Norman priest, who was chancellor of England (c. 1072–78) and bishop of Salisbury (1078–99).

According to a 15th-century document, Osmund was the nephew of William the Conqueror. He certainly accompanied the Normans to England, where he was William's chaplain and one of the compilers of Domesday Book. A late document states, probably inaccurately, that he was earl of Dorset. Osmund completed and consecrated the cathedral at Old Sarum, Wiltshire, in 1092, and he organized a cathedral chapter of secular canons similar to Norman chapters, which was copied by other English cathedrals. His liturgical reforms became the basis for the later “Old Sarum” liturgy used throughout the British Isles. After Osmund was canonized, his remains were transferred from Old Sarum to Salisbury Cathedral.