USS Monssen (DD-798) was a Fletcher-class destroyer of the United States Navy, the second Navy ship named for Lieutenant Mons Monssen (1867–1930), who was awarded the Medal of Honor for putting out a fire in a magazine on Missouri (BB-11). Monssen was laid down 1 June 1943 by the Bethlehem Steel Co., Shipbuilding Division, Staten Island, New York, N.Y.; launched 30 October 1943; sponsored by Mrs. Mons Monssen; and commissioned 14 February 1944, Commander Bernhart A. Feutsch in command.