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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 iqrkGHr9VY4jNtqIZcHlAg==

<SEC-DOCUMENT>0001104659-05-003961.txt : 20050203
<SEC-HEADER>0001104659-05-003961.hdr.sgml : 20050203
<ACCEPTANCE-DATETIME>20050203173719
ACCESSION NUMBER:		0001104659-05-003961
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050201
FILED AS OF DATE:		20050203
DATE AS OF CHANGE:		20050203

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TCW GROUP INC
		CENTRAL INDEX KEY:			0000850401
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16317
		FILM NUMBER:		05574435

	BUSINESS ADDRESS:	
		STREET 1:		865 SOUTH FIGUEROA ST
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90017

	MAIL ADDRESS:	
		STREET 1:		865 SOUTH FIGUEROA STREET
		STREET 2:		865 SOUTH FIGUEROA STREET
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90017

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CONTANGO OIL & GAS CO
		CENTRAL INDEX KEY:			0001071993
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				954079863
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		3700 BUFFALO SPEEDWAY SUITE 960
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77098
		BUSINESS PHONE:		7139601901

	MAIL ADDRESS:	
		STREET 1:		3700 BUFFALO SPEEDWAY SUITE 960
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77098

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MGPX VENTURES INC
		DATE OF NAME CHANGE:	19981013

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TRUST CO OF THE WEST
		CENTRAL INDEX KEY:			0001145262
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16317
		FILM NUMBER:		05574436

	BUSINESS ADDRESS:	
		STREET 1:		865 SOUTH FIGUEROA STREET, 18TH FLOOR
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90017
		BUSINESS PHONE:		2132440000

	MAIL ADDRESS:	
		STREET 1:		865 SOUTH FIGUEROA STREET 18TH FLOOR
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90017
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-02-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001071993</issuerCik>
        <issuerName>CONTANGO OIL &amp; GAS CO</issuerName>
        <issuerTradingSymbol>MCF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001145262</rptOwnerCik>
            <rptOwnerName>TRUST CO OF THE WEST</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>865 SOUTH FIGUEROA STREET, STE. 1800</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000850401</rptOwnerCik>
            <rptOwnerName>TCW GROUP INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>865 SOUTH FIGUEROA STREET, STE. 1800</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-02-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>100000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>8.20</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2751852</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Trust Company of the West, a California trust company (&quot;TCW&quot;) holds its securities in Contango Oil &amp; Gas Co. (&quot;Contango&quot;) as Investment Manager pursuant to the Investment Management Agreement, dated as of June 6, 1988, between General Mills, Inc. and TCW and as Custodian pursuant to the Custody Agreement, dated as of February 6, 1989, among General Mills, Inc., TCW and State Street Bank and Trust Company, as Trustee.  Trust Company of the West disclaims beneficial ownership of the shares of Contango Common Stock reported herein.  The TCW Group, Inc., a Nevada corporation (&quot;TCWG&quot;), as the parent of TCW may be deemed to beneficially own shares of Contango Common Stock deemed to be owned by TCW; TCWG disclaims beneficial ownership of the shares of Contango Common Stock reported herein and the filing of this Form 4 shall not be construed as an admission that any such entity is the beneficial owner of any securities covered by such filing.</footnote>
        <footnote id="F2">TCWG is primarily engaged in the provision of investment management services.  The ultimate parent company of TCWG and TCW is Societe Generale, S.A., a company incorporated under the laws of France (&quot;SG&quot;).  The principal business of SG is acting as a holding company for a global financial services group, which includes certain distinct specialized business units that are independently operated, including TCWG.  SG, for purposes of the federal securities laws, may be deemed ultimately to control TCWG and TCW.  SG, its executive officers and directors, and its direct and indirect subsidiaries (including all of its business units except TCWG), may beneficially own securities of the Issuer and such securities are not reported in this statement.</footnote>
    </footnotes>

    <remarks>These shares are owned directly by TCW.  The securities laws deem TCWG to be an indirect beneficial owner of the shares listed on Table I and Table II.  TCW is an investment company which invests in securities and other obligations of entities.</remarks>

    <ownerSignature>
        <signatureName>/s/ Lazarus N. Sun, Authorized Signatory</signatureName>
        <signatureDate>2005-02-03</signatureDate>
    </ownerSignature>
</ownershipDocument>

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</TEXT>
</DOCUMENT>
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