Niphon or Nephon may refer to:
Japan (Nippon, Nihon) or the main island Honshu Saint Niphon of Constantia (4th century), Bishop of Constantia on Cyprus, feast day December 23 Saint Niphont of Novgorod (died 1156), Bishop of Novgorod, feast day April 8 Nephon I of Constantinople (died 1328), Ecumenical Patriarch of Constantinople 1310–1314 Niphon of Alexandria, Greek Patriarch of Alexandria 1366–1385 Saint Niphon Kausokalybites of Mount Athos (1316–1411), Greek Orthodox monk Saint Nephon II of Constantinople (died 1508), Ecumenical Patriarch of Constantinople 1486–1488, 1497–1498, and 1502 USS Niphon (1863), a steam ship of Union Navy in the American Civil War Niphon spinosus, a species of marine ray-finned fish commonly called the ara