John VIII may refer to:
- Pope John VIII, Pope from 872 to 882
- Antipope John VIII, antipope in 844
- Patriarch John VIII of Constantinople, Patriarch from 1064 to 1065
- John VIII Palaiologos (1392–1448), Byzantine Emperor
- John VIII, Count of Harcourt, 1398–1424
- John VIII, Count of Vendôme, 1426–1477
- John VIII, Archbishop of Antivari, d. 1571
- John VIII, Count of Nassau-Siegen, 1583–1638
- The mythical Pope Joan, in some versions of her legend
Famous quotes containing the word viii:
“I see and hear daily that you of the Clergy preach one against another, teach one contrary to another, inveigh one against another without charity or discretion. Some be too stiff in their old mumpsimus, others be too busy and curious in their new sumpsimus. Thus all men almost be in variety and discord.”
—Henry VIII (1491–1547)