en-US" xlink:label="lab_o_ServicePeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Three year vesting period</link:label>
    <link:label id="lab_o_ServicePeriodThreeMember_label_en-US" xlink:label="lab_o_ServicePeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ServicePeriodThreeMember</link:label>
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    <link:label id="lab_o_RealEstatePropertiesAcquiredLand_acfec895-ddd8-455e-9502-7e5845daf177_terseLabel_en-US" xlink:label="lab_o_RealEstatePropertiesAcquiredLand" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Allocated to land</link:label>
    <link:label id="lab_o_RealEstatePropertiesAcquiredLand_label_en-US" xlink:label="lab_o_RealEstatePropertiesAcquiredLand" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RealEstatePropertiesAcquiredLand</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_RealEstatePropertiesAcquiredLand" xlink:href="o-20180930.xsd#o_RealEstatePropertiesAcquiredLand"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_RealEstatePropertiesAcquiredLand" xlink:to="lab_o_RealEstatePropertiesAcquiredLand" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquity_efb0ebf7-0b0a-49b1-bafa-638d8156a138_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total stockholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' Equity Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity" xlink:to="lab_us-gaap_StockholdersEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssets_0e91ff86-8fed-4414-8fad-7e768f8a5289_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets, net</link:label>
    <link:label id="lab_us-gaap_OtherAssets_8726b9fd-ea87-4641-b5ca-50639d1471bf_totalLabel_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total other assets, net</link:label>
    <link:label id="lab_us-gaap_OtherAssets_label_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssets" xlink:to="lab_us-gaap_OtherAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_b59050ac-7cd2-4c7f-9d8c-0febfd4020ff_terseLabel_en-US" xlink:label="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of Revenue from Segments to Consolidated [Table]</link:label>
    <link:label id="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_label_en-US" xlink:label="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of Revenue from Segments to Consolidated [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:to="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NumberOfStatesInWhichEntityOperates_88b1e943-ba29-46bd-9bd2-6f9b1f7996a4_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfStatesInWhichEntityOperates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of U.S. states where properties are owned</link:label>
    <link:label id="lab_us-gaap_NumberOfStatesInWhichEntityOperates_label_en-US" xlink:label="lab_us-gaap_NumberOfStatesInWhichEntityOperates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of States in which Entity Operates</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfStatesInWhichEntityOperates" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NumberOfStatesInWhichEntityOperates"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfStatesInWhichEntityOperates" xlink:to="lab_us-gaap_NumberOfStatesInWhichEntityOperates" xlink:type="arc" order="1"/>
    <link:label id="lab_o_AcquiredPropertiesNumberOfIndustriesInWhichTenantsOperate_cca6a77c-e62b-42ff-9c1d-85413a1d8738_terseLabel_en-US" xlink:label="lab_o_AcquiredPropertiesNumberOfIndustriesInWhichTenantsOperate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of industries in which tenants operate</link:label>
    <link:label id="lab_o_AcquiredPropertiesNumberOfIndustriesInWhichTenantsOperate_label_en-US" xlink:label="lab_o_AcquiredPropertiesNumberOfIndustriesInWhichTenantsOperate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AcquiredPropertiesNumberOfIndustriesInWhichTenantsOperate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_AcquiredPropertiesNumberOfIndustriesInWhichTenantsOperate" xlink:href="o-20180930.xsd#o_AcquiredPropertiesNumberOfIndustriesInWhichTenantsOperate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_AcquiredPropertiesNumberOfIndustriesInWhichTenantsOperate" xlink:to="lab_o_AcquiredPropertiesNumberOfIndustriesInWhichTenantsOperate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PlanNameAxis_1b6fae43-b685-40b6-b4e8-2767692b5e29_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:label id="lab_us-gaap_PlanNameAxis_label_en-US" xlink:label="lab_us-gaap_PlanNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PlanNameAxis" xlink:to="lab_us-gaap_PlanNameAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_o_ScheduleOfAcquiredLeaseIntangibleAssetsTableTextBlock_c1b68535-e910-4bbe-8ac8-77d538ec0dd0_terseLabel_en-US" xlink:label="lab_o_ScheduleOfAcquiredLeaseIntangibleAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of acquired lease intangible assets, net</link:label>
    <link:label id="lab_o_ScheduleOfAcquiredLeaseIntangibleAssetsTableTextBlock_label_en-US" xlink:label="lab_o_ScheduleOfAcquiredLeaseIntangibleAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ScheduleOfAcquiredLeaseIntangibleAssetsTableTextBlock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_ScheduleOfAcquiredLeaseIntangibleAssetsTableTextBlock" xlink:href="o-20180930.xsd#o_ScheduleOfAcquiredLeaseIntangibleAssetsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_ScheduleOfAcquiredLeaseIntangibleAssetsTableTextBlock" xlink:to="lab_o_ScheduleOfAcquiredLeaseIntangibleAssetsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_o_DividendReinvestmentAndStockPurchasePlanAuthorizedShares_d16a913d-3cb2-4003-95ab-61039bddf13d_terseLabel_en-US" xlink:label="lab_o_DividendReinvestmentAndStockPurchasePlanAuthorizedShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Authorized common shares to be issued</link:label>
    <link:label id="lab_o_DividendReinvestmentAndStockPurchasePlanAuthorizedShares_label_en-US" xlink:label="lab_o_DividendReinvestmentAndStockPurchasePlanAuthorizedShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">DividendReinvestmentAndStockPurchasePlanAuthorizedShares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_DividendReinvestmentAndStockPurchasePlanAuthorizedShares" xlink:href="o-20180930.xsd#o_DividendReinvestmentAndStockPurchasePlanAuthorizedShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_DividendReinvestmentAndStockPurchasePlanAuthorizedShares" xlink:to="lab_o_DividendReinvestmentAndStockPurchasePlanAuthorizedShares" xlink:type="arc" order="1"/>
    <link:label id="lab_o_NotesPayableDueOctober2022FirstIssuanceOctober2012Member_b7d17601-262c-4b25-9110-9cec48501419_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueOctober2022FirstIssuanceOctober2012Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.250% notes, issued in October 2012 and due in October 2022</link:label>
    <link:label id="lab_o_NotesPayableDueOctober2022FirstIssuanceOctober2012Member_label_en-US" xlink:label="lab_o_NotesPayableDueOctober2022FirstIssuanceOctober2012Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NotesPayableDueOctober2022FirstIssuanceOctober2012Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_NotesPayableDueOctober2022FirstIssuanceOctober2012Member" xlink:href="o-20180930.xsd#o_NotesPayableDueOctober2022FirstIssuanceOctober2012Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_NotesPayableDueOctober2022FirstIssuanceOctober2012Member" xlink:to="lab_o_NotesPayableDueOctober2022FirstIssuanceOctober2012Member" xlink:type="arc" order="1"/>
    <link:label id="lab_o_ValueOfPropertyAcquiredWithEscrowFunds_ef68b85e-c531-471e-86f4-f0c9c91eafc4_terseLabel_en-US" xlink:label="lab_o_ValueOfPropertyAcquiredWithEscrowFunds" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value of property acquired with funds previously held in escrow account</link:label>
    <link:label id="lab_o_ValueOfPropertyAcquiredWithEscrowFunds_label_en-US" xlink:label="lab_o_ValueOfPropertyAcquiredWithEscrowFunds" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value Of Property Acquired With Escrow Funds</link:label>
    <link:label id="lab_o_ValueOfPropertyAcquiredWithEscrowFunds_documentation_en-US" xlink:label="lab_o_ValueOfPropertyAcquiredWithEscrowFunds" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value Of Property Acquired With Escrow Funds</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_ValueOfPropertyAcquiredWithEscrowFunds" xlink:href="o-20180930.xsd#o_ValueOfPropertyAcquiredWithEscrowFunds"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_ValueOfPropertyAcquiredWithEscrowFunds" xlink:to="lab_o_ValueOfPropertyAcquiredWithEscrowFunds" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentTypeCategorizationMember_3773878c-ee3f-48f2-a63e-dff8c49f2ea2_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments [Domain]</link:label>
    <link:label id="lab_us-gaap_InvestmentTypeCategorizationMember_label_en-US" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember" xlink:to="lab_us-gaap_InvestmentTypeCategorizationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ImpairmentOfRealEstate_84303e62-e7d6-4a6a-b378-1ece2865727b_verboseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfRealEstate" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provisions for impairment</link:label>
