List of state leaders in 838

This is a list of heads of state, government leaders, and other rulers in the year 838.

Asia

• Abbasid Caliphate – al-Mu'tasim (833–842)
• China (Tang dynasty) – Emperor Wenzong (826–840)
• Pratihara Empire – Mihira Bhoja I (c. 836–886)
• Japan (Heian period) – Emperor Ninmyō (833–850)
• Korea (North South States Period)
  • Balhae – Dae Ijin (830–857)
  • Unified Silla –
    1. Huigang (836–838)
    2. Minae (838–839)

Europe

• First Bulgarian Empire – Presian, Khan of the Bulgars (836–852)
• Byzantine Empire – Theophilos (829–842)
• Caucasus
  • Principality of Iberia – Bagrat I Kuropalates (830–876)
  • Principality of Kakheti – Vache (827–839)
• Kingdom of Denmark – Horik I (813–854)
• England (Heptarchy) – Egbert of Wessex, Bretwalda (829–839)
  • Kingdom of East Anglia – Æthelstan (826–c. 839)
  • Kingdom of Kent – Egbert of Wessex (825–839)
  • Kingdom of Mercia – Wiglaf (830–839)
  • Kingdom of Northumbria – Eanred (810–841)
  • Kingdom of Wessex – Egbert (802–839)
• Frankish Empire –
  • Louis the Pious, King of the Franks and senior Holy Roman Emperor (814–840)
  • Lothair I, King of Italy and junior Holy Roman Emperor (817–855)
  • Kingdom of Aquitaine –
    1. Pepin I (817–838)
    2. Pepin II (838–851/852)
    3. Charles the Bald (838–855)
    • Auvergne – Guerin of Provence, Count of Auvergne (819–839)
    • County of Vasconia – Sans II Sancion of Gascony (836–864)
    • County of Toulouse – Bernard of Septimania (835–842)
  • County of Barcelona – Bernard of Septimania (835–844)
  • Duchy of Bavaria – Louis the German (817–843)
  • Duchy of Croatia – Mislav of Croatia (835–845)
  • County of Maine – Rorgon I (832–840)
  • County of Nantes – Ricwin (831–841)
  • County of Poitiers – Emenon (828–839)
  • County of Urgell – Sunifred, Count of Barcelona (834–848)
• Ireland – Niall Caille, High King of Ireland (833–846)
  • Kingdom of Ailech – Niall Caille (823–846)
  • Kingdom of Connacht – Cathal mac Muirgiussa (833–839)
  • Uí Maine – Cathal mac Ailell (834–844)
  • Kingdom of Leinster –
    1. Bran mac Fáeláin (835–838)
    2. Ruarc mac Brain (838–847)
  • Kingdom of Mide – Máel Ruanaid mac Donnchada Midi (833–843)
  • Kingdom of Munster – Fedelmid mac Crimthainn (820–847)
  • Kingdom of Ulaid – Muiredach mac Eochada (825–839)
• Kingdom of Italy – Lothair I, King of Italy and junior Holy Roman Emperor (818–855)
  • Principality of Benevento – Sicard of Benevento (832–839)
  • Papal States – Pope Gregory IV (827–844)
  • Duchy of Spoleto – Berengar (836–841)
  • Republic of Venice – Pietro Tradonico, Doge of Venice (836–864)
• Pannonian Croatia – Ratimir (829–838)
• Scotland
  • Kingdom of the Picts – Eóganan mac Óengusa (836/837–839)
• Principality of Serbia – Vlastimir (835–850)
• Spain –
  • County of Aragon – Galindo Garcés (833–844)
  • Kingdom of Asturias – Alfonso II (791–842)
  • Emirate of Córdoba – Abd ar-Rahman II (822–852)
  • Kingdom of Pamplona – Íñigo Arista (824–851/852)
• Wales –
  • Kingdom of Gwynedd – Merfyn Frych (825–844)
  • Kingdom of Powys – Cyngen ap Cadell (808–855)