William de Corbeil was Archbishop of Canterbury from 1123 to 1136, serving during the reigns of Henry I of England ⓘ and Stephen. A canon regular of the Order of St Augustine ⓘ, he was one of the first members of that reforming movement to hold the archbishopric of Canterbury.

Before his election, William had been prior of the Augustinian house at St Osyth in Essex. In 1123 he was elected Archbishop of Canterbury, a choice supported by Pope Calixtus II, whose confirmation strengthened papal influence in the English church. His appointment occurred during a long-standing dispute over primacy between Canterbury and York, and the pope granted him the office of papal legate in England, thereby reinforcing his authority over the English episcopate.

During his archiepiscopate William presided over church councils, worked to maintain ecclesiastical discipline, and supported the continued development of reform within the English church. He also played an important ceremonial role in the monarchy, crowning King Stephen in 1135 following the death of Henry I.

William is also remembered as the patron of the keep of Rochester Castle, one of the most impressive surviving examples of Norman military architecture, constructed during his tenure as archbishop.