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    <link:label id="lab_us-gaap_RangeAxis_DF50D2173CC854C0E8A776646E9041FC_label_en-US" xlink:label="lab_us-gaap_RangeAxis_CD621CA3A434528EA813FB174755F5DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range [Axis]</link:label>
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    <link:label id="lab_us-gaap_MinimumMember_75C5B47FF3711DB0B6FF76646E9200A4_label_en-US" xlink:label="lab_us-gaap_MinimumMember_6A4ED0577F915CC1A3B506BF9C24613C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
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    <link:label id="lab_us-gaap_MaximumMember_5B32FF873D004EECD4CD76646E92FA04_label_en-US" xlink:label="lab_us-gaap_MaximumMember_1D8E30BE1881562590626C6DA7F61507" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum [Member]</link:label>
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    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_2D1FE7AA1891FC5A8E1676646E92A336_label_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_955DCF8249F25F558AF7E46D4A6513B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Category of Item Purchased [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_955DCF8249F25F558AF7E46D4A6513B3" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InventoriesMember_8BEAF6D0DDC6D736EEB676646E92C6CA_terseLabel_en-US" xlink:label="lab_us-gaap_InventoriesMember_94DF3841A6145CB8BBE6DE40CAAE40D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Natural gas purchases</link:label>
    <link:label id="lab_us-gaap_InventoriesMember_8BEAF6D0DDC6D736EEB676646E92C6CA_label_en-US" xlink:label="lab_us-gaap_InventoriesMember_94DF3841A6145CB8BBE6DE40CAAE40D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Inventories [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoriesMember" xlink:label="loc_us-gaap_InventoriesMember_94DF3841A6145CB8BBE6DE40CAAE40D8" xlink:type="locator" />
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    <link:label id="lab_njr_StorageDemandFeesMember_77446C9246DB3E19087076646E923402_terseLabel_en-US" xlink:label="lab_njr_StorageDemandFeesMember_A49562EF4C775942A0ECA89664B2D232" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Storage demand fees</link:label>
    <link:label id="lab_njr_StorageDemandFeesMember_77446C9246DB3E19087076646E923402_label_en-US" xlink:label="lab_njr_StorageDemandFeesMember_A49562EF4C775942A0ECA89664B2D232" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Storage Demand Fees [Member]</link:label>
    <link:label id="lab_njr_StorageDemandFeesMember_77446C9246DB3E19087076646E923402_documentation_en-US" xlink:label="lab_njr_StorageDemandFeesMember_A49562EF4C775942A0ECA89664B2D232" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Storage fees paid to pipelines in the normal course of business.</link:label>
    <link:loc xlink:href="njr-20180331.xsd#njr_StorageDemandFeesMember" xlink:label="loc_njr_StorageDemandFeesMember_A49562EF4C775942A0ECA89664B2D232" xlink:type="locator" />
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    <link:label id="lab_njr_PipelineDemandFeesMember_3CAB7B6BA965874D74B776646E93B518_terseLabel_en-US" xlink:label="lab_njr_PipelineDemandFeesMember_1938AB1A4BFF533A94C84D7BBF4133AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pipeline demand fees</link:label>
    <link:label id="lab_njr_PipelineDemandFeesMember_3CAB7B6BA965874D74B776646E93B518_label_en-US" xlink:label="lab_njr_PipelineDemandFeesMember_1938AB1A4BFF533A94C84D7BBF4133AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pipeline Demand Fees [Member]</link:label>
    <link:label id="lab_njr_PipelineDemandFeesMember_3CAB7B6BA965874D74B776646E93B518_documentation_en-US" xlink:label="lab_njr_PipelineDemandFeesMember_1938AB1A4BFF533A94C84D7BBF4133AC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Demand fees paid to affiliates in the normal course of business.</link:label>
    <link:loc xlink:href="njr-20180331.xsd#njr_PipelineDemandFeesMember" xlink:label="loc_njr_PipelineDemandFeesMember_1938AB1A4BFF533A94C84D7BBF4133AC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentLineItems_D3AD95CF9C71C103AED876646E93A683_label_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentLineItems_05107775D2D45632AA8FC61069A71EC5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentLineItems" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentLineItems_05107775D2D45632AA8FC61069A71EC5" xlink:type="locator" />
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    <link:label id="lab_njr_CurrentChargesRecoverableThroughBgss_1547663F7D5B46CB454676646E94E73E_terseLabel_en-US" xlink:label="lab_njr_CurrentChargesRecoverableThroughBgss_FD96D31F9C5C51329D0DA35F985391BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current charges recoverable through BGSS</link:label>
