List of state leaders in 780

This is a list of heads of state, government leaders, and other rulers in the year 780.

Africa

• Kingdom of Nekor – Sa'id I ibn Idris (760–803)

America

• Calakmul – Bolon K'awiil II, (c.771-c.789)
• Copán – Yax Pasaj Chan Yopaat (763-aft.810)
• Tikal – Yax Nuun Ayiin II (768-790)

Asia

• Abbasid Caliphate – al-Mahdi, in Baghdad (775–785)
• China (Tang dynasty) – Emperor Dezong (780–805)
• Pratihara Empire – Vatsraja (775–805)
• Japan (Nara period) – Emperor Kōnin (770–781)
• Korea (North South States Period)
  • Balhae – Mun (737–793)
  • Unified Silla –
    1. Hyegong (765–780)
    2. Seondeok (780–785)
• Pala Empire – Dharmapala (770–781)
• Pallava Kingdom – Dantivarman (775–825)
• Rashtrakuta – Krishna I (768–783)
• Tibetan Empire –
  • Trisong Detsen (755–797)

Europe

• Armenia – vacant
• Kingdom of Asturias – Silo (774–783)
• First Bulgarian Empire – Kardam, Khan of Bulgaria (777–803)
• Byzantine Empire –
  1. Leo IV the Khazar (775–780)
  2. Constantine VI (780–797)
• Emirate of Córdoba – Abd al-Rahman I (756–788)
• England (Heptarchy) –
  • Kingdom of East Anglia – Æthelberht II (779–794)
  • Kingdom of Essex – Sigeric (758–798)
  • Kingdom of Kent – Egbert II (764-c.784)
  • Kingdom of Mercia – Offa (757–796)
  • Kingdom of Northumbria – Ælfwald I (779–788)
  • Kingdom of Sussex – Ealdwulf (c.772-c.791)
  • Kingdom of Wessex – Cynewulf (757–786)
• Frankish Empire – Charlemagne (768–814)
• Ireland – Donnchad Midi, High King of Ireland (778–797)
  • Kingdom of Ailech – Máel Dúin mac Áedo (770–788)
  • Kingdom of Connacht – Artgal mac Cathail (777–782)
  • Uí Maine –
    1. Dunchadh ua Daimhine (767–780)
    2. Conall mac Fidhghal (780–782)
  • Kingdom of Leinster – Ruaidrí mac Fáeláin (776–785)
  • Kingdom of Mide – Donnchad Midi (766–797)
  • Kingdom of Ulaid – Fiachnae mac Áedo Róin (749–785)
• Italy -
  • Principality of Benevento – Arechis II of Benevento (774–787)
  • Papal States – Pope Adrian I (772–795)
  • Republic of Venice – Maurizio Galbaio, Doge of Venice (764–787)
• Saxons – Widukind (743–807)
• Principality of Serbia – Višeslav (fl. c.780)
• Scotland -
  • Dál Riata – Fergus mac Echdach (778–781)
  • Kingdom of Strathclyde -
    1. Eugein II of Alt Clut (760-c.780)
    2. Riderch II (c.780-c.798)
  • Kingdom of the Picts –
    1. Alpín II (775–780)
    2. Talorgan II (c.780–782)
• Wales -
  • Kingdom of Gwynedd – Caradog ap Meirion (c.754-c.798)
  • Kingdom of Powys – Cadell ap Elisedd (773–808)