65th Regiment
- 65th (2nd Yorkshire, North Riding) Regiment of Foot
- 65th Air Defense Artillery Regiment
- 65th Armoured Regiment (India)
- 65th Division (disambiguation)
- 65th Illinois Volunteer Infantry Regiment
- 65th Indiana Infantry Regiment
- 65th Infantry Regiment (United States)
- 65th New York Volunteer Infantry
- 65th Ohio Infantry
- 65th Squadron (disambiguation)
- British Army
- Indian Army
- United States Army