William of York was an 11th-century English priest and a two-time Archbishop of York. Born William fitzHerbert, he was likely related to King Stephen, whose support helped him secure his initial election. His tenure was marked by intense conflict with the Cistercian order, who successfully campaigned for his deposition in 1147. After years of seeking reinstatement, he was finally restored to his see in 1153. He died shortly after his return to York in 1154, with some accounts suggesting he was poisoned during the celebration of Mass.