The 513th Fighter-Interceptor Squadron is an inactive United States Air Force unit. Its last assignment was with the 86th Air Division, based at Phalsbourg-Bourscheid Air Base, France, where it was inactivated on 8 January 1961. The squadron was reactivated in 1952, when it replaced an Air National Guard unit that had been mobilized for the Korean War. The following year it assumed an air defense mission and continued with that mission until inactivated.