50th Regiment or 50th Infantry Regiment may refer to:
Infantry regiments 50th (Queen's Own) Regiment of Foot, a unit of the British Army, 1755–1881 Shirley's Regiment (50th Regiment of Foot, American Provincials), a unit of the British Army 50th (Northumbrian) Infantry Division, a unit of the British Army 50th Infantry Regiment (United States), a unit of the United States Army 50th Infantry Regiment (Greece), a unit of the Greek Army 50th Regiment "Highlanders", a unit of the Canadian Army
American Civil War regiments
Union (Northern) regiments 50th Illinois Infantry Regiment 50th Indiana Infantry Regiment 50th Ohio Infantry Regiment 50th Pennsylvania Infantry Regiment 50th Wisconsin Infantry Regiment 50th United States Colored Infantry Regiment
Confederate (Southern) regiments 50th Georgia Infantry Regiment 50th North Carolina Infantry Regiment 50th Virginia Infantry Regiment
Other regiments 50th Anti-Aircraft Missile Regiment (Romania), a unit of the Romanian Army 50th Royal Tank Regiment, a unit of the British Army 50th Armoured Regiment (India), a unit of the Indian Army 50th Field Artillery Regiment (The Prince of Wales Rangers), RCA, a unit of the Canadian Army
See also 50th Division (disambiguation) 50th Brigade (disambiguation) 50th Squadron (disambiguation)