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    <link:label id="lab_us-gaap_LongtermDebtTypeAxis_58B3613DEBCA5D63235027D308E2CEB1_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis_58B3613DEBCA5D63235027D308E2CEB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_58B3613DEBCA5D63235027D308E2CEB1" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_4F8777A085B5595486C227D308E2A37A_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain_4F8777A085B5595486C227D308E2A37A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_4F8777A085B5595486C227D308E2A37A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DividendsCommonStockCash_5CAD83C9AE6E73B012642687A0E20599_label_en-US" xlink:label="lab_us-gaap_DividendsCommonStockCash_5CAD83C9AE6E73B012642687A0E20599" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends, Common Stock, Cash</link:label>
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    <link:label id="lab_us-gaap_TreasuryStockSharesAcquired_ED494511C373BFA82C552687A0E2F39D_label_en-US" xlink:label="lab_us-gaap_TreasuryStockSharesAcquired_ED494511C373BFA82C552687A0E2F39D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Shares, Acquired</link:label>
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    <link:label id="lab_njr_NjngToNjresAffilateMember_71AE0809DF432CE3355126879F4C84CD_label_en-US" xlink:label="lab_njr_NjngToNjresAffilateMember_71AE0809DF432CE3355126879F4C84CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NJNG to NJRES Affilate [Member]</link:label>
    <link:label id="lab_njr_NjngToNjresAffilateMember_71AE0809DF432CE3355126879F4C84CD_documentation_en-US" xlink:label="lab_njr_NjngToNjresAffilateMember_71AE0809DF432CE3355126879F4C84CD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Affiliate transactions between NJNG and NJR subsidiary NJRES</link:label>
    <link:loc xlink:href="njr-20180331.xsd#njr_NjngToNjresAffilateMember" xlink:label="loc_njr_NjngToNjresAffilateMember_71AE0809DF432CE3355126879F4C84CD" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ExternalCreditRatingInvestmentGradeMember" xlink:label="loc_us-gaap_ExternalCreditRatingInvestmentGradeMember_3D2B5EDA77EA51FAA73ACC401F2D7F87" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ExternalCreditRatingInvestmentGradeMember_3D2B5EDA77EA51FAA73ACC401F2D7F87" xlink:to="lab_us-gaap_ExternalCreditRatingInvestmentGradeMember_3D2B5EDA77EA51FAA73ACC401F2D7F87" xlink:type="arc" />
    <link:label id="lab_us-gaap_ExternalCreditRatingNonInvestmentGradeMember_8610AEFE1C65949739F95721883274B6_terseLabel_en-US" xlink:label="lab_us-gaap_ExternalCreditRatingNonInvestmentGradeMember_2D171056C93151D5A983AB4BD27FBFFE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noninvestment grade</link:label>
    <link:label id="lab_us-gaap_ExternalCreditRatingNonInvestmentGradeMember_8610AEFE1C65949739F95721883274B6_label_en-US" xlink:label="lab_us-gaap_ExternalCreditRatingNonInvestmentGradeMember_2D171056C93151D5A983AB4BD27FBFFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">External Credit Rating, Non Investment Grade [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ExternalCreditRatingNonInvestmentGradeMember" xlink:label="loc_us-gaap_ExternalCreditRatingNonInvestmentGradeMember_2D171056C93151D5A983AB4BD27FBFFE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ExternalCreditRatingNonInvestmentGradeMember_2D171056C93151D5A983AB4BD27FBFFE" xlink:to="lab_us-gaap_ExternalCreditRatingNonInvestmentGradeMember_2D171056C93151D5A983AB4BD27FBFFE" xlink:type="arc" />
    <link:label id="lab_njr_InternallyRatedInvestmentGradeMember_F306D4C57C3F6849E92957218832A944_terseLabel_en-US" xlink:label="lab_njr_InternallyRatedInvestmentGradeMember_177D64DC8C3F566B9724B5150575E867" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Internally rated investment grade</link:label>
    <link:label id="lab_njr_InternallyRatedInvestmentGradeMember_F306D4C57C3F6849E92957218832A944_label_en-US" xlink:label="lab_njr_InternallyRatedInvestmentGradeMember_177D64DC8C3F566B9724B5150575E867" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Internally Rated Investment Grade [Member]</link:label>
    <link:label id="lab_njr_InternallyRatedInvestmentGradeMember_F306D4C57C3F6849E92957218832A944_documentation_en-US" xlink:label="lab_njr_InternallyRatedInvestmentGradeMember_177D64DC8C3F566B9724B5150575E867" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Internally-rated exposure applies to counterparties that are not rated by outside firms. In which case the company's or guarantor's financial statements are reviewed, and  financial ratios are applied to arrive at a substitute rating</link:label>
    <link:loc xlink:href="njr-20180331.xsd#njr_InternallyRatedInvestmentGradeMember" xlink:label="loc_njr_InternallyRatedInvestmentGradeMember_177D64DC8C3F566B9724B5150575E867" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_njr_InternallyRatedInvestmentGradeMember_177D64DC8C3F566B9724B5150575E867" xlink:to="lab_njr_InternallyRatedInvestmentGradeMember_177D64DC8C3F566B9724B5150575E867" xlink:type="arc" />
