203 Squadron may refer to:
No. 203 Squadron RAF, United Kingdom No. 203 Squadron RSAF, Saudi Arabia 203rd Tactical Fighter Squadron (JASDF), Japan 203 Squadron, Republic of Singapore Air Force; see list of Republic of Singapore Air Force squadrons 203d Aero Squadron, Air Service, United States Army 203rd Air Refueling Squadron, United States Air Force 203d RED HORSE Squadron, United States Air Force VFA-203, United States Navy VMAT-203, United States Marine Corps