    <link:label id="lab_us-gaap_ImpairmentOfRealEstate_6e36caf9-de86-47db-8625-d7ca464c70ec_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfRealEstate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provisions for impairment on real estate</link:label>
    <link:label id="lab_us-gaap_ImpairmentOfRealEstate_label_en-US" xlink:label="lab_us-gaap_ImpairmentOfRealEstate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment of Real Estate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfRealEstate" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairmentOfRealEstate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairmentOfRealEstate" xlink:to="lab_us-gaap_ImpairmentOfRealEstate" xlink:type="arc" order="1"/>
    <link:label id="lab_o_VariableInterestEntityConsolidatedCarryingAmountNetRealEstate_d379ff17-64f9-4251-b044-d55254062c31_terseLabel_en-US" xlink:label="lab_o_VariableInterestEntityConsolidatedCarryingAmountNetRealEstate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net real estate</link:label>
    <link:label id="lab_o_VariableInterestEntityConsolidatedCarryingAmountNetRealEstate_label_en-US" xlink:label="lab_o_VariableInterestEntityConsolidatedCarryingAmountNetRealEstate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">VariableInterestEntityConsolidatedCarryingAmountNetRealEstate</link:label>
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    <link:label id="lab_o_RestaurantsQuickServiceMember_8d4990a8-09e1-479b-b751-16f55b087457_terseLabel_en-US" xlink:label="lab_o_RestaurantsQuickServiceMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restaurants-quick service</link:label>
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    <link:label id="lab_o_OtherAssetsDisclosureAbstract_b5298f88-0d1a-427e-bfee-a3e2438ab348_terseLabel_en-US" xlink:label="lab_o_OtherAssetsDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets, net</link:label>
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    <link:label id="lab_o_OtherAssetsDisclosureAbstract_documentation_en-US" xlink:label="lab_o_OtherAssetsDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US"></link:label>
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    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_6458c1fd-c45f-44e7-9876-47d53e146f84_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_e9885abe-61a8-4c89-8c1c-e2d7d41b216c_negatedLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unamortized premium balance</link:label>
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    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5723a593-0a7b-477e-86ec-2aed8b293c81_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
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    <link:label id="lab_us-gaap_CommonStockMember_d4579751-0ad9-405a-bcbb-ad1a7e821239_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember" xlink:to="lab_us-gaap_CommonStockMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_5d322b76-28e5-4c2f-b160-7c826e0e2e1f_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stated interest rate (as a percent)</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet_2e6604ca-c5d7-4d0d-8855-449e2baa24e9_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of debt</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet"/>
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    <link:label id="lab_o_StockIssuedDuringPeriodSharesDividendReinvestmentPlanAndStockPurchasePlan_257ea7d6-965e-4f51-801c-59ec6a190c70_terseLabel_en-US" xlink:label="lab_o_StockIssuedDuringPeriodSharesDividendReinvestmentPlanAndStockPurchasePlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of common shares issued</link:label>
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    <link:label id="lab_o_OtherCorporateAssets_936b8992-d930-48ac-be8d-bad203fa0fa2_terseLabel_en-US" xlink:label="lab_o_OtherCorporateAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other corporate assets</link:label>
    <link:label id="lab_o_OtherCorporateAssets_label_en-US" xlink:label="lab_o_OtherCorporateAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">OtherCorporateAssets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_OtherCorporateAssets" xlink:href="o-20180930.xsd#o_OtherCorporateAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_OtherCorporateAssets" xlink:to="lab_o_OtherCorporateAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_7b3270b8-9ffd-4df0-b0ec-700176ad9ca3_terseLabel_en-US" xlink:label="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Relationship to Entity [Domain]</link:label>
    <link:label id="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_label_en-US" xlink:label="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Relationship to Entity [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_o_AutomotiveTireServiceMember_f3765b83-b856-46fa-bda1-c090bc89ae50_terseLabel_en-US" xlink:label="lab_o_AutomotiveTireServiceMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Automotive tire services</link:label>
    <link:label id="lab_o_AutomotiveTireServiceMember_label_en-US" xlink:label="lab_o_AutomotiveTireServiceMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AutomotiveTireServiceMember</link:label>
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    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_69c8af59-901b-48e2-89e6-cebb1e531bc9_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Remaining balance of deferred financing costs at period end</link:label>
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_c31a746c-23a1-4b8f-aaf4-74d9e7d4090b_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred financing costs</link:label>
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_label_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Issuance Costs, Net</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredFinanceCostsNet" xlink:to="lab_us-gaap_DeferredFinanceCostsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_f2629273-1255-4bdc-bf48-74c6cc994a47_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-cash revenue adjustments</link:label>
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    <link:label id="lab_o_PropertiesUnderDevelopmentOrExpansionMember_ead8e08d-318e-4b44-86a4-458d80dbe845_terseLabel_en-US" xlink:label="lab_o_PropertiesUnderDevelopmentOrExpansionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Properties under development</link:label>
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    <link:label id="lab_o_ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlanAndStockPurchasePlanUnderWaiverApprovalProcess_1368e25a-17c1-40ad-9440-05175c087da7_verboseLabel_en-US" xlink:label="lab_o_ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlanAndStockPurchasePlanUnderWaiverApprovalProcess" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount raised from share issued under the waiver approval process</link:label>
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    <link:label id="lab_us-gaap_RestrictedStockMember_add269b5-dfbe-4c12-a407-1187c8138c67_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Stock</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Award [Domain]</link:label>
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    <link:label id="lab_o_UnvestedSharesMember_8904c324-9bea-4c02-9574-c3e9bd76fd66_terseLabel_en-US" xlink:label="lab_o_UnvestedSharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unvested Shares</link:label>
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    <link:label id="lab_us-gaap_NotesPayable_b9ee5845-4572-4dc4-adda-2a8b218045ba_terseLabel_en-US" xlink:label="lab_us-gaap_NotesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes payable, gross</link:label>
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    <link:label id="lab_o_AcquiredPropertiesPercentageByTypeOfRealEstate_b917c782-30b5-4ccc-a455-b6f056dc10ec_terseLabel_en-US" xlink:label="lab_o_AcquiredPropertiesPercentageByTypeOfRealEstate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property type-percentage of properties acquired</link:label>
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    <link:label id="lab_us-gaap_CommonStockDividendsPerShareCashPaid_2cfc33ca-302e-4548-b3d1-fc7de73152c6_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareCashPaid" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total common stock dividends paid per share (in dollars per share)</link:label>
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    <link:label id="lab_us-gaap_Land_8cff2bae-9efc-43d6-84e8-1e0ed897ce35_terseLabel_en-US" xlink:label="lab_us-gaap_Land" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Land</link:label>
    <link:label id="lab_us-gaap_Land_label_en-US" xlink:label="lab_us-gaap_Land" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Land</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Land" xlink:to="lab_us-gaap_Land" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_7251ebfc-3399-4dac-8eba-f95085931db3_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
