John VI
John VI may refer to:
- Pope John VI, Pope from 701 to 705
- John VI of Constantinople, Patriarch of Constantinople from 712 to 715
- John VI, Syriac Orthodox Patriarch of Antioch
- Yohannan VI,, Patriarch of the Church of the East from 1012 to 1016
- Patriarch John VI of Alexandria, Patriarch from 1062 to 1100
- John VI of Naples, Duke from 1097 or 1107 to his death
- Pope John VI of Alexandria, Coptic Pope from 1189 to 1216
- John VI the Affluent, Armenian Catholicos of the Holy See of Cilicia
- John VI Kantakouzenos, Byzantine Emperor from 1347 to 1354
- John VI, Count of Harcourt
- John VI, Duke of Brittany
- John VI, Duke of Mecklenburg
- John VI, Count of Oldenburg
- John VI, Count of Nassau-Dillenburg
- John VI, Prince of Anhalt-Zerbst
- John VI of Portugal, King of the United Kingdom of Portugal, Brazil and the Algarves, King of Portugal and of the Algarves