    <link:label id="lab_njr_InternallyRatedNoninvestmentGradeMember_4A3BCAF16A936337BFA7572188327C28_terseLabel_en-US" xlink:label="lab_njr_InternallyRatedNoninvestmentGradeMember_4510100125235C7289DBD076A073EEA9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Internally rated noninvestment grade</link:label>
    <link:label id="lab_njr_InternallyRatedNoninvestmentGradeMember_4A3BCAF16A936337BFA7572188327C28_label_en-US" xlink:label="lab_njr_InternallyRatedNoninvestmentGradeMember_4510100125235C7289DBD076A073EEA9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Internally Rated Noninvestment Grade [Member]</link:label>
    <link:label id="lab_njr_InternallyRatedNoninvestmentGradeMember_4A3BCAF16A936337BFA7572188327C28_documentation_en-US" xlink:label="lab_njr_InternallyRatedNoninvestmentGradeMember_4510100125235C7289DBD076A073EEA9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Internally-rated exposure applies to counterparties that are not rated by outside firms. In which case the company or guarantor's financial statements are reviewed, and financial ratios are applied tp arrive at a substitute rating.</link:label>
    <link:loc xlink:href="njr-20180331.xsd#njr_InternallyRatedNoninvestmentGradeMember" xlink:label="loc_njr_InternallyRatedNoninvestmentGradeMember_4510100125235C7289DBD076A073EEA9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_njr_InternallyRatedNoninvestmentGradeMember_4510100125235C7289DBD076A073EEA9" xlink:to="lab_njr_InternallyRatedNoninvestmentGradeMember_4510100125235C7289DBD076A073EEA9" xlink:type="arc" />
    <link:label id="lab_us-gaap_CreditDerivativesLineItems_9A0E8B8A41DE2435CC2F57218832D858_terseLabel_en-US" xlink:label="lab_us-gaap_CreditDerivativesLineItems_BD9477EA99725E30B0DE429410749607" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Risk Exposure [Line Items]</link:label>
    <link:label id="lab_us-gaap_CreditDerivativesLineItems_9A0E8B8A41DE2435CC2F57218832D858_label_en-US" xlink:label="lab_us-gaap_CreditDerivativesLineItems_BD9477EA99725E30B0DE429410749607" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Derivatives [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditDerivativesLineItems" xlink:label="loc_us-gaap_CreditDerivativesLineItems_BD9477EA99725E30B0DE429410749607" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditDerivativesLineItems_BD9477EA99725E30B0DE429410749607" xlink:to="lab_us-gaap_CreditDerivativesLineItems_BD9477EA99725E30B0DE429410749607" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_FBD9279DE46E74692ED157218832FA4B_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_4A750D78E1FE5E0E934E78C91AF44258" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross Credit Exposure</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_FBD9279DE46E74692ED157218832FA4B_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_4A750D78E1FE5E0E934E78C91AF44258" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure" xlink:label="loc_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_4A750D78E1FE5E0E934E78C91AF44258" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_5A1FC8B4AD3B9A347D1A57218833BF82_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_C690C56F5ECA51238A136976E23E7D03" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, net liability position, aggregate fair value</link:label>
    <link:label id="lab_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_5A1FC8B4AD3B9A347D1A57218833BF82_label_en-US" xlink:label="lab_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_C690C56F5ECA51238A136976E23E7D03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Net Liability Position, Aggregate Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeNetLiabilityPositionAggregateFairValue" xlink:label="loc_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_C690C56F5ECA51238A136976E23E7D03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_C690C56F5ECA51238A136976E23E7D03" xlink:to="lab_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_C690C56F5ECA51238A136976E23E7D03" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdditionalCollateralAggregateFairValue_1C9B93B62F1F5622A90A572188338874_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalCollateralAggregateFairValue_BCA833CE33B85EDF9F6FF6F212C1E8D7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional collateral, aggregate fair value</link:label>
