Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the Registration Statementof FactSet Research Systems Inc. on Form S-8 (Nos. 333-201498, 333-171667, 333-156649, 333-59839, 333-56870, and 333-22319) of our reportdated March 31, 2015, on our audit ofthe consolidated financialstatements of Portware, LLC and Subsidiaries as of December 31, 2014, which report is included in this Form 8-K/A.
/s/ EISNERAMPER LLP
New York, New York
December 30, 2015