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    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_4db88a78-719c-4e8b-9246-14a652ec297f_terseLabel_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Estimated fair value</link:label>
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    <link:label id="lab_o_NotesAndBondsPayableMember_b0647a17-c8f6-429c-8066-969708f5a14b_terseLabel_en-US" xlink:label="lab_o_NotesAndBondsPayableMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes and bonds payable</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromNotesPayable_bcb4e58e-2593-4fc9-93ce-a5925860e47c_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromNotesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from notes and bonds payable issued</link:label>
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    <link:label id="lab_o_DrugStoreMember_a16cc526-05f7-4a32-94ee-77c11a735a8a_terseLabel_en-US" xlink:label="lab_o_DrugStoreMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Drug stores</link:label>
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    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_4b75786b-a800-4b7f-afb2-7badb8935154_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Measurement Basis [Axis]</link:label>
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    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_b6140fd4-455a-408b-9845-c8bb539c926f_terseLabel_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock Incentive Plan</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:to="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:type="arc" order="1"/>
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    <link:label id="lab_o_NotesPayableDueApril2025MemberMember_10e86721-60a6-44f4-ae94-52f22a3c854d_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueApril2025MemberMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.875% notes, issued in April 2018 and due in April 2025</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfOtherAssetsTableTextBlock_51415aa7-3abd-484d-af83-83762d646692_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfOtherAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of other assets, net</link:label>
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    <link:label id="lab_o_WholesaleClubMember_6e748a10-71e4-4719-b1a4-dcc3a91be7ed_terseLabel_en-US" xlink:label="lab_o_WholesaleClubMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wholesale club</link:label>
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    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_1cb6d5f6-34fb-4a5f-9a94-cc3a975eb47c_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
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    <link:label id="lab_o_RealEstatePropertyInvestmentsNumberOfNewPropertiesAndPropertiesUnderDevelopment_261260ac-06d6-425b-afff-f856a0a88d93_terseLabel_en-US" xlink:label="lab_o_RealEstatePropertyInvestmentsNumberOfNewPropertiesAndPropertiesUnderDevelopment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of properties acquired during the period</link:label>
    <link:label id="lab_o_RealEstatePropertyInvestmentsNumberOfNewPropertiesAndPropertiesUnderDevelopment_label_en-US" xlink:label="lab_o_RealEstatePropertyInvestmentsNumberOfNewPropertiesAndPropertiesUnderDevelopment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RealEstatePropertyInvestmentsNumberOfNewPropertiesAndPropertiesUnderDevelopment</link:label>
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    <link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesMember_37e64034-8ec1-4e6f-a302-dce9cce7b2ef_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts payable and accrued expenses</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_95415b58-bbf4-4b92-aeac-42d74a50f794_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash provided by financing activities</link:label>
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    <link:label id="lab_o_TheaterMember_96c21374-3f43-4d0b-8c87-8918db52ce34_terseLabel_en-US" xlink:label="lab_o_TheaterMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Theaters</link:label>
    <link:label id="lab_o_TheaterMember_label_en-US" xlink:label="lab_o_TheaterMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TheaterMember</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_91138a7c-4e5e-4185-b849-a91f9ffd2f77_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash provided by operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
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    <link:label id="lab_us-gaap_ChiefExecutiveOfficerMember_9b3b56fd-8915-4495-a50b-b2bd4f3ddf65_terseLabel_en-US" xlink:label="lab_us-gaap_ChiefExecutiveOfficerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Chief Executive Officer</link:label>
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    <link:label id="lab_us-gaap_InvestmentTypeAxis_6c200a34-3f62-406c-8cb2-b6dbe4d90bd3_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Type [Axis]</link:label>
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    <link:label id="lab_o_AcquiredPropertiesLeasedPercentage_3b10a5f8-76f3-4ebd-ab26-69e0ac545907_terseLabel_en-US" xlink:label="lab_o_AcquiredPropertiesLeasedPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leased area (as a percent)</link:label>
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    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_b9208e49-03e6-4412-82a7-81d2a7a73150_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Remaining Principal Balance</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Gross</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount" xlink:to="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_54292af9-06b4-4845-8d08-de50cba9f9e5_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitment fee (as a percent)</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit Facility, Commitment Fee Percentage</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromInsuranceSettlementInvestingActivities_fe53a30d-0ce7-4da0-b0be-aebbeb52bceb_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromInsuranceSettlementInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Insurance proceeds received</link:label>
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    <link:label id="lab_us-gaap_EarningsPerShareBasicAndDiluted_84072df8-71ee-44c8-958b-5d6b5d290af1_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDiluted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net income, basic and diluted</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasicAndDiluted_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDiluted" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Per Share, Basic and Diluted</link:label>
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    <link:label id="lab_o_AutomotiveServicesMember_28ba6a46-d62d-434c-ad54-5d084ac8ff78_terseLabel_en-US" xlink:label="lab_o_AutomotiveServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Automotive service</link:label>
    <link:label id="lab_o_AutomotiveServicesMember_label_en-US" xlink:label="lab_o_AutomotiveServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AutomotiveServicesMember</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_AutomotiveServicesMember" xlink:href="o-20180930.xsd#o_AutomotiveServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_AutomotiveServicesMember" xlink:to="lab_o_AutomotiveServicesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_CommitmentsToCompleteConstructionInProgress_5cd3ef22-d39d-4452-8b96-e2985d555f36_terseLabel_en-US" xlink:label="lab_o_CommitmentsToCompleteConstructionInProgress" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of commitments for construction contracts, which is expected to be paid in next twelve months</link:label>
    <link:label id="lab_o_CommitmentsToCompleteConstructionInProgress_label_en-US" xlink:label="lab_o_CommitmentsToCompleteConstructionInProgress" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CommitmentsToCompleteConstructionInProgress</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_CommitmentsToCompleteConstructionInProgress" xlink:href="o-20180930.xsd#o_CommitmentsToCompleteConstructionInProgress"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_CommitmentsToCompleteConstructionInProgress" xlink:to="lab_o_CommitmentsToCompleteConstructionInProgress" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_c6b1165b-a4c0-4be4-86de-e7fff164bf3e_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Interest Entity, Consolidated, Carrying Amount, Liabilities</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities" xlink:to="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_fa7d8929-0e1a-42da-a661-7af7dc2100c0_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentLineItems" xlink:to="lab_us-gaap_DebtInstrumentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventMember_45b90405-b2d0-4a0f-af1d-51325b60b5ad_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent event</link:label>
