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
See also 129th Brigade (disambiguation) 129th Division (disambiguation) 129th (disambiguation)