39th Regiment may refer to:
Infantry regiments 2/39 Evzone Regiment, Greece The Garhwal Rifles (39th Garhwal Rifles), a unit of both the British Indian Army, and the present Indian Army 39th (Dorsetshire) Regiment of Foot, a unit of the British Army 39th Infantry Regiment (France), a unit of the French Army 39th Infantry Regiment (United States), a unit of the United States Army 39th Infantry Regiment (War of 1812), a unit of the United States Army
Cavalry regiments Central India Horse (21st King George V's Own Horse) (39th Regiment Central India Horse), a unit of the British Indian Army
Engineering regiments 39 Engineer Regiment (United Kingdom), a unit of the British Army's Royal Engineers
Artillery regiments 39th Regiment Royal Artillery, a unit of the United Kingdom Army
American Civil War units 39th Illinois Volunteer Infantry Regiment, a unit of the Union (Northern) Army 39th Iowa Volunteer Infantry Regiment, a unit of the Union (Northern) Army 39th New Jersey Volunteer Infantry, a unit of the Union (Northern) Army 39th New York Volunteer Infantry Regiment, a unit of the Union (Northern) Army 39th Wisconsin Volunteer Infantry Regiment, a unit of the Union (Northern) Army 39th United States Infantry, a unit of the Union (Northern) Army
See also 39th Division (disambiguation) 39th Brigade (disambiguation) 39th Battalion (disambiguation) 39th Squadron (disambiguation)