51st Regiment

51st Regiment or 51st Infantry Regiment may refer to:

51st Regiment of Foot (disambiguation), several units of the British Army 51st Highland Volunteers, a unit of the British Army 51st Infantry Regiment (United States) 51st Armoured Regiment (India) 51st Coast Artillery Regiment, a unit of the United States Army 51st (Leeds Rifles) Royal Tank Regiment 51st (Highland) Searchlight Regiment, Royal Artillery 51st (London) Heavy Anti-Aircraft Regiment, Royal Artillery 51st (Westmoreland and Cumberland Yeomanry) Field Regiment, Royal Artillery 51st Sikhs (Frontier Force), a unit of the British Indian Army

Union Army (American Civil War): 51st Illinois Infantry Regiment 51st Indiana Infantry Regiment 51st Regiment Massachusetts Volunteer Infantry 51st New York Volunteer Infantry 51st Ohio Infantry 51st Pennsylvania Infantry Regiment 51st Wisconsin Volunteer Infantry Regiment 51st United States Colored Infantry Regiment

See also 51st Division (disambiguation)