-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001104659-04-005446.txt : 20040223
<SEC-HEADER>0001104659-04-005446.hdr.sgml : 20040223
<ACCEPTANCE-DATETIME>20040223141341
ACCESSION NUMBER:		0001104659-04-005446
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040202
FILED AS OF DATE:		20040223

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:		04621629

	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>
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<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
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    <schemaVersion>X0201</schemaVersion>

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    <periodOfReport>2004-02-02</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 S. FIGUEROA ST.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES, CA 90017</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>2004-02-03</value>
            </transactionDate>
            <transactionCoding>
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                <transactionCode>M</transactionCode>
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            <transactionTimeliness>
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            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>187028</value>
                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <postTransactionAmounts>
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        </nonDerivativeTransaction>
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    <derivativeTable>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
                <value>2000-08-24</value>
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            <expirationDate>
                <value>2005-08-24</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <underlyingSecurityShares>
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            <transactionDate>
                <value>2004-02-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>185185</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F5"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            </transactionAmounts>
            <exerciseDate>
                <value>1999-12-29</value>
            </exerciseDate>
            <expirationDate>
                <value>2004-12-29</value>
            </expirationDate>
            <underlyingSecurity>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series A Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-02-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <value>2000-08-24</value>
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            <expirationDate>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
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                </underlyingSecurityTitle>
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                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>25000</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Trust Company of the West holds its securities in Contango in its capacities as Investment Manager pursuant to the Investment Management Agreement, dated as of June 6, 1988, between General Mills, Inc. and Trust Company of the West and as Custodian pursuant to the Custody Agreement, dated as of February 6, 1989, among General Mills, Inc., Trust Company of the West and State Street Bank and Trust Company, as Trustee.  Trust Company of the West disclaims beneficial ownership of the shares of the Contango's common stock reported herein.</footnote>
        <footnote id="F2">Trust Company of the West initially purchased the shares of Series A Convertible Preferred Stock (which were converted into these 1,000,000 shares of common stock) pursuant to that certain Securities Purchase Agreement dated as of August 24, 2000 between Trust Company of the West and Contango for an aggregate purchase price of $2,500,000.</footnote>
        <footnote id="F3">Warrants were acquired for no additional consideration pursuant to the Securities Purchase Agreement dated August 24, 2000 in connection with the purchase of certain other securities.</footnote>
        <footnote id="F4">Trust Company of the West beneficially owns certain options to purchase an aggregate of 25,000 shares of Contango's common stock.</footnote>
        <footnote id="F5">Warrants were acquired for no additional consideration pursuant to the Securities Purchase Agreement dated December 29, 1999 in connection with the purchase of certain other securities.</footnote>
        <footnote id="F6">The Series A Convertible Preferred Stock did not have an expiration date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Lazarus N. Sun, Authorized Signatory</signatureName>
        <signatureDate>2004-02-23</signatureDate>
    </ownerSignature>
</ownershipDocument>

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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----