Wiliamu wa York (mwishoni mwa karne ya 11 – York, Uingereza, 8 Juni 1154) alikuwa askofu wa York, Uingereza kuanzia mwaka 1141 hadi 1147, tena kuanzia 1154 hadi kifo chake kilichosemekana kusababishwa na sumu iliyotiwa katika kikombe cha ekaristi. Tangu kale anaheshimiwa na Wakatoliki kama mtakatifu. Papa Honori III alimtangaza hivyo tarehe 18 Machi 1226. Sikukuu yake huadhimishwa tarehe 8 Juni. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko Emma J. Wells, "Making Sense of Things", History Today, Vol. 69, No. 5 (May 2019), p. 40. http://www.santiebeati.it/dettaglio/56450 Martyrologium Romanum Burton, Janet (1994). Monastic and Religious Orders in Britain: 1000–1300, Cambridge Medieval Textbooks. Cambridge UK: Cambridge University Press. ISBN 0-521-37797-8.  Burton, Janet (2004). "William of York (d. 1154)". Oxford Dictionary of National Biography. Oxford University Press. doi:10.1093/ref:odnb/9606 . http://www.oxforddnb.com/view/article/9606. Retrieved 17 March 2008. Crouch, David (2000). The Reign of King Stephen: 1135–1154. New York: Longman. ISBN 0-582-22657-0.