    <link:label id="lab_us-gaap_SubsequentEventMember_label_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventMember" xlink:to="lab_us-gaap_SubsequentEventMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_d13899c8-f845-4b34-9d50-e687caa0e159_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership interest (as a percent)</link:label>
    <link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_label_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling Interest, Ownership Percentage by Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:to="lab_us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:type="arc" order="1"/>
    <link:label id="lab_o_NumberOfJointVentureInWhichControllingInterestAcquired_f250e33b-4704-4014-ad84-ae02bfad7fca_terseLabel_en-US" xlink:label="lab_o_NumberOfJointVentureInWhichControllingInterestAcquired" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of joint ventures controlling interest acquired</link:label>
    <link:label id="lab_o_NumberOfJointVentureInWhichControllingInterestAcquired_label_en-US" xlink:label="lab_o_NumberOfJointVentureInWhichControllingInterestAcquired" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NumberOfJointVentureInWhichControllingInterestAcquired</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_NumberOfJointVentureInWhichControllingInterestAcquired" xlink:href="o-20180930.xsd#o_NumberOfJointVentureInWhichControllingInterestAcquired"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_NumberOfJointVentureInWhichControllingInterestAcquired" xlink:to="lab_o_NumberOfJointVentureInWhichControllingInterestAcquired" xlink:type="arc" order="1"/>
    <link:label id="lab_o_InterestPayableAndInterestRateSwapCurrentAndNoncurrent_32bdffee-73b1-4ba4-a242-001a8b5f53b5_terseLabel_en-US" xlink:label="lab_o_InterestPayableAndInterestRateSwapCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mortgages, term loans, credit line - interest payable and interest rate swaps</link:label>
    <link:label id="lab_o_InterestPayableAndInterestRateSwapCurrentAndNoncurrent_label_en-US" xlink:label="lab_o_InterestPayableAndInterestRateSwapCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">InterestPayableAndInterestRateSwapCurrentAndNoncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_InterestPayableAndInterestRateSwapCurrentAndNoncurrent" xlink:href="o-20180930.xsd#o_InterestPayableAndInterestRateSwapCurrentAndNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_InterestPayableAndInterestRateSwapCurrentAndNoncurrent" xlink:to="lab_o_InterestPayableAndInterestRateSwapCurrentAndNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_o_TauOperatingPartnershipLPMember_18f879c0-eca6-4782-9e30-70cb9291a7b5_terseLabel_en-US" xlink:label="lab_o_TauOperatingPartnershipLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tau Operating Partnership</link:label>
    <link:label id="lab_o_TauOperatingPartnershipLPMember_label_en-US" xlink:label="lab_o_TauOperatingPartnershipLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TauOperatingPartnershipLPMember</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_TauOperatingPartnershipLPMember" xlink:href="o-20180930.xsd#o_TauOperatingPartnershipLPMember"/>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_a0392815-a7a7-43dc-87e0-f320323fcae1_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Five</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_f03024a9-303d-4008-a687-aef23556adc8_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and contingencies</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and Contingencies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies" xlink:to="lab_us-gaap_CommitmentsAndContingencies" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_3e1696c4-ccf9-43ba-8ecb-6eb368dbc8ad_terseLabel_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">LIBOR</link:label>
    <link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_label_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">London Interbank Offered Rate (LIBOR) [Member]</link:label>
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    <link:label id="lab_o_PercentagePriceToInvestor_6fcbfc97-0e07-4f53-9426-92c1941f9556_terseLabel_en-US" xlink:label="lab_o_PercentagePriceToInvestor" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Public offering price</link:label>
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    <link:label id="lab_us-gaap_Liabilities_2483adda-f669-44df-aad6-116644276fe5_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_label_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities" xlink:to="lab_us-gaap_Liabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_o_OtherCorporateAssetsNet_06bccb21-7de3-496d-8728-29e3d4feeab1_terseLabel_en-US" xlink:label="lab_o_OtherCorporateAssetsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporate assets, net</link:label>
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    <link:label id="lab_us-gaap_AssetImpairmentChargesAbstract_label_en-US" xlink:label="lab_us-gaap_AssetImpairmentChargesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Impairment Charges [Abstract]</link:label>
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    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfRedeemablePreferredStock_09e8baaa-ef09-4d8c-a5e4-af382281ddb5_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfRedeemablePreferredStock" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of preferred stock</link:label>
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    <link:label id="lab_dei_DocumentPeriodEndDate_be75dff3-ab73-4638-aacf-385513714a47_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentPeriodEndDate"/>
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    <link:label id="lab_o_NotesPayableDueOctober2026Member_bed59dfb-1bf6-48c6-a115-88f0c2135134_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueOctober2026Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">4.125% notes, $250 issued in September 2014 and $400 issued in March 2017, both due in October 2026</link:label>
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    <link:label id="lab_us-gaap_AccountsReceivableNet_3c3d9bbb-a7b2-4f67-91af-62ae66457e71_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts receivable, net</link:label>
    <link:label id="lab_us-gaap_AccountsReceivableNet_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Receivable, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsReceivableNet" xlink:to="lab_us-gaap_AccountsReceivableNet" xlink:type="arc" order="1"/>
    <link:label id="lab_o_VariableRateMortgagesAfterInterestRateArrangementsMember_79b0ccc4-60ef-4628-9381-1d458dc5ed2c_terseLabel_en-US" xlink:label="lab_o_VariableRateMortgagesAfterInterestRateArrangementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable rate mortgages after interest rate arrangements</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_o_VariableRateMortgagesAfterInterestRateArrangementsMember" xlink:href="o-20180930.xsd#o_VariableRateMortgagesAfterInterestRateArrangementsMember"/>
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    <link:label id="lab_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_33122a3f-85d0-4c82-a918-4bdee4f87b0f_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Supplemental Detail for Certain Components of Consolidated Balance Sheets</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock" xlink:to="lab_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AmortizationOfFinancingCosts_72945ba4-2c7d-444a-b688-399849dfbcbc_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amortization of deferred financing costs</link:label>
    <link:label id="lab_us-gaap_AmortizationOfFinancingCosts_label_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amortization of Debt Issuance Costs</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfFinancingCosts" xlink:to="lab_us-gaap_AmortizationOfFinancingCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestCostsCapitalized_3e9470d5-92a6-4c00-938e-34faf229d2be_terseLabel_en-US" xlink:label="lab_us-gaap_InterestCostsCapitalized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest capitalized to properties under development</link:label>
    <link:label id="lab_us-gaap_InterestCostsCapitalized_label_en-US" xlink:label="lab_us-gaap_InterestCostsCapitalized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Costs Capitalized</link:label>
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    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_cd12b591-b2c5-4684-bded-a4e3e8067e7a_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Credit Facility</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_UnsecuredDebtMaturingInMarch2024Member_62e58336-5701-4d9a-9f40-6b7593689f8d_terseLabel_en-US" xlink:label="lab_o_UnsecuredDebtMaturingInMarch2024Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">$250 million senior term loan due March 2024</link:label>
