No. 91 (Composite) Wing was a Royal Australian Air Force (RAAF) wing that operated during the Korean War and its immediate aftermath. Formed in October 1950, it administered several RAAF units, including No. 77 (Fighter) Squadron, No. 30 Transport Unit (re-formed in 1953 as No. 36 (Transport) Squadron, which itself spawned RAAF Transport Flight (Japan) in 1955), No. 391 (Base) Squadron, and No. 491 (Maintenance) Squadron. The wing was termed "composite" because it operated a mixed complement of aircraft, rather than only one type. It was disbanded in April 1955.