129th Regiment
129th Regiment may refer to:
- 129th Duke of Connaught's Own Baluchis, British Indian Army
- 129th Field Artillery Regiment, United States
- 129th Infantry Regiment (United States)
- 129th Regiment of Foot, British Army
American Civil War regiments
- 129th Illinois Infantry Regiment
- 129th Indiana Infantry Regiment
- 129th New York Infantry Regiment, later the 8th New York Heavy Artillery Regiment
- 129th Ohio Infantry Regiment
- 129th Pennsylvania Infantry Regiment