List of state leaders in 678

677 state leaders - Events of 678 - 679 state leaders - State leaders by year----------

Africa

America

Asia

*China (Tang Dynasty) - Gaozong, Emperor of China (650-683)
*Japan (Asuka period) - Temmu, Emperor of Japan (672-686)
*Khmer Empire - Jayavarman I (657-681)
*Silla - Munmu, King of Silla (661-681)

Europe

*England (Heptarchy) - Oswiu of Northumbria, Bretwalda
**East Anglia - Ealdwulf, King of East Anglia (663-713)
**Essex - Sighere, King of Essex (664-683)
**Kent
**Mercia
**Northumbria
***Ecgfrith, King of Northumbria (670-685)
***Deira - Aelfwine, King of Deira (670-679)
**Sussex - Aethelwalh, King of Sussex (c.660-c.685)
**Wessex

*Austrasia - Dagobert II, King of Austrasia (676-679)
**Frisia -
**#Adgild, Duke of Friesland (died in 678)
**#Radbod, King of the Frisians (Several succeeding Frisian kings had this name)
*Great Bulgaria - Khan Asparuh (668-700)

Middle East