104

104 may refer to:
 * 104 (number), a natural number
 * AD 104, a year in the 2nd century AD
 * 104 BC, a year in the 2nd century BC
 * 104 (MBTA bus), Massachusetts Bay Transportation Authority bus route
 * Hundred and Four (or Council of 104), a Carthaginian tribunal of judges
 * 104 (City of Edinburgh) Field Squadron, Royal Engineers, a Scottish military unit
 * 104 (Tyne) Army Engineer Regiment, Royal Engineers, an English military unit
 * 104 (barge), cargo ship in service in the 1890s
 * 104 Klymene, a main-belt asteroid
 * Peugeot 104, a supermini car