    <link:label id="lab_us-gaap_AdditionalCollateralAggregateFairValue_1C9B93B62F1F5622A90A572188338874_label_en-US" xlink:label="lab_us-gaap_AdditionalCollateralAggregateFairValue_BCA833CE33B85EDF9F6FF6F212C1E8D7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Collateral, Aggregate Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalCollateralAggregateFairValue" xlink:label="loc_us-gaap_AdditionalCollateralAggregateFairValue_BCA833CE33B85EDF9F6FF6F212C1E8D7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalCollateralAggregateFairValue_BCA833CE33B85EDF9F6FF6F212C1E8D7" xlink:to="lab_us-gaap_AdditionalCollateralAggregateFairValue_BCA833CE33B85EDF9F6FF6F212C1E8D7" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_44F42473F035230BA850707986FD6A57_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_518D446B450D5BF58B32A7CD5CF35AB1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">REPORTING SEGMENT AND OTHER OPERATIONS DATA</link:label>
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_44F42473F035230BA850707986FD6A57_label_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_518D446B450D5BF58B32A7CD5CF35AB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_518D446B450D5BF58B32A7CD5CF35AB1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingDisclosureTextBlock_518D446B450D5BF58B32A7CD5CF35AB1" xlink:to="lab_us-gaap_SegmentReportingDisclosureTextBlock_518D446B450D5BF58B32A7CD5CF35AB1" xlink:type="arc" />
    <link:label id="lab_njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_CF79D4796FC7E7D2A0272687A18B39B4_terseLabel_en-US" xlink:label="lab_njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_CF79D4796FC7E7D2A0272687A18B39B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Regulatory Assets And Liabilities [Table]</link:label>
    <link:label id="lab_njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_CF79D4796FC7E7D2A0272687A18B39B4_label_en-US" xlink:label="lab_njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_CF79D4796FC7E7D2A0272687A18B39B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Regulatory Assets And Liabilities [Table]</link:label>
    <link:label id="lab_njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_CF79D4796FC7E7D2A0272687A18B39B4_documentation_en-US" xlink:label="lab_njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_CF79D4796FC7E7D2A0272687A18B39B4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Regulatory Assets And Liabilities [Table]</link:label>
    <link:loc xlink:href="njr-20180331.xsd#njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable" xlink:label="loc_njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_CF79D4796FC7E7D2A0272687A18B39B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_CF79D4796FC7E7D2A0272687A18B39B4" xlink:to="lab_njr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_CF79D4796FC7E7D2A0272687A18B39B4" xlink:type="arc" />
    <link:label id="lab_njr_NewJerseyCleanEnergyProgramMember_5AA4882CC93BD637D2712687A18BEAD1_terseLabel_en-US" xlink:label="lab_njr_NewJerseyCleanEnergyProgramMember_5AA4882CC93BD637D2712687A18BEAD1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">New Jersey Clean Energy Program</link:label>
    <link:label id="lab_njr_NewJerseyCleanEnergyProgramMember_5AA4882CC93BD637D2712687A18BEAD1_label_en-US" xlink:label="lab_njr_NewJerseyCleanEnergyProgramMember_5AA4882CC93BD637D2712687A18BEAD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Jersey Clean Energy Program [Member]</link:label>
    <link:label id="lab_njr_NewJerseyCleanEnergyProgramMember_5AA4882CC93BD637D2712687A18BEAD1_documentation_en-US" xlink:label="lab_njr_NewJerseyCleanEnergyProgramMember_5AA4882CC93BD637D2712687A18BEAD1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents a funding obligation associated with a statewide program designed to promote energy efficiency through financial incentives, programs and services. NJNG's share of the funding obligation is recoverable from customers.</link:label>
    <link:loc xlink:href="njr-20180331.xsd#njr_NewJerseyCleanEnergyProgramMember" xlink:label="loc_njr_NewJerseyCleanEnergyProgramMember_5AA4882CC93BD637D2712687A18BEAD1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_njr_NewJerseyCleanEnergyProgramMember_5AA4882CC93BD637D2712687A18BEAD1" xlink:to="lab_njr_NewJerseyCleanEnergyProgramMember_5AA4882CC93BD637D2712687A18BEAD1" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetRecoverableGasCostsMember_719DED20C302BFDC35412687A18B34FC_terseLabel_en-US" xlink:label="lab_us-gaap_AssetRecoverableGasCostsMember_719DED20C302BFDC35412687A18B34FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underrecovered gas costs</link:label>
    <link:label id="lab_us-gaap_AssetRecoverableGasCostsMember_719DED20C302BFDC35412687A18B34FC_label_en-US" xlink:label="lab_us-gaap_AssetRecoverableGasCostsMember_719DED20C302BFDC35412687A18B34FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset Recoverable Gas Costs [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRecoverableGasCostsMember" xlink:label="loc_us-gaap_AssetRecoverableGasCostsMember_719DED20C302BFDC35412687A18B34FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetRecoverableGasCostsMember_719DED20C302BFDC35412687A18B34FC" xlink:to="lab_us-gaap_AssetRecoverableGasCostsMember_719DED20C302BFDC35412687A18B34FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredDerivativeGainLossMember_B324B3C5A33F06C28F1D2687A18B383F_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredDerivativeGainLossMember_B324B3C5A33F06C28F1D2687A18B383F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Derivatives at fair value, net</link:label>
