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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 N2uwKhSwGKTTpdlbPROE9kEqyMvH9NV1i5rPiIMtxz79hopAXOYodpROwNDazOw1
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<SEC-DOCUMENT>0001412234-08-000024.txt : 20080630
<SEC-HEADER>0001412234-08-000024.hdr.sgml : 20080630
<ACCEPTANCE-DATETIME>20080630143210
ACCESSION NUMBER:		0001412234-08-000024
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080626
FILED AS OF DATE:		20080630
DATE AS OF CHANGE:		20080630

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:			Sellers Capital LLC
		CENTRAL INDEX KEY:			0001412234
		STATE OF INCORPORATION:			IL
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16317
		FILM NUMBER:		08925275

	BUSINESS ADDRESS:	
		STREET 1:		311 S WACKER DR
		STREET 2:		STE 925
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		312-775-1300

	MAIL ADDRESS:	
		STREET 1:		311 S WACKER DR
		STREET 2:		STE 925
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-06-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001412234</rptOwnerCik>
            <rptOwnerName>Sellers Capital LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>311 S WACKER DR</rptOwnerStreet1>
            <rptOwnerStreet2>STE 925</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60606</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Contango Oil &amp; Gas Co. October 2008 Call</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>100</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2008-06-26</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>35</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.5</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2008-10-18</value>
            </exerciseDate>
            <expirationDate>
                <value>2008-10-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Contango Oil &amp; Gas Co.</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>35</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Sellers Capital, LLC acquired the options on behalf of Praetorian Value Fund, a limited liability company organized under the laws of Delaware.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Mark A Sellers</signatureName>
        <signatureDate>2008-06-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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