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    <link:label id="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecrease_b0811024-fd33-41c9-8dbd-681e9fd7660b_totalLabel_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Totals</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueAcquisitions_e0d683d3-1b8f-4da8-9c63-b39b17343a0c_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares issued in conjunction with acquisition</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsTextBlock" xlink:to="lab_us-gaap_SubsequentEventsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_o_PartnershipUnitsOutstanding_c5d9c72c-98d4-40fd-9396-bc3b490557fb_terseLabel_en-US" xlink:label="lab_o_PartnershipUnitsOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of partnership units outstanding</link:label>
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    <link:label id="lab_o_AmericanRealtyCapitalTrustIncMember_87f726a5-3623-4215-8a31-7467686c8539_terseLabel_en-US" xlink:label="lab_o_AmericanRealtyCapitalTrustIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ARCT</link:label>
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    <link:label id="lab_o_BondsPayableDueMarch2035FirstIssuanceMarch2005Member_283b74d8-cfa3-4baa-a2ed-6be3d016b063_terseLabel_en-US" xlink:label="lab_o_BondsPayableDueMarch2035FirstIssuanceMarch2005Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.875% bonds, issued in March 2005 and due in March 2035</link:label>
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    <link:label id="lab_o_NotesPayableDueJuly2024MemberMember_cd85f7fb-ae61-42b7-80b1-826478eb455d_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueJuly2024MemberMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.875% notes, issued in June 2014 and due in July 2024</link:label>
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    <link:label id="lab_us-gaap_DirectorMember_e82ee1a4-5aa5-4896-ad9b-4f0faa969e96_terseLabel_en-US" xlink:label="lab_us-gaap_DirectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Directors</link:label>
    <link:label id="lab_us-gaap_DirectorMember_label_en-US" xlink:label="lab_us-gaap_DirectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Director [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DirectorMember" xlink:to="lab_us-gaap_DirectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_c2002869-3d3f-4e47-a34a-fb1672b2fc3e_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock, dividends declared (in dollars per share)</link:label>
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    <link:label id="lab_o_HomeImprovementMember_e9f5dccb-1b1c-4b0a-bf83-b2877c856d66_terseLabel_en-US" xlink:label="lab_o_HomeImprovementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Home improvement</link:label>
    <link:label id="lab_o_HomeImprovementMember_label_en-US" xlink:label="lab_o_HomeImprovementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">HomeImprovementMember</link:label>
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    <link:label id="lab_us-gaap_RevenuesAbstract_99141cdb-c68e-4e50-a594-8b78c6346e2e_terseLabel_en-US" xlink:label="lab_us-gaap_RevenuesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">REVENUE</link:label>
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    <link:label id="lab_o_RealEstatePropertiesAcquiredBuildingsAndImprovements_a48fcb94-fa7d-4acb-81d6-e98bc6167a4f_terseLabel_en-US" xlink:label="lab_o_RealEstatePropertiesAcquiredBuildingsAndImprovements" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Allocated to buildings and improvements</link:label>
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    <link:label id="lab_us-gaap_Assets_94d1e623-8e93-45e8-8d0d-b46c8b6fd118_totalLabel_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total assets</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets" xlink:to="lab_us-gaap_Assets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RealEstateInvestmentPropertyAtCost_21d0cafc-b9c7-4c1d-9a00-fca3d500e7ef_totalLabel_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentPropertyAtCost" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total real estate, at cost</link:label>
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    <link:label id="lab_us-gaap_ProfitLoss_3c2c9200-9536-44a1-b904-2a18e4c4f91f_totalLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net income</link:label>
    <link:label id="lab_us-gaap_ProfitLoss_6fa457a7-e675-42af-8873-3c7905f1cb9f_terseLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net income</link:label>
    <link:label id="lab_us-gaap_ProfitLoss_15f453ec-4980-4310-8f47-8593ed97b3b4_verboseLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net income</link:label>
    <link:label id="lab_us-gaap_ProfitLoss_label_en-US" xlink:label="lab_us-gaap_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss" xlink:to="lab_us-gaap_ProfitLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PlanNameDomain_6b2193a1-0248-4cd5-a2ed-87f3dee842c9_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Domain]</link:label>
    <link:label id="lab_us-gaap_PlanNameDomain_label_en-US" xlink:label="lab_us-gaap_PlanNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameDomain"/>
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    <link:label id="lab_us-gaap_NoncontrollingInterestAbstract_label_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling Interest [Abstract]</link:label>
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    <link:label id="lab_o_RealtyIncomeLPMember_f2d76adf-14af-4e95-930d-f35959b75e75_terseLabel_en-US" xlink:label="lab_o_RealtyIncomeLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Realty Income, L.P.</link:label>
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    <link:label id="lab_dei_DocumentFiscalPeriodFocus_190e8d57-1578-4401-b414-8978d11b357a_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Period Focus</link:label>
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    <link:label id="lab_dei_DocumentType_d939acfa-bffa-4f2e-80c2-e3a5f607ed0a_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
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    <link:label id="lab_o_ImpairedPropertiesHeldForInvestmentNumber_4508c4f6-15fc-4b15-90ca-2d9ffafb7e94_terseLabel_en-US" xlink:label="lab_o_ImpairedPropertiesHeldForInvestmentNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of impaired properties held-for-investment</link:label>
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    <link:label id="lab_us-gaap_StockRedeemedOrCalledDuringPeriodShares_68c3c202-7d90-455f-81e5-6e51d5bacded_terseLabel_en-US" xlink:label="lab_us-gaap_StockRedeemedOrCalledDuringPeriodShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred stock redeemed</link:label>
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    <link:label id="lab_us-gaap_SegmentReportingAssetReconcilingItemLineItems_8fc7cf68-c86a-45bb-8760-e4f593b3c5f4_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingAssetReconcilingItemLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of assets from segment to consolidated</link:label>
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    <link:label id="lab_us-gaap_IncomeStatementAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="lab_us-gaap_IncomeStatementAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_o_NotesPayableDueOctober2022MemberMember_8b3969e5-ee6e-41c6-a130-5ed4d1f975b5_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueOctober2022MemberMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.250% notes, $450 issued in October 2012 and $500 issued in December 2017, both due in October 2022</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable_415fa354-5b1d-4fea-9f14-dcf15cbff8a5_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Variable Interest Entities [Table]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
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    <link:label id="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseAfterYearFive_df3d3e26-754c-498a-9529-094200ad5395_terseLabel_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseAfterYearFive" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Thereafter</link:label>
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    <link:label id="lab_o_DebtInstrumentNumberRepaid_d3560e16-ba71-4cb2-973e-b78ca8cc72b5_terseLabel_en-US" xlink:label="lab_o_DebtInstrumentNumberRepaid" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of mortgages repaid</link:label>
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    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_5530f301-e097-4b00-b054-43e1c5931645_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation and amortization expense</link:label>
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_label_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amortization of Intangible Assets</link:label>
