The 438th Fighter-Interceptor Squadron is an inactive United States Air Force unit. Its last assignment was with the 35th Air Division at Griffiss Air Force Base, New York, where it was inactivated on 30 September 1968. The squadron was first activated as the 438th Fighter Squadron during World War II. It served as an Replacement Training Unit until the spring of 1944, when it was disbanded in a general reorganization of Army Air Forces training units. It was reactivated in 1953 as an air defense unit and served in that role until inactivated.