N-CSR Item 12(b) - Exhibits: Certifications

                            SECTION 906 CERTIFICATION

Pursuant to 18  U.S.C.ss.  1350,  the  undersigned  officers of  Federated  U.S.
Government Securities Fund: 2-5 Years(the "Registrant"),  hereby certify, to the
best of our knowledge, that the Registrant's Report on Form N-CSR for the period
ended January 31, 2005 (the "Report")  fully complies with the  requirements  of
Section 13(a) or 15(d),  as  applicable,  of the  Securities and Exchange Act of
1934 and that the information  contained in the Report fairly  presents,  in all
material  respects,  the  financial  condition  and results of operations of the
Registrant.


Dated: August 15, 2005

/s/ J. Christopher Donahue

Title: President, Principal Executive Officer



Dated: August 15, 2005

/s/ Richard J. Thomas

Title: Treasurer, Principal Financial Officer

This  certification is being furnished solely pursuant to 18 U.S.C.ss.  1350 and
is not being filed as part of the Report or as a separate disclosure document.