27th Regiment

27th Regiment may refer to:


 * 27th (Inniskilling) Regiment of Foot, infantry regiment of the British Army
 * 27th Marine Regiment (United States), deactivated infantry regiment of the United States Marine Corps
 * 27th Infantry Regiment, unit of the United States Army established in 1901
 * 27th Connecticut Infantry
 * 27th Maine Volunteer Infantry Regiment
 * 27th Illinois Volunteer Infantry Regiment
 * 27th Regiment Indiana Infantry
 * 27th Iowa Volunteer Infantry Regiment
 * 27th Regiment Kentucky Volunteer Infantry
 * 27th Michigan Volunteer Infantry Regiment
 * 27th New Jersey Volunteer Infantry Regiment
 * 27th New York Volunteer Infantry Regiment
 * 27th Wisconsin Volunteer Infantry Regiment
 * 27th Punjabis, infantry regiment of the British Indian Army
 * 27th Lancers, temporary cavalry regiment of the British Army from 1941 to 1945