John of Valois, the Magnificent, (November 30, 1340 – March 15, 1416) was Duke of Berry and Auvergne and Count of Poitiers and Montpensier. He was the third son of King John II of France and Bonne of Luxemburg; amongst his siblings were Charles V, King of France, Louis I, King of Naples and Philip II, Duke of Burgundy.

In the middle of the Hundred Years' War and serious internal conflicts, John was a consensual figure in France. He acted several times as a peace maker between French factions and is notable by his attempts of peace between his nephews Louis of Valois, Duke of Orléans and John, Duke of Burgundy.

John of Berry had the following issue by his first wife, Joanna of Armagnac (1346-1387):

• Charles of Berry, Count of Montpensier (1362-1382)
• John of Berry, Count of Montpensier (1363-1402), married princess Catherine of France
• Louis of Berry (1364-1383)
• Bonne of Berry (1365-1435), married Bernard VII, Count of Armagnac
• Mary of Berry, Duchess of Auvergne (1367-1434), married: 1) Louis III of Chatillon, Count of Dunois; 2) Philip of Artois, Count d'Eu; 3) John I, Duke of Bourbon