Margaret of Valois, Countess of Blois

Margaret of Valois (1295–1342) was a French noblewoman. She was a daughter of Charles, Count of Valois, and his first wife, Margaret, Countess of Anjou. She was also a sister of King Philip VI of France.

In 1310, she married Guy I of Châtillon, Count of Blois. They had three children together:
 * Louis II of Châtillon, Count of Blois (d. 1346) and Lord of Avesnes, married Jeanne of Hainault, Countess of Soissons.
 * Charles of Blois, Duke of Brittany (d. 1364), married Joan of Penthièvre, Duchess of Brittany.
 * Marie of Blois, married:
 * in 1334 to Rudolph, Duke of Lorraine (d. 1346)
 * Frederick VII of Leiningen, Count of Leiningen-Dagsburg.