Asia

• Bohai/Balhae - Da Songlin/Dae Seung-rin , King of Bohai/Balhae (794-808)
• China (Tang Dynasty) - Dezong , Emperor of Tang China (780-805)
• Gurjara - Vatsaraja , Pratihara King of Gurjara (775-805)
• Japan (Heian Period) - Kammu, Emperor of Japan (781-806)
• Silla - Weonseong , King of Silla (785-798)

Europe

• Dalriada - Constantine, King of Dalriada (781–820)
• Essex - Sigeric , King of Essex (758–798)
• Mercia -
  1. Offa, Bretwalda and King of Mercia (757–796)
  2. Ecgfrith, King of Mercia (787–796)
  3. Coenwulf I, King of Mercia (796–821)
  • East Anglia¹ -
    1. Offa, King of East Anglia (794–796)
    2. Eadwald , King of East Anglia (796–799)
  • Kent¹ -
    1. Offa, King of Kent (785–796)
    2. Eadbert II, King of Kent (796–798)
• Northumbria -
  1. Æthelred I , King of Northumbria (790–796)
  2. Osbald , King of Northumbria (796)
  3. Eardwulf , King of Northumbria (796–806/808)
• Ireland - Aedh Oirdnidhe , High King of Ireland (793–817)
• Picts - Constantine, King of the Picts (789–820)
• Strathclyde - Rudderch , King of Strathclyde (780–798)
• Wales - Caradog ap Meirion, King of Gwynedd (754–798)
• Wessex - Beorhtric, King of Wessex (786–802)

Notes

1. Both East Anglia and Kent had been conquered by Offa during his reign over Mercia and, during this time, were sub-states of Mercia.