-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 RSTHOThXGkqisu2YyQIdNuGkaTSFrYr9wF7A/Ypj+naojF0wmvWe/DhCljnjngMz
 xySunDBT7mH10kuJtEgv4w==

<SEC-DOCUMENT>0001179110-10-013970.txt : 20100917
<SEC-HEADER>0001179110-10-013970.hdr.sgml : 20100917
<ACCEPTANCE-DATETIME>20100917163833
ACCESSION NUMBER:		0001179110-10-013970
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100917
FILED AS OF DATE:		20100917
DATE AS OF CHANGE:		20100917

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			IVEN THOMAS
		CENTRAL INDEX KEY:			0001232033

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13703
		FILM NUMBER:		101078582

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Six Flags Entertainment Corp
		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:		1540 BROADWAY, 15TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036
		BUSINESS PHONE:		212 652-9403

	MAIL ADDRESS:	
		STREET 1:		1540 BROADWAY, 15TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SIX FLAGS, INC.
		DATE OF NAME CHANGE:	20070322

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SIX FLAGS INC
		DATE OF NAME CHANGE:	20000714

	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>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-09-17</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000701374</issuerCik>
        <issuerName>Six Flags Entertainment Corp</issuerName>
        <issuerTradingSymbol>SIX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001232033</rptOwnerCik>
            <rptOwnerName>IVEN THOMAS</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SIX FLAGS ENTERTAINMENT CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>924 AVENUE J EAST</rptOwnerStreet2>
            <rptOwnerCity>GRAND PRAIRIE</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75050</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Senior VP-Operations</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks>Mr. Iven is continuing with the Issuer in his role as Senior Vice President - Operations.  However, in connection with recent management changes, the Issuer has re-evaluated its officers required for Section 16 reporting purposes.</remarks>

    <ownerSignature>
        <signatureName>/s/ Thomas Iven</signatureName>
        <signatureDate>2010-09-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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