List of state leaders in 457

Africa

*Kingdom of the Vandals and Alans - Geiseric, King of the Vandals and Alans (428-477)

America

*Palenque - "Casper", Ajaw of Palenque (435-487)

Asia

*China (Southern and Northern Dynasties) -
** Liu Song Dynasty - Emperor Xiaowu, Emperor of Liu Song (454-464)
** Northern Wei Dynasty - Emperor Wencheng, Emperor of Northern Wei (452-465)
*Gupta Empire - Skanda Gupta, Gupta Emperor (455-467)
*Japan (Kofun Era) - Emperor Yūryaku, Emperor of Japan (c.456-c.479)
*Korea (Three Kingdoms) -
**Baekje - Gaero, King of Baekje (454-475)
**Goguryeo - Jangsu, King of Goguryeo (413-490)
**Silla - Nulji, King of Silla (417-458)
*Pallava - Simha Varman II, King of Pallava (438-460)

Europe

*Burgundy
** Gundioc, King of Burgundy (436-473)
** opposed by Chilperic I (443-c.480)
*Byzantine Empire
**St. Marcian, Byzantine Emperor (450-457)
**Leo I, Byzantine Emperor (457-474)
*Ireland - Lóegaire mac Néill, High King of Ireland (c. 428-c. 458)
*Kent
**Hengest, King of Kent (c. 455-488)
**Horsa, King of Kent (c. 455-488)
*Salian Franks
**Merowig, King of Salian Franks (447-457)
**Childeric I, King of Salian Franks (457-481)
*Visigoths - Theodoric II, King of the Visigoths (453-466)
*Western Roman Empire - Majorian, Western Roman Emperor (457-461)

Middle East

*Sassanid Empire
**Yazdegerd II, Sassanid King (438-457)
**Hormizd III, Sassanid King (457-459)
**Peroz I, Sassanid King (457-484)