-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CYI+Uhg2Ttp6eszPvvWVTH7vN0//6JYIu+YjHoorDAHlgRkKS3Z+8nSzBtBBgYTN
 oaTPh5VeOQiq1byIEMJMZg==

<SEC-DOCUMENT>0001013237-04-000019.txt : 20040123
<SEC-HEADER>0001013237-04-000019.hdr.sgml : 20040123
<ACCEPTANCE-DATETIME>20040123080345
ACCESSION NUMBER:		0001013237-04-000019
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040122
FILED AS OF DATE:		20040123

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:		ONE GREENWICH PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		2038631500

	MAIL ADDRESS:	
		STREET 1:		ONE GREENWICH PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WILLE HOWARD E
		CENTRAL INDEX KEY:			0001164303

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11869
		FILM NUMBER:		04539098

	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 SYSTEMS INC
		STREET 2:		ONE GREENWICH PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4-hew16_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<!-- - EDGAR Ease Plus 1.0                                   07/25/03  TT    -->
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
   <periodOfReport>2004-01-22</periodOfReport>
   <notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0001013237</issuerCik>
        <issuerName>FACTSET RESEARCH SYSTEMS INC</issuerName>
        <issuerTradingSymbol>FDS</issuerTradingSymbol>
   </issuer>
   <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001164303</rptOwnerCik>
            <rptOwnerName>WILLE HOWARD E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>FACTSET RESEARCH SYSTEMS INC</rptOwnerStreet1>
            <rptOwnerStreet2>ONE GREENWICH PLAZA</rptOwnerStreet2>
            <rptOwnerCity>GREENWICH</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06830</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
         <isDirector>1</isDirector>
         <isOfficer>0</isOfficer>
         <isTenPercentOwner>1</isTenPercentOwner>
         <isOther>0</isOther>
      </reportingOwnerRelationship>
   </reportingOwner>
 <nonDerivativeTable>
   <nonDerivativeTransaction>
      <securityTitle>
         <value>FactSet Research Common Stock</value>
      </securityTitle>
      <transactionDate>
         <value>2004-01-22</value>
      </transactionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>S</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
      </transactionCoding>
      <transactionAmounts>
         <transactionShares>
           <value>2000000</value>
         </transactionShares>
         <transactionPricePerShare>
           <value>34.58</value>
         </transactionPricePerShare>
         <transactionAcquiredDisposedCode>
           <value>D</value>
         </transactionAcquiredDisposedCode>
      </transactionAmounts>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>3600631</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
            <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </nonDerivativeTransaction>
 </nonDerivativeTable>
 <derivativeTable>
   <derivativeHolding>
      <securityTitle>
         <value>FactSet Stock Options</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>34.62</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2002-01-12</value>
      </exerciseDate>
      <expirationDate>
         <value>2011-01-12</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>FactSet Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>3000</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>3000</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>FactSet Stock Options</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>36.70</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-01-11</value>
      </exerciseDate>
      <expirationDate>
         <value>2012-01-11</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>FactSet Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>3000</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>6000</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>FactSet Stock Options</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>29.20</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2004-01-10</value>
      </exerciseDate>
      <expirationDate>
         <value>2013-01-10</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>FactSet Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>3000</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>9000</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>FactSet Stock Options</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>37.45</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2005-01-09</value>
      </exerciseDate>
      <expirationDate>
         <value>2014-01-09</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>FactSet Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>3000</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>12000</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </derivativeHolding>
 </derivativeTable>
   <ownerSignature>
      <signatureName>Howard E. Wille</signatureName>
      <signatureDate>2004-01-22</signatureDate>
   </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----