No. 77 Wing was a Royal Australian Air Force (RAAF) wing of World War II. It formed part of No. 10 Operational Group (later the Australian First Tactical Air Force) at its establishment in November 1943, when it comprised three squadrons equipped with Vultee Vengeance dive bombers. No. 77 Wing commenced operations in early 1944, flying out of Nadzab, Papua New Guinea. Soon afterwards, however, the Vengeance units were withdrawn from combat and replaced with squadrons flying Douglas Bostons, Bristol Beaufighters and Bristol Beauforts. The wing saw action in the assaults on Noemfoor, Tarakan, and North Borneo, by which time it was an all-Beaufighter formation made up of Nos. 22, 30 and 31 Squadrons. It was to have taken part in the Battle of Balikpapan in June 1945, but unsuitable landing grounds meant that the Beaufighter units were withdrawn to Morotai, sitting out the remainder of the war before returning to Australia, where they disbanded, along with the wing headquarters, in 1946.