List of state leaders in 870

This is a list of heads of state, government leaders, and other rulers in the year 870.

Asia

• Champa – Vikrantavarman III (854–875)
• China (Tang dynasty) – Emperor Yizong (859–873)
• Pratihara Empire – Mihira Bhoja I (c. 836–886)
• Japan (Heian period) – Emperor Seiwa (858–876)
• Khmer Empire – Jayavarman III (850–877)
• Khorasan (Saffarid dynasty) – Ya'qub ibn al-Layth al-Saffar (858–876)
• Korea (North South States Period)
  • Balhae – Dae Geonhwang (857–871)
  • Unified Silla – Gyeongmun (861–875)
• Rashtrakuta – Amoghavarsha I (814–878)

Europe

• First Bulgarian Empire – Boris I, Knyaz of Bulgaria (852–889)
• Byzantine Empire – Basil I the Macedonian (867–886)
• Caucasus
  • Principality of Iberia – Bagrat I Kuropalates (830–876)
  • Principality of Kakheti – Gabriel (861–881)
  • Tao-Klarjeti – Sumbat I (c. 870–889)
• Duchy of Croatia – Domagoj (864–876)
• Kingdom of Denmark – Bagsecg (c. 866–c. 871)
• England (Heptarchy) –
  • Danelaw –
    • Kingdom of East Anglia – Oswald (869–876)
    • Kingdom of Northumbria² – Ecgberht I (867–872)
  • Kingdom of Mercia – Burgred (852–874)
  • Kingdom of Wessex – Æthelred (865–871)
• East Francia – Louis the German (843–876)
  • Duchy of Alsace – Hugh (867–885)
  • Duchy of Saxony – Bruno (866–880)
  • Duchy of Thuringia – Thachulf (849–873)
• West Francia – Charles the Bald (843–877)
  • County of Angoulême – Wulgrin I (866–886)
  • Kingdom of Aquitaine – Louis the Stammerer (866–877)
  • County of Auxerre – Hugh the Abbot (866–870)
  • County of Barcelona – Bernard II (865–878)
  • Duchy of Brittany – Salomon (857–874)
  • County of Flanders – Baldwin I (862–879)
  • County of Maine – Gauzfrid (865–878)
  • March of Neustria – Gauzfrid, Count of Maine (865–878)
  • County of Poitiers – Bernard of Gothia (866–877)
  • County of Toulouse – Bernard II (865–877)
  • County of Tours – Hugh the Abbot (866–886)
  • County of Troyes – Odo I, Count of Troyes (866–871)
  • County of Urgell – Wilfred the Hairy (870–897)
• Duchy of Gascony – Sans III Mitarra (864–893)
• Ireland – Áed Findliath, High King of Ireland (862–879)
  • Kingdom of Ailech – Áed Findliath(c. 855–879)
  • Kingdom of Connacht – Mugron mac Máel Cothaid (848–872)
  • Uí Maine –
  • Kingdom of Leinster – Ailill mac Dúnlainge (869–871)
  • Kingdom of Mide – Donnchad mac Aedacain (864–877)
  • Kingdom of Munster – Cenn Fáelad hua Mugthigirn (861–872)
  • Kingdom of Osraige – Cerball mac Dúnlainge (842–888)
  • Kingdom of Ulaid –
  • Cathalán mac Indrechtaig, co-king (857–871)
  • Lethlobar mac Loingsig, co-king (857–873)
• Kingdom of Italy – Louis II (855–875)
  • Principality of Benevento – Adelchis (854–878)
  • County of Capua – Landulf II (863–879)
  • March of Friuli – Unruoch III (863–874)
  • Duchy of Gaeta – Docibilis I, Hypatus of Gaeta (866–906)
  • Duchy of Naples –
    1. Gregory III (864–870)
    2. Sergius II (870–877)
  • Papal States – Pope Adrian II (867–872)
  • Principality of Salerno – Guaifer (861–880)
  • Duchy of Spoleto – Lambert I (860–871)
  • March of Tuscany – Adalbert I (847–886)
  • Republic of Venice – Orso I Participazio, Doge of Venice (864–881)
• Great Moravia –
  1. Rastislav (846–870)
  2. Svatopluk I (870–894)
  • Duchy of Bohemia – Bořivoj I (c. 870–c. 889)
• Novgorod – Rurik, Prince of Novgorod (862–879)
• Scotland –
  • Kingdom of the Picts – Constantine I (862–877)
• Principality of Serbia – Mutimir, Grand Župan (850–891)
• Spain –
  • County of Aragon – Aznar Galíndez II (867–893)
  • Kingdom of Asturias – Alfonso III (866–910)
    • County of Castile – Rodrigo of Castile (860–873)
    • County of Portugal – Vímara Peres (868–873)
  • Emirate of Córdoba – Muhammad I (852–886)
  • Kingdom of Pamplona – García Íñiguez (851/852–882)
• Wales –
  • Kingdom of Gwynedd – Rhodri the Great (844–878)
  • Kingdom of Powys – Rhodri the Great (855–878)

Middle East

• Byzantine Empire – Basil I the Macedonian (Βασίλειος Α'), (867–886)
• Abbasid Caliphate
  • Al-Muhtadi (869–870)
  • Al-Mu'tamid (870–892)