80th Regiment
- 80 Squadron (disambiguation)
- 80th Airmobile Regiment (Ukraine)
- 80th Division (disambiguation)
- 80th Illinois Volunteer Infantry Regiment
- 80th Indiana Infantry Regiment
- 80th Infantry Regiment (Imperial Japanese Army)
- 80th New York Volunteer Infantry Regiment
- 80th Ohio Infantry
- 80th Regiment of Foot (Royal Edinburgh Volunteers)
- 80th Regiment of Foot (Staffordshire Volunteers)
- 80th Training Regiment (United States)
- 80th United States Colored Infantry Regiment