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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 SygMK+dzhflu/RBchpvn6LFp/I39VJBJkTwtNWJzdDPIm+wlBOkl+xyHsqRtWMit
 pV+JkpNIQnPPimJdXJjn9A==

<SEC-DOCUMENT>0000927628-05-000001.txt : 20050104
<SEC-HEADER>0000927628-05-000001.hdr.sgml : 20050104
<ACCEPTANCE-DATETIME>20050104191104
ACCESSION NUMBER:		0000927628-05-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20041231
FILED AS OF DATE:		20050104
DATE AS OF CHANGE:		20050104

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BAILAR GREGOR
		CENTRAL INDEX KEY:			0001182910

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13300
		FILM NUMBER:		05509820

	MAIL ADDRESS:	
		STREET 1:		CAPITALONE FINANCIAL CORP
		STREET 2:		2980 FAIRVIEW PARK DR
		CITY:			FALLS CHURCH
		STATE:			VA
		ZIP:			22042

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CAPITAL ONE FINANCIAL CORP
		CENTRAL INDEX KEY:			0000927628
		STANDARD INDUSTRIAL CLASSIFICATION:	PERSONAL CREDIT INSTITUTIONS [6141]
		IRS NUMBER:				541719854
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1680 CAPITAL ONE DRIVE
		STREET 2:		SUITE 1400
		CITY:			MCLEAN
		STATE:			VA
		ZIP:			22102
		BUSINESS PHONE:		7037201000

	MAIL ADDRESS:	
		STREET 1:		1680 CAPITAL ONE DRIVE
		STREET 2:		SUITE 1400
		CITY:			MCLEAN
		STATE:			VA
		ZIP:			22102

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OAKSTONE FINANCIAL CORP
		DATE OF NAME CHANGE:	19940728
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>bai446.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-12-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000927628</issuerCik>
        <issuerName>CAPITAL ONE FINANCIAL CORP</issuerName>
        <issuerTradingSymbol>COF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001182910</rptOwnerCik>
            <rptOwnerName>BAILAR GREGOR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1680 CAPITAL ONE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MCLEAN</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>22102</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-12-31</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1473</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>74.29</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>121250</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents the withholding by the issuer of restricted stock to satisfy the reporting person's tax withholding obligation upon the vesting of restricted stock. This is authorized in the applicable restricted stock award agreement.</footnote>
        <footnote id="F2">Total holdings excludes 5,000 shares that were erroneously included in the previously filed Form 4.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By: Polly A. Nyquist (POA on file)</signatureName>
        <signatureDate>2005-01-04</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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