No. 25 (City of Perth) Squadron is a general reserve squadron of the Royal Australian Air Force (RAAF). It is based at RAAF Base Pearce in Perth, Western Australia, and forms part of the Combat Reserve Wing. The squadron was formed in early 1937 and until early 1939 was designated as "No. 23 Squadron". During World War II, it provided local air defence for the Perth region, before undertaking Army co-operation duties in 1943–1944 and then converting to the heavy bomber role in 1945. In the heavy bomber role, the squadron took part in operations against Japanese targets in the Netherlands East Indies and supported Allied ground operations during the Borneo Campaign.
Following the end of hostilities, No. 25 Squadron was disbanded in mid-1946 but was re-raised two years later as a Citizen Air Force unit based in Pearce. From 1948 the squadron's reservists flew jet fighters to provide air defence over Western Australia, but the squadron ceased flying duties in 1960 and switched to the ground support role. In 1989, flying operations resumed as No. 25 Squadron assumed responsibility for jet introduction training and fleet support; this role ceased in 1998 and since then the squadron has been tasked with providing a pool of trained personnel to the Air Force.