List of state leaders in 655

654 state leaders - Events of 655 - 656 state leaders - State leaders by year

Africa

America

Asia

• China (Tang Dynasty) - Gaozong, Emperor of China (650–683)
• Japan (Asuka Period) - Saimei, Empress of Japan (655–661)
• Korea (Three Kingdoms) -
  • Baekje - Uija, King of Baekje (641–660)
  • Goguryeo - Bojang, King of Goguryeo (642–668)
  • Silla - Muyeol, King of Silla (654–661)

Europe

• Byzantine Empire - Constans II (641–668)
• England (Heptarchy) - Oswiu of Northumbria, Bretwalda
  • Kingdom of East Anglia -
    • Aethelhere (654–655)
    • Aethelwold (655–664)
  • Kingdom of Essex - Sigeberht II of Essex (653–660)
  • Kingdom of Kent - Eorcenberht (640–664)
  • Mercia -
    • Penda, King of Mercia (c.626–655)
    • Peada, King of Mercia (655–656)
  • Northumbria -
    • Bernicia - Oswiu, King of Bernicia (642–670)
    • Deira -
      • Aethelwald, King of Deira (651–655)
      • Alchfrith, King of Deira (655–664)
  • Kingdom of Sussex -
  • Wessex - Cenwalh, King of Wessex (643–674)
• Frankish Empire -
  • Austrasia - Sigebert III, King of Austrasia (634–656/660)
  • Neustria and Burgundy -
    • Clovis II, King of Neustria (639–655)
    • Chlothar III, King of Neustria (655–673)
• Great Bulgaria - Khan Kubrat, (632–665)
• Lombard Kingdom - Aripert I (653–661)
• Moravia - Samo, King of the Slavs (623–658)
• Scotland
  • Dál Riata - Conall Crandomna, King of Dál Riata (650–660)
  • Kingdom of Strathclyde - Gwriad (645–658)
• Visigothic Kingdom - Recceswinth (649–672)
• Wales -
  • Kingdom of Gwynedd -
    • Cadafael Cadomedd ap Cynfeddw (634–655)
    • Cadwaladr (655–682)
  • Kingdom of Powys

Middle East

• Caliphate - Uthman ibn Affan (644–656)
• Byzantine Empire - Constans II (641–668)