William de Cornhill (or William of Cornhill; died 1223) was a medieval Bishop of Coventry. Some sources say William was the son of Henry de Cornhill, who was sheriff of London from 1187 to 1189 and was a brother to Reginald de Cornhill, one of John's chief administrators. Other sources say that William was either Reginald's son or nephew. William served King John of England as a financial administrator, and in 1206 he the custodian of Malmesbury Abbey and the see of Winchester and the see of Lincoln. He was archdeacon of Huntingdon by 1209, when he was serving as a royal justice. In 1212 he once more served as a royal justice. He was elected bishop about 9 July 1214, and consecrated on 25 January 1215. His election involved the monks of Coventry refusing to allow the canons of Lichfield pa