The 566th Strategic Missile Squadron is an inactive United States Air Force unit. It was last assigned to the 389th Strategic Missile Wing at Francis E. Warren Air Force Base, Wyoming, where it was inactivated on 25 March 1965. The squadron was equipped with SM-65 Atlases. It was activated as a strategic missile unit at Offutt Air Force Base, Nebraska in 1959, but moved to Warren in 1961 as it was becoming operational.