List of state leaders in 816

815 state leaders – Events of 816 – 817 state leaders – State leaders by year

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Africa

• Berghouata - Ilyâs ibn Sâlih (792–842)
• Idrisids - Idris II (791–828)
• Makuria - ?
• Nekor - Salih II ibn Sa'id, King of Nekor (803–864)

America

• Caracol - K'inich Toob'il Yoaat, (810–830)

Asia

• China (Tang Dynasty) - Xianzong, Emperor of Tang China (806–820)
• Gurjara - Nagabhata II, Pratihara King of Gurjara (805–833)
• Japan (Heian Period) - Saga, Emperor of Japan (809–823)
• Khmer empire - Jayavarman II, King of Khmer (802–850)
• Korea (North South States Period)
  • Balhae - Hui, King of Balhae (812–817)
  • Silla - Heondeok, King of Silla (809–826)
• Malwa - Upendra, Paramara King of Malwa (c.800-c.818)
• Pala Empire - Devapala (810–850)
• Pallava - Thandi Varman, King of Pallava (775–825)
• Rashtrakuta - Amoghavarsha, (814–878)
• Tibet -
  • Mu-tig btsan-po, Emperor of Tibet (764–817)
  • Glan dar-ma, Emperor of Tibet (803–841)
  • Ral-pa-can, Emperor of Tibet (806–817)

Europe

• Bulgaria - Omurtag, Khan of the Bulgars (814–831)
• Byzantine Empire - Leo V the Armenian. Roman Emperor (813–820)
• Caucasus
  • Principate of Iberia - Ashot I Kuropalates (c. 813–830)
  • Principality of Kakheti - Grigol, Prince of Kakheti (786–827)
• Kingdom of Denmark - Horik I (813–854)
• England (Heptarchy) -
  • Kingdom of Essex - Sigered (812–825)
  • Mercia - Cenwulf, King of Mercia (796–821) and East Anglia (c.799–821) and King of Kent (807–821)
  • Northumbria - Eanred, King of Northumbria (810–841)
  • Wessex - Egbert, King of Wessex (802–839)
• Frankish Empire - Louis the Pious, King of the Franks and Holy Roman Emperor (814–840)
  • Aquitaine - Louis the Pious, King of Aquitaine (813–817)
  • County of Barcelona - Berà (801–820)
  • Gascony -
    1. Semen Lop of Gascony, Duke of Gascony (c.812-c.816)
    2. Gassia I Semen, Duke of Gascony (816–818)
  • Littoral Croatia - Borna of Croatia, Prince of Littoral Croatia (c.810–821)
  • Toulouse -
    1. Beggo of Paris, Count of Toulouse (806–816)
    2. Berengar the Wise, Count of Toulouse (816–835)
  • County of Urgell - Borell (798–820)
• Ireland - Áed Oirdnide, High King of Ireland (797–819)
  • Ailech - Aed Oirdnide mac Neill, King of Ailech (788–819)
  • Connacht - Diarmait mac Tommaltaig, King of Connacht (815–833)
  • Uí Maine - Cathal mac Murchadh, King of Uí Maine (794–816)
  • Leinster -
    • Muiredach mac Brain, Co-king of Leinster (808–818)
    • Muiredach mac Ruadrach, Co-king of Leinster (808–829)
  • Kingdom of Mide - Conchobar mac Donnchado (803–833)
  • Ulaid - Cairell mac Fiachnai, King of Ulaid (810–819)
• Italy - Bernard, King of Italy (810–818)
  • Principality of Benevento - Grimoald IV of Benevento (806–817)
  • Papal States -
    1. Pope Leo III (795–816)
    2. Pope Stephen IV (816–817)
  • Republic of Venice - Agnello Participazio, Doge of Venice (811–827)
• Pannonian Croatia - Ljudevit Posavski, Duke of the Pannonian Croats (c.810–823)
• Scotland
  • Picts - Caustantin, King of the Picts (787–820)
• Spain -
  • County of Aragon - Aznar I Galíndez - Count of Aragon (809–820)
  • Kingdom of Asturias - Alfonso II (791–842)
  • Caliphate of Córdoba - al-Hakam I (796–822)
• Wales -
  • Kingdom of Gwynedd -
    1. Cynan Dindaethwy ap Rhodri, King of Gwynedd (c.798–816)
    2. Hywel ap Rhodri Molwynog, King of Gwynedd (816–825)
  • Kingdom of Powys - Cyngen ap Cadell (808–855)

Middle East

• Caliphate - al-Ma'mun, Caliph in Baghdad (813–833)
  • Ifriqiya - Abdullah I ibn Ibrahim, Emir of Ifriqiya (812–817)