USS Duncan (FFG-10), fourth ship of the Oliver Hazard Perry-class of guided-missile frigates, was named for Vice Admiral Donald B. Duncan (1896–1975). Ordered from Todd Pacific, Seattle, WA on 27 February 1976 as part of the FY75 program, Duncan was laid down on 29 April 1977, launched on 1 March 1978, and commissioned on 15 May 1980.

USS Duncan (DD-874), named for Captain Silas Duncan USN (1788–1834), was a Gearing-class destroyer laid down by the Consolidated Steel Corporation at Orange, Texas on 22 May 1944, launched on 27 October 1944 by Mrs. D. C. Thayer and commissioned on 25 February 1945, Commander P.

Four ships of the United States Navy have been named USS Duncan after Master Commandant Silas Duncan (1788–1834).