<SEC-DOCUMENT>0001593968-24-001201.txt : 20240913
<SEC-HEADER>0001593968-24-001201.hdr.sgml : 20240913
<ACCEPTANCE-DATETIME>20240913174542
ACCESSION NUMBER:		0001593968-24-001201
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20240913
FILED AS OF DATE:		20240913
DATE AS OF CHANGE:		20240913

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Rainbolt Leslie Jeannine
		CENTRAL INDEX KEY:			0001988872
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-14384
		FILM NUMBER:		241298851

	MAIL ADDRESS:	
		STREET 1:		100 N. BROADWAY
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73102

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BANCFIRST CORP /OK/
		CENTRAL INDEX KEY:			0000760498
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		ORGANIZATION NAME:           	02 Finance
		IRS NUMBER:				731221379
		STATE OF INCORPORATION:			OK
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		100 NORTH BROADWAY AVE
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73102-8401
		BUSINESS PHONE:		4052701000

	MAIL ADDRESS:	
		STREET 1:		100 NORTH BROADWAY AVE
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73102-8401

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UNITED COMMUNITY CORP
		DATE OF NAME CHANGE:	19890401
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_01.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-09-13</periodOfReport>

    <issuer>
        <issuerCik>0000760498</issuerCik>
        <issuerName>BANCFIRST CORP /OK/</issuerName>
        <issuerTradingSymbol>BANF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001988872</rptOwnerCik>
            <rptOwnerName>Rainbolt Leslie Jeannine</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>100 N. BROADWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>OKLAHOMA CITY</rptOwnerCity>
            <rptOwnerState>OK</rptOwnerState>
            <rptOwnerZipCode>73102</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2024-09-13</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10371</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>105.0241</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4944702</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Shares held in Main Street Banking Partners LP</footnote>
        <footnote id="F2">Shares held in Leslie J. Rainbolt Revocable Trust</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ By POA from Leslie Jeannine Rainbolt</signatureName>
        <signatureDate>2024-09-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
