List of state leaders in 621

This is a list of heads of state, government leaders, and other rulers in the year 621.

America

• Palenque (Mayas) – K'inich Janaab' Pakal (Pacal II the Great) (615–683)

Asia

• Chalukya – Pulakesi II (609–642)
• China (Tang dynasty) – Emperor Gaozu (618–626)
• Japan (Asuka period) - Empress Suiko (593–628)
• Korea (Three Kingdoms) -
  • Baekje – Mu (600–641)
  • Goguryeo – Yeongnyu (618–642)
  • Silla – Jinpyeong (579–632)
• Northern India – Harsha of Kannauj (606–648)
• Turkic Khaganate
  • Eastern Turkic Khaganate
    1. Chuluo Khan (619–621)
    2. Jiali Khan (621–630)
  • Western Turkic Khaganate- Tong Yabghu Qaghan (618–630)

Europe

• Eurasian Avars – Organa (617–630)
• Byzantine Empire – Heraclius (610–641)
• England (Heptarchy) – Rædwald of East Anglia, Bretwalda
  • Kingdom of East Anglia – Rædwald of East Anglia (593–624)
  • Kingdom of Essex – Sigeberht I (617–653)
  • Kingdom of Kent – Eadbald (616–640)
  • Kingdom of Northumbria – Edwin (616–632)
  • Kingdom of Wessex – Cynegils (611–643)
• Frankish Empire – Clotaire II (Merovingians) (613–629)
• Lombard Kingdom – Adaloald (616–626)
• Scotland
  • Kingdom of Dál Riata – Eochaid Buide (608–629)
  • Kingdom of Strathclyde –
    • Neithon of Alt Clut (617–621)
    • Bili I (621–633)
• Visigothic Kingdom –
  • Sisebut (612–621)
  • Reccared II (621)
  • Suintila (621–631)
• Wales -
  • Kingdom of Gwynedd – Cadfan ap Iago (613-c.625)

Middle East

• Byzantine Empire – Heraclius (610–641)