46th Regiment
- 46th (Liverpool Welsh) Royal Tank Regiment
- 46th (South Devonshire) Regiment of Foot
- 46th Arkansas Infantry (Mounted)
- 46th Brigade (disambiguation)
- 46th Division (disambiguation)
- 46th Illinois Volunteer Infantry Regiment
- 46th Indiana Infantry Regiment
- 46th Infantry Brigade (United Kingdom)
- 46th Infantry Regiment (United States)
- 46th Iowa Volunteer Infantry Regiment
- 46th New York Volunteer Infantry
- 46th North Carolina Infantry Regiment
- 46th Ohio Infantry
- 46th Squadron (disambiguation)
- 46th United States Colored Infantry
- 46th Virginia Infantry
- 46th Virginia Infantry Regiment
- 46th Wisconsin Volunteer Infantry Regiment
- List of Virginia Civil War units