Jean de Montfort
Jean de Montfort or John of Montfort may refer to:
- John I of Montfort, count of Montfort
- Jean de Montfort (died 1283), lord of Tyre and of Toron
- Jean de Montfort-Castres, count of Squillace, son of Philippe II de Montfort, lord of Castres, and of Jeanne de Lévis-Mirepoix
- John II of Montfort, count of Montfort, contested Duke of Brittany, one of two sides in the Breton War of Succession
- John IV, Duke of Brittany, son of the former, Duke of Brittany from 1364 to 1399, count of Richemont and count of Montfort
- Jean de Montfort, who later took the name Guy XIII de Laval, Lord of Laval