13th Regiment

13th Regiment or 13th Infantry Regiment may refer to:


 * 13th Parachute Dragoon Regiment, a unit of the French Special Forces
 * Somerset Light Infantry (13th Regiment of Foot), a unit of the British Army
 * 13th Infantry Regiment (Philippine Commonwealth Army), a unit of the Philippine Commonwealth Army
 * 13th Cavalry Regiment (United States), a unit of the United States Army
 * 13th Infantry Regiment (United States), a unit of the United States Army
 * 13th Infantry Regiment (Imperial Japanese Army), a unit of the Imperial Japanese Army


 * American Revolutionary War regiments :
 * 13th Continental Regiment
 * 13th Massachusetts Regiment
 * 13th Pennsylvania Regiment
 * 13th Virginia Regiment


 * American Civil War regiments :


 * Union (Northern) Army


 * 13th Illinois Volunteer Infantry Regiment
 * 13th Iowa Volunteer Infantry Regiment
 * 13th Maine Volunteer Infantry Regiment
 * 13th Regiment Massachusetts Volunteer Infantry
 * 13th Michigan Volunteer Infantry Regiment
 * 13th Regiment Illinois Volunteer Cavalry
 * 13th West Virginia Volunteer Infantry Regiment
 * 13th Wisconsin Volunteer Infantry Regiment