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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 CxiXO7jyorBrHOe51afxIr+d89A20ERD7SD6WbYaDYJMqqE0gxLgDpCZgD4HmHp2
 Ui/IAC/12v/t/QTt5j44Rg==

<SEC-DOCUMENT>0000811532-09-000029.txt : 20090312
<SEC-HEADER>0000811532-09-000029.hdr.sgml : 20090312
<ACCEPTANCE-DATETIME>20090312164540
ACCESSION NUMBER:		0000811532-09-000029
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090310
FILED AS OF DATE:		20090312
DATE AS OF CHANGE:		20090312

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Crage Peter J
		CENTRAL INDEX KEY:			0001301589

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09444
		FILM NUMBER:		09676269

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		(419) 627-2233

	MAIL ADDRESS:	
		STREET 1:		ONE CEDAR POINT DRIVE
		CITY:			SANDUSKY
		STATE:			OH
		ZIP:			44870

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CEDAR FAIR L P
		CENTRAL INDEX KEY:			0000811532
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MISCELLANEOUS AMUSEMENT & RECREATION [7990]
		IRS NUMBER:				341560655
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE CEDAR POINT DRIVE
		CITY:			SANDUSKY
		STATE:			OH
		ZIP:			44870
		BUSINESS PHONE:		4196260830

	MAIL ADDRESS:	
		STREET 1:		ONE CEDAR POINT DRIVE
		CITY:			SANDUSKY
		STATE:			OH
		ZIP:			44870
</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>2009-03-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000811532</issuerCik>
        <issuerName>CEDAR FAIR L P</issuerName>
        <issuerTradingSymbol>FUN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001301589</rptOwnerCik>
            <rptOwnerName>Crage Peter J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE CEDAR POINT DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SANDUSKY</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44870</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Corporate VP Finance &amp; CFO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Units of Limited Partner Interest</value>
            </securityTitle>
            <transactionDate>
                <value>2009-03-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>6796</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12234</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">These units were granted pursuant to the Partnership's 2008 Omnibus Incentive Plan.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Peter J. Crage</signatureName>
        <signatureDate>2009-03-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----