-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 E5NfV3ubmKQrJGz43bxDQoewrmDJkflMFowkjOOYRAJNGLm6MoTepN3SXHDlH45h
 1oUUv/9KYpG4rPfviF87aA==

<SEC-DOCUMENT>0001179110-04-012647.txt : 20040610
<SEC-HEADER>0001179110-04-012647.hdr.sgml : 20040610
<ACCEPTANCE-DATETIME>20040610151117
ACCESSION NUMBER:		0001179110-04-012647
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040223
FILED AS OF DATE:		20040610

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SHUMAN STANLEY S
		CENTRAL INDEX KEY:			0001120620

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13703
		FILM NUMBER:		04858185

	BUSINESS ADDRESS:	
		STREET 1:		C/O RIPPLEWOOD HOLDINGS LLC
		STREET 2:		ONE ROCKFELLER PLAZA
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020
		BUSINESS PHONE:		2125826700

	MAIL ADDRESS:	
		STREET 1:		C/O RIPPLEWOOD HOLDINGS LLC
		STREET 2:		ONE ROCKERFELLER PLAZA
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SIX FLAGS INC
		CENTRAL INDEX KEY:			0000701374
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MISCELLANEOUS AMUSEMENT & RECREATION [7990]
		IRS NUMBER:				736137714
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		11501 NE EXPWY
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73131
		BUSINESS PHONE:		4054752500

	MAIL ADDRESS:	
		STREET 1:		122 EAST 42ND STREET 49TH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10168

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TIERCO GROUP INC/DE/
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-02-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000701374</issuerCik>
        <issuerName>SIX FLAGS INC</issuerName>
        <issuerTradingSymbol>PKS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001120620</rptOwnerCik>
            <rptOwnerName>SHUMAN STANLEY S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>711 FIFTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Options (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>7.25</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-02-23</value>
                <footnoteId id="F2"/>
            </transactionDate>
            <deemedExecutionDate>
                <value>2004-06-01</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>20000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.25</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2011-02-23</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>20000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>80000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These options vest in five annual installments commencing on the date of the grant.</footnote>
        <footnote id="F2">Represents shares that were subject to shareholder approval.  Approval granted on June 1, 2004.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Stanley S. Shuman</signatureName>
        <signatureDate>2004-06-10</signatureDate>
    </ownerSignature>
</ownershipDocument>

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