59th Regiment
- 59 Medium Regiment (India)
- 59th (Warwickshire) Searchlight Regiment, Royal Artillery
- 59th Air Defense Artillery Regiment
- 59th Illinois Volunteer Infantry Regiment
- 59th Indiana Infantry Regiment
- 59th Infantry Regiment (United States)
- 59th New York Volunteer Infantry Regiment
- 59th Ohio Infantry
- 59th Regiment of Foot (disambiguation)
- 59th Scinde Rifles (Frontier Force)
- 59th Virginia Infantry
- British Army
- British Indian Army
- Indian Army
- United States Army