William of Bures (died 1142) was a French crusader from Bures-sur-Yvette, Ile-de-France. He arrived in the Kingdom of Jerusalem before 1115, with his brother Geoffrey. They were vassals of Joscelin I of Edessa. In 1119 they took part in a raid into Turkish territory over the Jordan River, and Geoffrey was killed. William became Prince of Galilee when Joscelin took over Edessa. He died childless, and was succeeded as Prince of Galilee by his nephew Elinard of Bures, son of Geoffrey.