List of heads of state 780

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Africa

• Rustamids
  • Imam : 'Abd al-Rahman ibn Rustam (778-788)

America

• Maya
  • Copan
    • Ruler : Yax Pasaj Chan Yoaat (762-820)
  • Palenque
    • Ruler : K'inich K'uk 'Bahlam II. (764 – approx. 785)
  • Tikal
    • Ruler : Yax Nuun Ayiin II (768–794)

Asia

• Bagan
  • King : Shwemauk (762–785)

• China
  • Emperor : Tang Dezong (779-805)

• Iberia (Kartlien)
  • King : Nerse I (760-780)
  • King: Stefanos III. (780-786)

• India
  • Eastern Chalukya
    • King : Vishnuvardhana IV (772–808)
  • Pala
    • King : Dharmapala (775-810)
  • Pallava
    • King : Thandi Varman (775-825)
  • Pandya
    • King : Parantaka Nedunjadaiyan (765–790)
  • Pratihara
    • King : Vatsaraja (775-805)
  • Rashtrakuta
    • King : Govinda II. (774-780)
    • King: Dhruva Dharavarsha (780–793)

• Japan
  • Emperor : Kōnin (770-781)

• cashmere
  • King : Jayapida (779-813)

• Korea
  • Balhae
    • King : Sejong Mun (738–794)
  • Silla
    • King : Hyegong (765-780)
    • King: Seondeok (780–785)

• Caliphate of the Muslims
  • Caliph : al-Mahdi (775-785)

• Nanzhao
  • King : Meng Yimouxun (779–808)

• Tibet
  • King : Thrisong Detsen (755–796)

Europe

• Bulgaria
  • Khan : Cardam (777-803)

• Byzantine Empire
  • Emperor : Leo IV (775-780)
  • Emperor: Constantine VI. (780-797)

• England ( heptarchy )
  • East Anglia
    • King : Æthelred I (760–780)
    • King: Æthelberht II. (780–794)
  • Essex
    • King : Sigeric I. (approx. 760–798)
  • Kent
    • King: Heahberht (765–785)
  • Mercia
    • King : Offa (757-796)
  • Northumbria
    • King : Ælfwald I. (778 / 779–788)
  • Wessex
    • King : Cynewulf (757–786)

• Frankish Empire
  • King: Charlemagne (768–814)
  • Toulouse county
    • Count : Chorso (778–790)

• Italy
  • Papal States
    • Pope : Hadrian I (772-795)
  • Venice
    • Doge of Venice : Maurizio Galbaio (764–787)

• Scotland
  • Dalriada
    • King : Fergus II (778–781)
  • Strathclyde
    • King : Eugein II (760-780)
    • King: Riderch II. (780 – approx. 810)
  • Picts
    • King : Alpin II. (775-780)
    • King: Drust mac Talorcan (780–781)

• Spain
  • Asturias
    • King : Silo (774–783)
  • Emirate of Cordoba
    • Emir: Abd ar-Rahman I (756–788)

• Wales
  • Gwynedd
    • King : Caradog ap Meirion (754–798)
  • Powys
    • Prince: Cadell ap Brochfael (773–808)