39th Regiment

39th Regiment may refer to:


 * The Central India Horse (21st King George V's Own Horse) (39th Regiment Central India Horse), a unit of the British Indian Army
 * 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 United Kingdom Army
 * 39th Regiment Royal Artillery, a unit of the United Kingdom Army
 * 39th Infantry Regiment (United States), a unit of the United States 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