List of saints named Leo

St. Leo may refer to one of several saints named Leo, including:

• Leo of Patara (died c. 260), early Christian martyr
• Leo of Montefeltro (died 366), bishop of Montefeltro
• Pope Leo I the Great (died 461), Pope of Rome
• Emperor Leo I the Great (died 474), Eastern Roman Emperor
• Leo of Cappadocia (died c. 580)
• Pope Leo II (died 683), Pope of Rome
• Leo of Catania (died c. 785), Wonderworker and bishop of Catania in Sicily
• Leo of Bayonne, France (died c. 890), feast day March 1