    <link:label id="lab_us-gaap_DeferredDerivativeGainLossMember_B324B3C5A33F06C28F1D2687A18B383F_label_en-US" xlink:label="lab_us-gaap_DeferredDerivativeGainLossMember_B324B3C5A33F06C28F1D2687A18B383F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Derivative Gain (Loss) [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredDerivativeGainLossMember" xlink:label="loc_us-gaap_DeferredDerivativeGainLossMember_B324B3C5A33F06C28F1D2687A18B383F" xlink:type="locator" />
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    <link:label id="lab_njr_EnviromentalRemediationCostsExpendedNetOfRecoveriesMember_D7C34229CB294F1379B52687A18B2A91_terseLabel_en-US" xlink:label="lab_njr_EnviromentalRemediationCostsExpendedNetOfRecoveriesMember_D7C34229CB294F1379B52687A18B2A91" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expended, net of recoveries</link:label>
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    <link:label id="lab_njr_EnviromentalRemediationCostsExpendedNetOfRecoveriesMember_D7C34229CB294F1379B52687A18B2A91_documentation_en-US" xlink:label="lab_njr_EnviromentalRemediationCostsExpendedNetOfRecoveriesMember_D7C34229CB294F1379B52687A18B2A91" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying amount as of the balance sheet date of environmental remediation costs expended, net of recoveries recognized in noncurrent regulatory assets</link:label>
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    <link:label id="lab_us-gaap_StormCostsMember_9E810E152BEC2097F9BA2687A18CA012_terseLabel_en-US" xlink:label="lab_us-gaap_StormCostsMember_9E810E152BEC2097F9BA2687A18CA012" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred storm damage costs</link:label>
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    <link:label id="lab_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_39C0B3BB89525C9F54012687A18C192C_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_39C0B3BB89525C9F54012687A18C192C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other noncurrent regulatory assets</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherRegulatoryAssetsLiabilitiesMember" xlink:label="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_39C0B3BB89525C9F54012687A18C192C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RegulatoryLiabilityAxis_AE0E9D9A5C2C2C63B6D92687A18CBA8C_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityAxis_AE0E9D9A5C2C2C63B6D92687A18CBA8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Regulatory Liability [Axis]</link:label>
    <link:label id="lab_us-gaap_RegulatoryLiabilityAxis_AE0E9D9A5C2C2C63B6D92687A18CBA8C_label_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityAxis_AE0E9D9A5C2C2C63B6D92687A18CBA8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Regulatory Liability [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:label="loc_us-gaap_RegulatoryLiabilityAxis_AE0E9D9A5C2C2C63B6D92687A18CBA8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_AE0E9D9A5C2C2C63B6D92687A18CBA8C" xlink:to="lab_us-gaap_RegulatoryLiabilityAxis_AE0E9D9A5C2C2C63B6D92687A18CBA8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_RegulatoryLiabilityDomain_1947E2BF2A560C17B5EA2687A18C67A4_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityDomain_1947E2BF2A560C17B5EA2687A18C67A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Regulatory Liability [Domain]</link:label>
    <link:label id="lab_us-gaap_RegulatoryLiabilityDomain_1947E2BF2A560C17B5EA2687A18C67A4_label_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityDomain_1947E2BF2A560C17B5EA2687A18C67A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Regulatory Liability [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_1947E2BF2A560C17B5EA2687A18C67A4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DeferredDerivativeGainLossMember_BE824D40E44CA9A761752687A18C50C7_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredDerivativeGainLossMember_BE824D40E44CA9A761752687A18C50C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivatives at fair value, net</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RemovalCostsMember" xlink:label="loc_us-gaap_RemovalCostsMember_D1B23CC313DC6A8E90002687A18DEDE7" xlink:type="locator" />
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    <link:label id="lab_njr_OtherRegulatoryNoncurrentLiabilityMember_89E85895FEEEA8AC34E12687A18D133E_terseLabel_en-US" xlink:label="lab_njr_OtherRegulatoryNoncurrentLiabilityMember_89E85895FEEEA8AC34E12687A18D133E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other noncurrent regulatory liabilities</link:label>