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    <link:label id="lab_o_RealEstatePropertyInvestmentsNumberOfInvestmentsThatCausedAnyOneTenantToBeTenPercentOrMoreOfTotalAssets_46f34283-ced8-45a9-918d-fd5f663c556e_terseLabel_en-US" xlink:label="lab_o_RealEstatePropertyInvestmentsNumberOfInvestmentsThatCausedAnyOneTenantToBeTenPercentOrMoreOfTotalAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of investments in properties that caused any tenant to be 10% of more of total assets</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_o_RealEstatePropertyInvestmentsNumberOfInvestmentsThatCausedAnyOneTenantToBeTenPercentOrMoreOfTotalAssets" xlink:href="o-20180930.xsd#o_RealEstatePropertyInvestmentsNumberOfInvestmentsThatCausedAnyOneTenantToBeTenPercentOrMoreOfTotalAssets"/>
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    <link:label id="lab_us-gaap_PreferredStockDividendsPerShareCashPaid_395c5433-714b-4be0-8ca6-39d3e5641f45_verboseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockDividendsPerShareCashPaid" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends paid per preferred share</link:label>
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    <link:label id="lab_us-gaap_NumberOfOperatingSegments_939598b1-eb12-44f2-9346-9b4a2eb73692_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of activity segments</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_e6d0e2f0-9de4-47ef-bfc2-56ef07d9151f_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
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    <link:label id="lab_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_089ed78e-6188-485c-9faa-a2d9f2bfa63b_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of Common Stock</link:label>
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    <link:label id="lab_o_BondsPayableDueMarch2035MemberMember_2383ead5-c8c3-432c-a68b-cfe002b636a1_terseLabel_en-US" xlink:label="lab_o_BondsPayableDueMarch2035MemberMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.875% bonds, $100 issued in March 2005 and $150 issued in June 2011, both due in March 2035</link:label>
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    <link:label id="lab_o_ReallocationOfEquity_51d16b0d-61e7-4182-80dd-2d3d06c2b6ec_terseLabel_en-US" xlink:label="lab_o_ReallocationOfEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reallocation of equity</link:label>
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    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_d0fc2861-04d6-4887-afed-923a14adba0d_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net increase in cash, cash equivalents and restricted cash</link:label>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_fde30c9e-eb73-4a8d-91fe-58d4bd258279_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2021</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
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    <link:label id="lab_us-gaap_DividendsPayableTable_70d67439-43a2-4288-a535-0713a471e271_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends Payable [Table]</link:label>
    <link:label id="lab_us-gaap_DividendsPayableTable_label_en-US" xlink:label="lab_us-gaap_DividendsPayableTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends Payable [Table]</link:label>
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    <link:label id="lab_o_UnsecuredDebtMaturingOn21January2018Member_32b46fb8-1601-49db-a7d0-1adcdf2fddad_terseLabel_en-US" xlink:label="lab_o_UnsecuredDebtMaturingOn21January2018Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">$70 million senior term loan due January 2018</link:label>
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    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_c760181d-4933-4e58-8ba8-c53a5cf541c7_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and administrative</link:label>
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_label_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and Administrative Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
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    <link:label id="lab_o_PropertiesNewMember_4221c096-4ffa-4248-8b94-8aa381d7c5b9_terseLabel_en-US" xlink:label="lab_o_PropertiesNewMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New properties</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_12bfe1a1-2849-47a6-8c1f-cca9ada3a199_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment, Type [Domain]</link:label>
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    <link:label id="lab_o_NotesPayableDueOctober2022SecondIssuanceDecember2017Member_bf19166d-587d-4847-998f-c927688708ba_terseLabel_en-US" xlink:label="lab_o_NotesPayableDueOctober2022SecondIssuanceDecember2017Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.250% notes, issued in December 2017 and due in October 2022</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_81620a10-5504-428b-a543-085171669a6d_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Face amount of notes</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_1f6d3c7b-1dbb-4eba-b42f-7491555c889e_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total liabilities and equity</link:label>
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    <link:label id="lab_us-gaap_RealEstateInvestmentPropertyNet_f03ed041-96bd-4d10-b0db-7298cd009c4e_totalLabel_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentPropertyNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net real estate held for investment</link:label>
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    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_00fb297d-f0ea-451c-a78e-8f7b86aa3f87_terseLabel_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Components [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis" xlink:to="lab_us-gaap_StatementEquityComponentsAxis" xlink:type="arc" order="1"/>
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    <link:label id="lab_o_VariableInterestEntityConsolidatedCarryingAmountDebt_eecc9780-3d3a-4d51-967d-a206519fb9af_terseLabel_en-US" xlink:label="lab_o_VariableInterestEntityConsolidatedCarryingAmountDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total debt</link:label>
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    <link:label id="lab_us-gaap_VariableRateAxis_91604143-205d-498e-9803-b8389b91a8c8_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate [Axis]</link:label>
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    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_f089118b-295d-4ace-ac0d-8f67bb3189d1_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets</link:label>
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    <link:label id="lab_o_CumulativeRedeemablePreferredStockClassFMember_d434e021-4959-4b5b-944c-1a9dfc258738_terseLabel_en-US" xlink:label="lab_o_CumulativeRedeemablePreferredStockClassFMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class F Preferred Stock</link:label>
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    <link:label id="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseAbstract_2b9ab296-94c7-428d-b510-bb38db3d383e_terseLabel_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net decrease to rental revenue</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfStockByClassTextBlock_a0c5792f-94c0-4427-9518-5ca6e2703f41_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfStockByClassTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of monthly distributions paid</link:label>
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    <link:label id="lab_o_ScheduleOfMinorityInterestRollForwardTableTextBlock_221892c6-f059-4faa-983c-a305df2a73ae_terseLabel_en-US" xlink:label="lab_o_ScheduleOfMinorityInterestRollForwardTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of the change in the carrying value of all noncontrolling interests</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxesPaid_dcf27d30-6192-481b-8ac8-e138133af7bb_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash paid for income taxes</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaid" xlink:to="lab_us-gaap_IncomeTaxesPaid" xlink:type="arc" order="1"/>
    <link:label id="lab_o_FiniteLivedIntangibleAssetsAmortizationExpenseIncreaseDecreaseAbstract_04c5d84c-d653-4850-9ec0-2f3d4a17c027_terseLabel_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsAmortizationExpenseIncreaseDecreaseAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase to amortization expense</link:label>
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    <link:label id="lab_o_ProceedsFromDividendReinvestmentAndStockPurchasePlanNet_5923aac3-a89a-4c6e-80ac-27deb580da06_terseLabel_en-US" xlink:label="lab_o_ProceedsFromDividendReinvestmentAndStockPurchasePlanNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from dividend reinvestment and stock purchase plan</link:label>
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    <link:label id="lab_o_ApparelMember_7f44bee5-c3b3-42d8-9176-9e8a6f0381d7_terseLabel_en-US" xlink:label="lab_o_ApparelMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Apparel</link:label>
