List of state leaders in 451

See also
List of state leaders in 450 Events of 451 List of state leaders in 452 State leaders by year List of religious leaders in 451

This is a list of heads of state, government leaders, and other rulers in the year 451.

Africa

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

China (Southern and Northern Dynasties) -
- Liu Song Dynasty - Emperor Wen, Emperor of Liu Song (424–453)
- Northern Wei Dynasty - Emperor Taiwu, Emperor of Northern Wei (424–452)
Gupta Empire - Kumara Gupta I, Gupta Emperor (415–455)
Japan (Kofun Era) - Emperor Ingyō, Emperor of Japan (c. 411-c. 453)
Korea (Three Kingdoms) -
- Baekje - Biyu, King of Baekje (427–454)
- Goguryeo - Jangsu, King of Goguryeo (413–490)
- Silla - Nulji, King of Silla (417–458)
Pallava - Simha Varman II, King of Pallava (438–460)

Kingdom of Burgundy
- Gundioc (436–473)
- opposed by Chilperic I (443-c.480)
Byzantine Empire - St. Marcian (450–457)
Suebic Kingdom of Galicia - Rechiar (448–456)
Hun Empire - Atilla, King of the Huns (c.437–453)
Ireland - Lóegaire mac Néill, High King of Ireland (c. 428-c. 458)
Britain - Vortigern, King of the Britons (c.425–452)
Salian Franks - Merowig, King of Salian Franks (447–457)
Visigothic Kingdom
- Theodoric I (419–451)
- Thorismund (451–453)
Western Roman Empire - Valentinian III (425–455)