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    <link:label id="lab_njr_OtherRegulatoryNoncurrentLiabilityMember_89E85895FEEEA8AC34E12687A18D133E_documentation_en-US" xlink:label="lab_njr_OtherRegulatoryNoncurrentLiabilityMember_89E85895FEEEA8AC34E12687A18D133E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying amount as of the balance sheet date of other noncurrent regulatory liabilities.</link:label>
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    <link:loc xlink:href="njr-20180331.xsd#njr_RegulatoryAssetsAndLiabilitiesLineItems" xlink:label="loc_njr_RegulatoryAssetsAndLiabilitiesLineItems_875B334745EA86A660102687A18D9285" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_7B85004EE6A9441A88552687A1EAB4E1_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_7B85004EE6A9441A88552687A1EAB4E1" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Utility plant</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquireOtherProductiveAssets_F2E2CC9FD0B37BB526BC2687A1EAC422_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireOtherProductiveAssets_F2E2CC9FD0B37BB526BC2687A1EAC422" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Solar and wind equipment</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment_53C9C1A042BA546FF2962687A1EB0C10_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment_53C9C1A042BA546FF2962687A1EB0C10" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Real estate properties and other</link:label>
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    <link:label id="lab_us-gaap_PaymentsForRemovalCosts_9E33D8FA1EC2E96D50502687A1EBD53A_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRemovalCosts_9E33D8FA1EC2E96D50502687A1EBD53A" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Cost of removal</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquireOtherInvestments_1A253CE68917872A8C6C2687A1EB3B5C_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireOtherInvestments_1A253CE68917872A8C6C2687A1EB3B5C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Other Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireOtherInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireOtherInvestments_1A253CE68917872A8C6C2687A1EB3B5C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_4CA027B04A79B295F44B2687A1EB1CE0_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_4CA027B04A79B295F44B2687A1EB1CE0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Distribution from equity investees in excess of equity in earnings</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesGross_5F267BD559BAEA926C072687A1EB08CE_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesGross_5F267BD559BAEA926C072687A1EB08CE" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Cash paid related to acquisition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_5F267BD559BAEA926C072687A1EB08CE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInRestrictedCash_711288DB3C201287A2BA2687A1EB7001_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInRestrictedCash_711288DB3C201287A2BA2687A1EB7001" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">(Deposits to) withdrawal from restricted cash construction fund</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInRestrictedCash_711288DB3C201287A2BA2687A1EB7001_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInRestrictedCash_711288DB3C201287A2BA2687A1EB7001" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Restricted Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInRestrictedCash" xlink:label="loc_us-gaap_IncreaseDecreaseInRestrictedCash_711288DB3C201287A2BA2687A1EB7001" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_967FDFF841627E68B8FC2687A1EBFAD3_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_967FDFF841627E68B8FC2687A1EBFAD3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of property, net of closing costs</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromDivestitureOfBusinesses_CB3E6AD8798E310CE7D42687A1EB93D2_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromDivestitureOfBusinesses_CB3E6AD8798E310CE7D42687A1EB93D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of business, net of closing costs</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_80E9DB22360781E1CE602687A1EBF1B5_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_80E9DB22360781E1CE602687A1EBF1B5" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Cash flows used in investing activities</link:label>
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    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_4B748D0463D9E9DF64C92687A1EC8C4B_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_4B748D0463D9E9DF64C92687A1EC8C4B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Payments of long-term debt</link:label>
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