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    <link:label id="lab_o_SeniorUnsecuredNotesPayableDue2028MemberMember_f34cce61-2d56-4b73-9677-c1a766ee312a_terseLabel_en-US" xlink:label="lab_o_SeniorUnsecuredNotesPayableDue2028MemberMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.650% notes, issued in December 2017 and due in January 2028</link:label>
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    <link:label id="lab_dei_EntitySmallBusiness_d1a191cd-d769-45cd-b96a-dc0af5157fae_terseLabel_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Small Business</link:label>
    <link:label id="lab_dei_EntitySmallBusiness_label_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Small Business</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntitySmallBusiness"/>
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    <link:label id="lab_o_ServicePeriodTwoMember_0d2caee3-8e67-444b-ae1b-24943a3c8110_terseLabel_en-US" xlink:label="lab_o_ServicePeriodTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Two year vesting period</link:label>
    <link:label id="lab_o_ServicePeriodTwoMember_label_en-US" xlink:label="lab_o_ServicePeriodTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ServicePeriodTwoMember</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_ServicePeriodTwoMember" xlink:href="o-20180930.xsd#o_ServicePeriodTwoMember"/>
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    <link:label id="lab_us-gaap_AllOtherSegmentsMember_c952e18c-a3be-4c0a-a15c-47afc9085d13_terseLabel_en-US" xlink:label="lab_us-gaap_AllOtherSegmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other non-reportable segments</link:label>
    <link:label id="lab_us-gaap_AllOtherSegmentsMember_label_en-US" xlink:label="lab_us-gaap_AllOtherSegmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Segments [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllOtherSegmentsMember" xlink:to="lab_us-gaap_AllOtherSegmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity_d11e9cac-6046-45ed-8bd7-e981ca18f2c4_terseLabel_en-US" xlink:label="lab_o_LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accordion expansion option</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_o_LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity" xlink:href="o-20180930.xsd#o_LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity" xlink:to="lab_o_LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity" xlink:type="arc" order="1"/>
    <link:label id="lab_o_OtherNoncontrollingInterestsMember_a05452cb-35bf-4723-b590-c19e48f0779f_terseLabel_en-US" xlink:label="lab_o_OtherNoncontrollingInterestsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Noncontrolling Interests</link:label>
    <link:label id="lab_o_OtherNoncontrollingInterestsMember_label_en-US" xlink:label="lab_o_OtherNoncontrollingInterestsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">OtherNoncontrollingInterestsMember</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_OtherNoncontrollingInterestsMember" xlink:href="o-20180930.xsd#o_OtherNoncontrollingInterestsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_OtherNoncontrollingInterestsMember" xlink:to="lab_o_OtherNoncontrollingInterestsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_AmendedCreditFacilityMember_2be192e8-5641-4b24-9630-d4085e3a1edf_terseLabel_en-US" xlink:label="lab_o_AmendedCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amended Credit Facility</link:label>
    <link:label id="lab_o_AmendedCreditFacilityMember_label_en-US" xlink:label="lab_o_AmendedCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amended Credit Facility [Member]</link:label>
    <link:label id="lab_o_AmendedCreditFacilityMember_documentation_en-US" xlink:label="lab_o_AmendedCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Realty Income Corp. Amended Credit Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_AmendedCreditFacilityMember" xlink:href="o-20180930.xsd#o_AmendedCreditFacilityMember"/>
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    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_3d85ae18-d020-4292-9009-7596c90f20aa_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and Contingencies</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationLiability_cf620b3c-1f8a-4699-bfc8-a80c689ea7a6_verboseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent consideration associated with acquisition</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationLiability_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combination, Contingent Consideration, Liability</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:to="lab_us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentTerm_bc4ad905-4d54-4927-9fce-ac81e1a2c9c9_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Remaining Years Until Maturity</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentTerm_bfd81261-01d1-4f63-914e-ac0c2a5a7887_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average remaining years until maturity</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentTerm_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentTerm" xlink:to="lab_us-gaap_DebtInstrumentTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_o_FiniteLivedIntangibleLiabilitiesAcquiredLeaseNetAbstract_5aa76cac-dae5-438e-8ebd-d63a166cd740_terseLabel_en-US" xlink:label="lab_o_FiniteLivedIntangibleLiabilitiesAcquiredLeaseNetAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquired lease intangible liabilities, net</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_o_FiniteLivedIntangibleLiabilitiesAcquiredLeaseNetAbstract" xlink:href="o-20180930.xsd#o_FiniteLivedIntangibleLiabilitiesAcquiredLeaseNetAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_FiniteLivedIntangibleLiabilitiesAcquiredLeaseNetAbstract" xlink:to="lab_o_FiniteLivedIntangibleLiabilitiesAcquiredLeaseNetAbstract" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_617da31d-30e3-4d6e-b474-1c4dc91f39de_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_label_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation, Depletion and Amortization</link:label>
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    <link:label id="lab_us-gaap_PrepaidExpenseCurrentAndNoncurrent_325d984f-802c-4b28-aa57-7cbca73a1560_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Prepaid expenses</link:label>
    <link:label id="lab_us-gaap_PrepaidExpenseCurrentAndNoncurrent_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Prepaid Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseCurrentAndNoncurrent"/>
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    <link:label id="lab_o_EarningsPerShareLineItems_d338dd87-dce9-4a38-b7cb-956c374194b0_terseLabel_en-US" xlink:label="lab_o_EarningsPerShareLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income per Common Share</link:label>
    <link:label id="lab_o_EarningsPerShareLineItems_label_en-US" xlink:label="lab_o_EarningsPerShareLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Per Share [Line Items]</link:label>
    <link:label id="lab_o_EarningsPerShareLineItems_documentation_en-US" xlink:label="lab_o_EarningsPerShareLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US"></link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityLineItems_c73c7dd6-36c2-4d72-9b7e-b7b6fd4a1b7b_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit facility</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityLineItems_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit Facility [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems" xlink:to="lab_us-gaap_LineOfCreditFacilityLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_o_UnsecuredDebtMaturingOn30June2020Member_fcc532e7-9106-493e-9585-23da0a8c363b_terseLabel_en-US" xlink:label="lab_o_UnsecuredDebtMaturingOn30June2020Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">$250 million senior term loan due June 2020</link:label>
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    <link:label id="lab_us-gaap_OtherNotesPayable_baae81d5-2df1-4559-8897-f0be4a8e5316_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNotesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mortgages payable, net</link:label>
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    <link:label id="lab_o_GeneralMerchandiseMember_938019f5-667e-4ad8-9926-8fbce3723958_terseLabel_en-US" xlink:label="lab_o_GeneralMerchandiseMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General merchandise</link:label>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_256f9961-a2c5-4893-8472-d0601b64cdfd_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PreferredStockRedemptionPricePerShare_2d516499-cb54-426c-9b8f-01f19e27f6ba_verboseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockRedemptionPricePerShare" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred stock, redemption price per share (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_PreferredStockRedemptionPricePerShare_label_en-US" xlink:label="lab_us-gaap_PreferredStockRedemptionPricePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock, Redemption Price Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockRedemptionPricePerShare" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockRedemptionPricePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockRedemptionPricePerShare" xlink:to="lab_us-gaap_PreferredStockRedemptionPricePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventLineItems_f4a01ccc-33fe-4098-a9f3-3f57ced1ec9f_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent events</link:label>
