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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 S4dAJ1HBzwj8jLcg1Hlwos/D4PLE5zykTBWzQueIXbNwMqwn62TUArhA2lnf841t
 cAVWBSk2l39L+cmI5JrYqw==

<SEC-DOCUMENT>0000877890-09-000167.txt : 20091030
<SEC-HEADER>0000877890-09-000167.hdr.sgml : 20091030
<ACCEPTANCE-DATETIME>20091030132122
ACCESSION NUMBER:		0000877890-09-000167
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20091028
FILED AS OF DATE:		20091030
DATE AS OF CHANGE:		20091030

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LEVINE PETER
		CENTRAL INDEX KEY:			0001416237

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27084
		FILM NUMBER:		091147374

	MAIL ADDRESS:	
		STREET 1:		851 WEST CYPRESS CREEK ROAD
		CITY:			FORT LAUDERDALE
		STATE:			FL
		ZIP:			33309

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CITRIX SYSTEMS INC
		CENTRAL INDEX KEY:			0000877890
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				752275152
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		851 WEST CYPRESS CREEK ROAD
		CITY:			FORT LAUDERDALE
		STATE:			FL
		ZIP:			33309
		BUSINESS PHONE:		9542673000

	MAIL ADDRESS:	
		STREET 1:		851 WEST CYPRESS CREEK ROAD
		CITY:			FL LAUDERDALE
		STATE:			FL
		ZIP:			33309
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-10-28</periodOfReport>

    <issuer>
        <issuerCik>0000877890</issuerCik>
        <issuerName>CITRIX SYSTEMS INC</issuerName>
        <issuerTradingSymbol>CTXS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001416237</rptOwnerCik>
            <rptOwnerName>LEVINE PETER</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CITRIX SYSTEMS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>851 WEST CYPRESS CREEK ROAD</rptOwnerStreet2>
            <rptOwnerCity>FORT LAUDERDALE</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33309</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP, Datacenter &amp; Cloud Div</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-10-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>623</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>37.546</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1184</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By The Summit Family Trust</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6703</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2157</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>The Peter Levine Children's Trust FBO Tatym A. Levine UAD 12/30/2008</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2157</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>The Peter Levine Children's Trust FBO Oliver T. Levine UAD 12/30/2008</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share of all shares sold on this date. The actual sale prices per share range from $37.54 to $37.55. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, Citrix Systems, Inc. or any security holders of Citrix Systems, Inc., full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F2">The Summit Family Trust (&quot;Summit&quot;) is an entity of which the reporting person is the trustee and has voting and dispositive power. The reporting person disclaims beneficial ownership with respect to shares held by Summit, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F3">These shares are held in a trust for the benefit of the reporting person's children. The reporting person's spouse is trustee of the trust. The reporting person disclaims beneficial ownership with respect to shares held by The Peter Levine Children's Trust FBO Tatym A. Levine UAD 12/30/2008, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F4">These shares are held in a trust for the benefit of the reporting person's children. The reporting person's spouse is trustee of the trust. The reporting person disclaims beneficial ownership with respect to shares held by The Peter Levine Children's Trust FBO Oliver T. Levine UAD 12/30/2008, except to the extent of his pecuniary interest therein.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Antonio G. Gomes, Attorney-in-Fact for Peter Levine</signatureName>
        <signatureDate>2009-10-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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