56th Regiment may refer to:
- 56th (West Essex) Regiment of Foot, a unit of the British Army
- 56th (King's Own) Anti-Tank Regiment, Royal Artillery, a unit of the British Army
- 56th Punjabi Rifles (Frontier Force), a unit of the British Indian Army
- 56th Infantry Regiment (United States), a unit of United States Army during World War I and World War II
- 56th Air Defense Artillery Regiment, a unit of the United States Army
- 56th Field Artillery Regiment, RCA, a unit of the Canadian Army
- 56th Guards Air Assault Regiment, a unit of the Russian Airborne Troops
- American Civil War
- Union (Northern) Army
- 56th Massachusetts Infantry Regiment
- 56th New York Volunteer Infantry
- 56th Illinois Volunteer Infantry Regiment
- 56th Ohio Infantry
- 56th Regiment Indiana Infantry
- 56th United States Colored Infantry Regiment
- 56th Pennsylvania Infantry
- Confederate (Southern) Army
See also
- 56th Division (disambiguation)
- 56th Group (disambiguation)
- 56th Brigade (disambiguation)
- 56th Squadron (disambiguation)
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