List of state leaders in 637

636 state leaders - Events of 637 - 638 state leaders - State leaders by year

Africa

America

• Mayas - Pacal II, Ruler of Palenque (615–683)

Asia

• China (Tang Dynasty) - Taizong, Emperor of China (627–649)
• Japan (Asuka Period) - Jomei, Emperor of Japan (629–641)
• Korea (Three Kingdoms) -
  • Baekje - Mu, King of Baekje (600–641)
  • Goguryeo - Yeongnyu, King of Goguryeo (618–642)
  • Silla - Seondeok, Queen of Silla (632–647)

Europe

• Byzantine Empire - Heraclius (610–641)
• England (Heptarchy) -
  • Kingdom of East Anglia - Anna of East Anglia (ca. 635-ca. 653)
  • Kingdom of Essex - Sigeberht I (617–653)
  • Kingdom of Kent - Eadbald (616–640)
  • Mercia - Penda, King of Mercia (ca.626–655)
  • Northumbria - Oswald, King of Northumbria (634–642)
  • Kingdom of Sussex -
  • Wessex - Cynegils, King of Wessex (611–643)
• Frankish Empire -
  • Austrasia - Sigebert III, King of Austrasia (634–656/660)
  • Neustria and Burgundy - Dagobert I, King of Neustria (634–639)
• Great Bulgaria - Khan Kubrat, (632–665)
• Lombard Kingdom - Rothari (636–652)
• Moravia - Samo, King of the Slavs (623–658)
• Scotland
  • Dál Riata - Domnall Brecc, King of Dál Riata (629–642)
  • Kingdom of Strathclyde - Eugein I of Alt Clut (633–645)
• Visigothic Kingdom - Chintila (636–640)
• Wales -
  • Kingdom of Gwynedd - Cadafael Cadomedd ap Cynfeddw (634–655)
  • Kingdom of Powys - Eiludd Powys (613–642?)

Middle East

• Byzantine Empire - Heraclius (610–641)