Margaret of Valois, Countess of Blois

Margaret of Valois (1295–1342) was a French princess of the Valois line, daughter of Charles, Count of Valois, and Margaret of Anjou, and elder sister of King Philip VI. In 1311 she married Guy I de Châtillon, Count of Blois, tying the Blois comital house to the Valois royal line.

Her children were Louis, who succeeded as Count of Blois and fell at Crécy in 1346, Charles of Blois, the beatified duke of Brittany, and Marie, who married Rudolf, Duke of Lorraine.