104th Regiment or 104th Infantry Regiment may refer to:
104th Infantry Regiment (United States), a unit of the US Army from Springfield, Massachusetts 104th Ohio Infantry, a unit of the US Army during the American Civil War 104th Training Aviation Regiment, a unit of the Yugoslav Air Force 104th Operational Maneuvers Regiment, a unit of the Algerian Army 104th Aviation Regiment (United States), a unit of the United States Army 104th Guards Air Assault Regiment, a unit of the Russian Airborne Forces Several infantry regiments of the British Army listed at 104th Regiment of Foot (disambiguation)
See also 104th Division (disambiguation)