Asia

• Bohai/Balhae - Da Yizhen/Dae I-jin , King of Bohai/Balhae (830-857)
• China (Tang Dynasty) - Wuzong, Emperor of Tang China (840-846)
• Gurjara - Mihira Bhoja I , Pratihara King of Gurjara (c. 836-886)
• Japan (Heian Period) - Nimmyo, Emperor of Japan (833-850)
• Silla - Munseong , King of Silla (839-857)

Europe

• East Anglia¹ - Æthelweard , King of East Anglia (839–855)
• England - Æthelwulf of Wessex, Bretwalda (839–856)
• Mercia - Beorhtwulf, King of Mercia (840–852)
• Northumbria¹ -
  1. Æthelred II , King of Northumbria (841–844)
  2. Raedwulf , King of Northumbria (844–844)
  3. Æthelred II , King of Northumbria (844–849)
• Ireland -
  • Nial Caille , High King of Ireland (832–844)
  • Turgesius of Norway , High King of Ireland (832–845)
• Picts² - Brude VII , King of the Picts (843–845)
• Scotland - Kenneth I, King of Scots and Picts (843–858)
• Strathclyde - Arthgal f Dyfnwal , King of Strathclyde (816–872)
• Wales -
  1. Merfyn Frych ap Gwriad , King of Gwynedd (825–844)
  2. Rhodri Mawr ap Merfyn, King of Gwynedd (844–878)

Notes

1. Though East Anglia, Northumbria and Mercia are traditionally perceived to have been in the heptarchy they were largely independent kingdoms until its conquest by the Danes in 869 and 867, respectively - where Mercia was conquered by Wessex in 874. All other members of the heptarchy had been conquered by Wessex and by this time had no form or king.
2. Kenneth had merged Dalriada and the Pictish kingdom the year previous (843). There are, however, records for kings of the Picts until 848.