9 Squadron or 9th Squadron may refer to:
Aviation units No. 9 Squadron RAAF, Australia 9 Squadron (Belgium) No. 9 Squadron IAF, India 9th Squadron (Iraq) No. 9 Squadron RNZAF, New Zealand No. 9 Squadron PAF, Pakistan No. 9 Squadron SLAF, Sri Lanka No. 9 Squadron RSAF, Saudi Arabia No. 9 Squadron RAF, United Kingdom 9th Aero Squadron, Air Service, United States Army 9th Attack Squadron, United States Air Force 9th Airlift Squadron, United States Air Force 9th Bomb Squadron, United States Air Force 9th Combat Operations Squadron, United States Air Force 9th Fighter Squadron, United States Air Force 9th Operational Weather Squadron, United States Air Force 9th Space Operations Squadron, United States Air Force 9th Special Operations Squadron, United States Air Force Helicopter Anti-Submarine Squadron 9 or HS-9, United States Navy
Other units 9 Parachute Squadron RE, Royal Engineers, British Army