Warmund was a Catholic bishop of Ivrea who lived from approximately 930 to 1011. Born in Vercelli, he served as the leader of the Ivrea see starting around 966. He is most famously remembered as the namesake of the Warmund Sacramentary, a highly decorated manuscript created for him near the year 1000. His tenure was marked by significant architectural projects at the cathedral in Ivrea and a notable political conflict with the margrave Arduin, which led to his use of excommunication.