111th Regiment or 111th Infantry Regiment may refer to:
111th Aviation Regiment (United States) 111th Fighter Aviation Regiment, Yugoslavia 111th Helicopter Regiment, Yugoslavia 111th Regiment of Foot (Loyal Birmingham Volunteers), a unit of the British Army 111th Regiment of Foot (1761), a unit of the British Army 111th Infantry Regiment (United States), a unit of the United States Army 111th Armored Cavalry Regiment, a unit of the United States Army National Guard 111th Cavalry Regiment, a unit of the United States Army National Guard
See also 111th Brigade (disambiguation) 111th Division (disambiguation) 111 Squadron (disambiguation)