John Palaiologos
John Palaiologos or Palaeologus may refer to:
- John Palaiologos (brother of Michael VIII), general, brother of Byzantine emperor Michael VIII
- John Palaiologos (son of Andronikos II), governor of Thessalonica
- John Palaiologos (Caesar), governor of Thessalonica
- John II, Marquess of Montferrat, Marquess of Montferrat in 1338–1372
- John V Palaiologos, Byzantine emperor in 1341–1391, with interruptions
- John III, Marquess of Montferrat, Marquess of Montferrat in 1378–1381
- John VII Palaiologos, Byzantine emperor in 1390
- John VIII Palaiologos, Byzantine emperor in 1425–1448
- John IV, Marquess of Montferrat, Marquess of Montferrat in 1445–1464
- John Theodore Paleologus, possibly a descendant of Thomas Palaiologos, Despot of the Morea