<SEC-DOCUMENT>0001562180-24-003222.txt : 20240403
<SEC-HEADER>0001562180-24-003222.hdr.sgml : 20240403
<ACCEPTANCE-DATETIME>20240403132934
ACCESSION NUMBER:		0001562180-24-003222
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20240401
FILED AS OF DATE:		20240403
DATE AS OF CHANGE:		20240403

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Carroll David C.
		CENTRAL INDEX KEY:			0001455987
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03880
		FILM NUMBER:		24817860

	MAIL ADDRESS:	
		STREET 1:		C/O CHANGING WORLD TECHNOLOGIES
		STREET 2:		460 HEMPSTEAD AVENUE
		CITY:			WEST HEMPSTEAD
		STATE:			NY
		ZIP:			11552

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NATIONAL FUEL GAS CO
		CENTRAL INDEX KEY:			0000070145
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS DISTRIBUTION [4924]
		ORGANIZATION NAME:           	01 Energy & Transportation
		IRS NUMBER:				131086010
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		6363 MAIN STREET
		CITY:			WILLIAMSVILLE
		STATE:			NY
		ZIP:			14221-5887
		BUSINESS PHONE:		716-857-7000

	MAIL ADDRESS:	
		STREET 1:		6363 MAIN STREET
		STREET 2:		6363 MAIN STREET
		CITY:			WILLIAMSVILLE
		STATE:			NY
		ZIP:			14221-5887
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>PRIMARY DOCUMENT
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    <documentType>4</documentType>

    <periodOfReport>2024-04-01</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

    <issuer>
        <issuerCik>0000070145</issuerCik>
        <issuerName>NATIONAL FUEL GAS CO</issuerName>
        <issuerTradingSymbol>NFG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001455987</rptOwnerCik>
            <rptOwnerName>Carroll David C.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6363 MAIN STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WILLIAMSVILLE</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>14221</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
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                <transactionFormType>5</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
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                <value>E</value>
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            <transactionAmounts>
                <transactionShares>
                    <value>280.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>50.302</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28855.00</value>
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                <value>E</value>
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                <transactionShares>
                    <value>109.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>50.38</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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            </securityTitle>
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            <transactionDate>
                <value>2024-04-01</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>820.00</value>
                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                    <value>Common Stock</value>
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                    <value>820.00</value>
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            </underlyingSecurity>
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                </sharesOwnedFollowingTransaction>
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    <footnotes>
        <footnote id="F1">Acquired through dividend reinvestment plan, exempt under Rule 16a-11.</footnote>
        <footnote id="F2">Acquired through dividend reinvestment feature of the National Fuel Gas Company Deferred Compensation Plan for Directors and Officers, exempt under Rule 16a-11.</footnote>
        <footnote id="F3">Each deferred stock unit is the economic equivalent of one share of common stock.  The deferred stock units become payable, in shares of common stock, after the reporting person's termination of service as a director, pursuant to the reporting person's distribution election under the National Fuel Gas Company Deferred Compensation Plan for Directors and Officers.</footnote>
        <footnote id="F4">Acquired through quarterly grant under the National Fuel Gas Company 2009 Non-Employee Director Equity Compensation Plan, and deferred pursuant to the reporting person's election under the National Fuel Gas Company Deferred Compensation Plan for Directors and Officers.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>J. P. Baetzhold, Attorney in Fact</signatureName>
        <signatureDate>2024-04-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</DOCUMENT>
</SEC-DOCUMENT>
