<SEC-DOCUMENT>0001562180-24-008126.txt : 20241203
<SEC-HEADER>0001562180-24-008126.hdr.sgml : 20241203
<ACCEPTANCE-DATETIME>20241203175214
ACCESSION NUMBER:		0001562180-24-008126
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20241201
FILED AS OF DATE:		20241203
DATE AS OF CHANGE:		20241203

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Mendel Elena G
		CENTRAL INDEX KEY:			0001781310
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03880
		FILM NUMBER:		241523997

	MAIL ADDRESS:	
		STREET 1:		6363 MAIN STREET
		CITY:			WILLIAMSVILLE
		STATE:			NY
		ZIP:			14221

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>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primarydocument.xml
<DESCRIPTION>PRIMARY DOCUMENT
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        <issuerName>NATIONAL FUEL GAS CO</issuerName>
        <issuerTradingSymbol>NFG</issuerTradingSymbol>
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            <rptOwnerName>Mendel Elena G</rptOwnerName>
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            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WILLIAMSVILLE</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>14221</rptOwnerZipCode>
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            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>Controller &amp; Pr. Acct. Officer</officerTitle>
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                    <footnoteId id="F1"/>
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                <transactionPricePerShare>
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            <securityTitle>
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            <transactionDate>
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            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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                <transactionCode>M</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>318.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
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            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10700.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        <nonDerivativeTransaction>
            <securityTitle>
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            <transactionDate>
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            </transactionDate>
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                <transactionCode>F</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>163.00</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>64.168</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
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                <sharesOwnedFollowingTransaction>
                    <value>10537.00</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
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            <transactionDate>
                <value>2024-12-02</value>
            </transactionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>327.00</value>
                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
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                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
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            </transactionDate>
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                <equitySwapInvolved>false</equitySwapInvolved>
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                    <footnoteId id="F4"/>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
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                    <footnoteId id="F5"/>
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                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>401K Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
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        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
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            <transactionDate>
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            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>318.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            </exerciseDate>
            <expirationDate>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
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                    <value>318.00</value>
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            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>319.00</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        <derivativeTransaction>
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                <value>Restricted Stock Units</value>
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            <transactionDate>
                <value>2024-12-02</value>
            </transactionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>327.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F7"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F7"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>327.00</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>0.00</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
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    </derivativeTable>

    <footnotes>
        <footnote id="F1">Acquired through dividend reinvestment plan, exempt under Rule 16a-11.</footnote>
        <footnote id="F2">Restricted stock units convert into common stock on a one-for-one basis.</footnote>
        <footnote id="F3">On December 1, 2024, the reporting person had 163 shares withheld and cancelled in respect of taxes in connection with the vesting of restricted stock units. These share cancellations are shown on Table I as dispositions (Transaction Code &quot;D&quot; in Column 4), although none of these cancelled shares were sold into the market, as indicated by Transaction Code &quot;F&quot; in Column 3.</footnote>
        <footnote id="F4">On December 2, 2024, the reporting person had 167 shares withheld and cancelled in respect of taxes in connection with the vesting of restricted stock units. These share cancellations are shown on Table I as dispositions (Transaction Code &quot;D&quot; in Column 4), although none of these cancelled shares were sold into the market, as indicated by Transaction Code &quot;F&quot; in Column 3.</footnote>
        <footnote id="F5">The NFG stock fund under the NFG 401(k) plan is denominated in units, representing ownership interests in a fund that includes both NFG common stock and a reserve of cash.  The information reported represents the dollar value of the reporting person's balance in the NFG stock fund as of December 2, 2024, as reported by the plan administrator, divided by the closing price of NFG common stock on that date.</footnote>
        <footnote id="F6">On December 1, 2022, the reporting person was granted 955 restricted stock units, vesting as follows: 318 on December 1, 2023, 318 on December 1, 2024, and 319 on December 1, 2025.</footnote>
        <footnote id="F7">On December 2, 2021, the reporting person was granted 981 restricted stock units, vesting as follows: 327 on December 2, 2022, 327 on December 2, 2023, and 327 on December 2, 2024.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>J. P. Baetzhold, Attorney in Fact</signatureName>
        <signatureDate>2024-12-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
