List of state leaders in 664

This is a list of heads of state, government leaders, and other rulers in the year 664.

Asia

• China (Tang Dynasty) - Gaozong, Emperor of China (650–683)
• Japan (Asuka Period) - Tenji, Emperor of Japan (661–672)
• Khmer Empire - Jayavarman I (657-681)
• Korea (Three Kingdoms)
  • Goguryeo - Bojang, King of Goguryeo (642–668)
  • Silla - Munmu, King of Silla (661–681)
• Tibetan Empire – Mangsong Mangtsen (650–677)

Europe

• Byzantine Empire - Constans II (641–668)
• England (Heptarchy) - Oswiu of Northumbria, Bretwalda
  • Kingdom of East Anglia -
    • Aethelwold (655–664)
    • Ealdwulf of East Anglia (664–713)
  • Kingdom of Essex -
    • Swithelm of Essex (660–664)
    • Sighere of Essex (664–683)
    • Sebbi of Essex (664–694)
  • Kingdom of Kent -
    • Eorcenberht (640–664)
    • Ecgberht of Kent (664–673)
  • Mercia - Wulfhere of Mercia, King of Mercia (658–675)
  • Northumbria -
    • Bernicia - Oswiu, King of Bernicia (642–670)
    • Deira - Alchfrith, King of Deira (655–664); no further king mentioned until 670.
  • Kingdom of Sussex -
  • Wessex - Cenwalh, King of Wessex (643–674)
• Frankish Empire -
  • Austrasia - Childeric II, King of Austrasia (662–675)
  • Neustria and Burgundy - Chlothar III, King of Neustria (655–673)
• Great Bulgaria - Khan Kubrat, (632–665)
• Lombard Kingdom - Grimoald I of Benevento (662–671)
• Scotland
  • Dál Riata - Domangart mac Domnaill, King of Dál Riata (660–673)
  • Kingdom of Strathclyde - Elfin of Alt Clut, King of Alt Clut (658–693)
• Visigothic Kingdom - Recceswinth (649–672)
• Wales -
  • Kingdom of Gwynedd - Cadwaladr (655–682)
  • Kingdom of Powys