The 78th Fighter Group (78 FG) is an inactive United States Air Force unit. It was last assigned to the 78th Fighter Wing, at Hamilton Air Force Base, California. It was inactivated on 1 February 1961. During World War II the group was an Eighth Air Force fighter unit stationed in England assigned primarily to RAF Duxford. It claimed 338 air to air and 358 air to ground aircraft destroyed. It flew its last mission on 13 April 1945.