    <link:label id="lab_us-gaap_SubsequentEventLineItems_label_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventLineItems" xlink:to="lab_us-gaap_SubsequentEventLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MinimumMember_5e8b2f1a-c187-483a-b9ac-871471ae5517_terseLabel_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember" xlink:to="lab_srt_MinimumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LeasesAcquiredInPlaceMember_af04984f-41a1-4863-ab92-c2308b195808_terseLabel_en-US" xlink:label="lab_us-gaap_LeasesAcquiredInPlaceMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">In-Place Leases</link:label>
    <link:label id="lab_us-gaap_LeasesAcquiredInPlaceMember_label_en-US" xlink:label="lab_us-gaap_LeasesAcquiredInPlaceMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases, Acquired-in-Place [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAcquiredInPlaceMember" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LeasesAcquiredInPlaceMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeasesAcquiredInPlaceMember" xlink:to="lab_us-gaap_LeasesAcquiredInPlaceMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_ReLeasingCosts_e1b34de6-30bc-4af9-b531-a1f8bbd2a216_terseLabel_en-US" xlink:label="lab_o_ReLeasingCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Re-leasing costs</link:label>
    <link:label id="lab_o_ReLeasingCosts_label_en-US" xlink:label="lab_o_ReLeasingCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ReLeasingCosts</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_ReLeasingCosts" xlink:href="o-20180930.xsd#o_ReLeasingCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_ReLeasingCosts" xlink:to="lab_o_ReLeasingCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_dcf14f29-502f-487e-9088-16d26ad852c0_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Maturities, Repayments of Principal in Year Five</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:type="arc" order="1"/>
    <link:label id="lab_o_SeniorUnsecuredTermLoansMember_279c5d5e-7567-4349-895d-727d608c3a09_terseLabel_en-US" xlink:label="lab_o_SeniorUnsecuredTermLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Senior Unsecured Term Loans</link:label>
    <link:label id="lab_o_SeniorUnsecuredTermLoansMember_label_en-US" xlink:label="lab_o_SeniorUnsecuredTermLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SeniorUnsecuredTermLoans [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_SeniorUnsecuredTermLoansMember" xlink:href="o-20180930.xsd#o_SeniorUnsecuredTermLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_SeniorUnsecuredTermLoansMember" xlink:to="lab_o_SeniorUnsecuredTermLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_o_FinancialServicesMember_d79b2553-3ccf-4e6a-a0b4-53183e292ae7_terseLabel_en-US" xlink:label="lab_o_FinancialServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial services</link:label>
    <link:label id="lab_o_FinancialServicesMember_label_en-US" xlink:label="lab_o_FinancialServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">FinancialServices [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_FinancialServicesMember" xlink:href="o-20180930.xsd#o_FinancialServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_FinancialServicesMember" xlink:to="lab_o_FinancialServicesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CreditFacilityAxis_85de76e9-01c9-4bbe-9e6d-91139e640bba_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityAxis_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityAxis" xlink:to="lab_us-gaap_CreditFacilityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_o_DividendReinvestmentAndStockPurchasePlanAbstract_9709ad6a-db57-4426-b688-22e93d4b45b7_terseLabel_en-US" xlink:label="lab_o_DividendReinvestmentAndStockPurchasePlanAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividend Reinvestment and Stock Purchase Plan</link:label>
    <link:label id="lab_o_DividendReinvestmentAndStockPurchasePlanAbstract_label_en-US" xlink:label="lab_o_DividendReinvestmentAndStockPurchasePlanAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividend Reinvestment and Stock Purchase Plan</link:label>
    <link:label id="lab_o_DividendReinvestmentAndStockPurchasePlanAbstract_documentation_en-US" xlink:label="lab_o_DividendReinvestmentAndStockPurchasePlanAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">No definition available.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_DividendReinvestmentAndStockPurchasePlanAbstract" xlink:href="o-20180930.xsd#o_DividendReinvestmentAndStockPurchasePlanAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_DividendReinvestmentAndStockPurchasePlanAbstract" xlink:to="lab_o_DividendReinvestmentAndStockPurchasePlanAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_o_NotesPayablesIssuedInMarch2017Member_2aef530c-fd33-48f0-ba97-0a86e232f3da_terseLabel_en-US" xlink:label="lab_o_NotesPayablesIssuedInMarch2017Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes issued in March 2017</link:label>
    <link:label id="lab_o_NotesPayablesIssuedInMarch2017Member_label_en-US" xlink:label="lab_o_NotesPayablesIssuedInMarch2017Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NotesPayablesIssuedInMarch2017Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_NotesPayablesIssuedInMarch2017Member" xlink:href="o-20180930.xsd#o_NotesPayablesIssuedInMarch2017Member"/>
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    <link:label id="lab_us-gaap_MinorityInterestLineItems_da0347c3-a683-4d91-ba9e-199492e4b767_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling interests</link:label>
    <link:label id="lab_us-gaap_MinorityInterestLineItems_label_en-US" xlink:label="lab_us-gaap_MinorityInterestLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling Interest [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterestLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestLineItems" xlink:to="lab_us-gaap_MinorityInterestLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo_7ced7309-6547-4778-9d27-55fff1dd2565_terseLabel_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2019</link:label>
    <link:label id="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo_label_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo" xlink:href="o-20180930.xsd#o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo" xlink:to="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo" xlink:type="arc" order="1"/>
    <link:label id="lab_o_RealEstatePropertiesAcquiredIntangibleAssets_398468e2-6340-40dd-b419-2af49e8accfc_terseLabel_en-US" xlink:label="lab_o_RealEstatePropertiesAcquiredIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Allocated to intangible assets related to leases</link:label>
    <link:label id="lab_o_RealEstatePropertiesAcquiredIntangibleAssets_label_en-US" xlink:label="lab_o_RealEstatePropertiesAcquiredIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RealEstatePropertiesAcquiredIntangibleAssets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_RealEstatePropertiesAcquiredIntangibleAssets" xlink:href="o-20180930.xsd#o_RealEstatePropertiesAcquiredIntangibleAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_RealEstatePropertiesAcquiredIntangibleAssets" xlink:to="lab_o_RealEstatePropertiesAcquiredIntangibleAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour_e4c0ec12-3a59-412d-acbf-49c033ef15f5_terseLabel_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2021</link:label>
    <link:label id="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour_label_en-US" xlink:label="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour" xlink:href="o-20180930.xsd#o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour" xlink:to="lab_o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsPayableAmountPerShare_fb0e1604-7923-415e-ad45-902abbd5e472_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableAmountPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Monthly distributions payable (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_DividendsPayableAmountPerShare_label_en-US" xlink:label="lab_us-gaap_DividendsPayableAmountPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends Payable, Amount Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableAmountPerShare" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableAmountPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableAmountPerShare" xlink:to="lab_us-gaap_DividendsPayableAmountPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_1588bd94-d5dc-4d38-afa0-f1e6cf4e7fd5_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash distributions to common stockholders</link:label>
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