List of state leaders in 503

This is a list of heads of state, government leaders, and other rulers in the year 503.

America

• Palenque - Ahkal Mo' Naab' I, Ajaw of Palenque (501–524)

Asia

• China (Southern and Northern Dynasties) -
  • Liang Dynasty - Emperor Wu, Emperor of Liang (502–549)
  • Northern Wei Dynasty - Emperor Xuanwu, Emperor of Northern Wei (499–515)
• Japan (Kofun Era) - Emperor Buretsu, Emperor of Japan (c. 498-c. 507)
• Korea (Three Kingdoms) -
  • Baekje - Muryeong, King of Baekje (501–523)
  • Goguryeo - Munjamyeong, King of Goguryeo (491–519)
  • Silla - Jijeung, King of Silla (500–514)

Europe

• Anglo-Saxon Heptarchy - Aelle, Bretwalda (c. 477-c. 514)
  • South Saxons - Aelle, King of the South Saxons (c. 477-c. 514)
  • Kingdom of Kent - Oisc (488-c. 512)
• Kingdom of Burgundy - Gundobad (473–516)
• Byzantine Empire - Anastasius I (491–518)
• Gaul - Clovis I, King of the Franks (481–511)
• Ireland - Lughaid mac Loeguire, High King of Ireland (479–503)
• Italy - Theodoric I, King of the Ostrogoths in Italy (493–526)
• Visigothic Kingdom - Alaric II (484–507)