9 Squadron was formed on 1 January 1939 at RAAF Base Richmond by renumbering No. 5 Squadron. On formation, the squadron's first commanding officer was a Royal Air Force officer, Squadron Leader J.A.S.
9 Squadron was established on 1 January 1939 at RAAF Base Richmond by renumbering No. 5 Squadron. The first commanding officer of the squadron upon its formation was a Royal Air Force officer, Squadron Leader J.A.S.