-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 lKMlYEONpBF3YkCxmcujjQ==

<SEC-DOCUMENT>0001013237-06-000012.txt : 20060106
<SEC-HEADER>0001013237-06-000012.hdr.sgml : 20060106
<ACCEPTANCE-DATETIME>20060106131203
ACCESSION NUMBER:		0001013237-06-000012
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060105
FILED AS OF DATE:		20060106
DATE AS OF CHANGE:		20060106

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FACTSET RESEARCH SYSTEMS INC
		CENTRAL INDEX KEY:			0001013237
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC. [7370]
		IRS NUMBER:				133362547
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0831

	BUSINESS ADDRESS:	
		STREET 1:		601 MERRITT 7
		CITY:			NORWALK
		STATE:			CT
		ZIP:			06851
		BUSINESS PHONE:		2038101000

	MAIL ADDRESS:	
		STREET 1:		601 MERRITT 7
		CITY:			NORWALK
		STATE:			CT
		ZIP:			06851

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			THOMAS TOWNSEND
		CENTRAL INDEX KEY:			0001164874

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11869
		FILM NUMBER:		06515751

	BUSINESS ADDRESS:	
		STREET 1:		FACTSET RESEARCH SYSTEMS INC
		STREET 2:		ONE GREENWICH PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		2038631500

	MAIL ADDRESS:	
		STREET 1:		FACTSET RESEARCH SYHSTEMS INC
		STREET 2:		ONE GREENWICH PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4-tt12_ex.xml
<TEXT>
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    <issuer>
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        <issuerName>FACTSET RESEARCH SYSTEMS INC</issuerName>
        <issuerTradingSymbol>FDS</issuerTradingSymbol>
    </issuer>

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            <rptOwnerName>THOMAS TOWNSEND</rptOwnerName>
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            <rptOwnerStreet1>FACTSET RESEARCH SYSTEMS INC</rptOwnerStreet1>
            <rptOwnerStreet2>601 MERRITT 7</rptOwnerStreet2>
            <rptOwnerCity>NORWALK</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06851</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Content Officer</officerTitle>
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    </reportingOwner>

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            <transactionAmounts>
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                <transactionPricePerShare>
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    <ownerSignature>
        <signatureName>Townsend Thomas</signatureName>
        <signatureDate>2006-01-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----