46th Regiment or 46th Infantry Regiment may refer to:
United Kingdom edit
- 46th (South Devonshire) Regiment of Foot, a unit of the British Army
- 46th (Liverpool Welsh) Royal Tank Regiment, a unit of the British Army
- 46th Infantry Brigade (United Kingdom), a unit of the British Army
United States edit
- 46th Infantry Regiment (United States), a unit of the United States Army
American Civil War regiments edit
Union (Northern) Army regiments edit
- 46th Illinois Volunteer Infantry Regiment
- 46th Iowa Volunteer Infantry Regiment
- 46th Wisconsin Volunteer Infantry Regiment
- 46th Indiana Infantry Regiment
- 46th New York Volunteer Infantry
- 46th Ohio Infantry
- 46th United States Colored Infantry
Confederate (Southern) Army regiments edit
- 46th North Carolina Infantry Regiment
- 46th Virginia Infantry Regiment (Pendleton County, West Virginia), a Virginia State Unit
- 46th Arkansas Infantry (Mounted)
- 46th Virginia Infantry