No. 20 Squadron is a Royal Australian Air Force (RAAF) support squadron. Coming under the control of No. 96 Wing, it is responsible for the management of the airfield at RAAF Base Woomera, South Australia. The squadron originated as a maritime patrol unit during World War II. Raised in August 1941, it operated PBY Catalina and Short Empire flying boats from bases in New Guinea, Queensland and the Northern Territory, conducting search-and-rescue, mine-laying, anti-submarine and bombing missions against Japanese targets in the Pacific theatre. Following the conclusion of hostilities, the squadron was disbanded in March 1946. It was reactivated as an airfield support squadron in April 2015.