List of state leaders in 634

See also
List of state leaders in 633 Events of 634 List of state leaders in 635 State leaders by year

This is a list of heads of state, government leaders, and other rulers in the year 634.

America

China (Tang dynasty) – Emperor Taizong (627–649)
Japan (Asuka period) – Emperor Jomei (629–641)
Korea (Three Kingdoms) -
- Baekje – Mu (600–641)
- Goguryeo – Yeongnyu (618–642)
- Silla – Seondeok (632–647)
Western Turkic Khaganate
- Dulu Khan ( 633–634)
- Ishbara Tolis (634–638)

Byzantine Empire – Heraclius (610–641)
England (Heptarchy) –
- Kingdom of East Anglia – Ecgric of East Anglia (629–636)
- Kingdom of Essex – Sigeberht the Little (617–653)
- Kingdom of Kent – Eadbald (616–640)
- Kingdom of Mercia – Penda (c. 626–655)
- Kingdom of Northumbria – Oswald (634–642)
  - Kingdom of Bernicia – Eanfrith of Bernicia (632–634)
  - Kingdom of Deira – Osric of Deira (632–634)
- Kingdom of Sussex –
- Kingdom of Wessex – Cynegils (611–643)
Frankish Empire – Dagobert I (629–634)
- Austrasia – Sigebert III (634–656/660)
- Neustria and Burgundy – Dagobert I (634–639)
Old Great Bulgaria – Kubrat (632–665)
Kingdom of the Lombards – Arioald (626–636)
Scotland
- Kingdom of Dál Riata – Domnall Brecc (629–642)
- Kingdom of Strathclyde – Eugein I of Alt Clut (633–645)
Visigothic Kingdom – Sisenand (631–636)
Wales -
- Kingdom of Gwynedd –
  - Cadwallon ap Cadfan (625–634)
  - Cadafael Cadomedd ap Cynfeddw (634–655)
- Kingdom of Powys – Eiludd Powys (613–642?)