Boniface of Valperga (Italian: Bonifacio di Valperga; died 25 April 1243), venerated as a blessed in the Catholic Church, was a thirteenth-century Bishop of Aosta. Boniface was born in the second half of the twelfth century into a noble family of the Canavese which claimed descent from Arduino d’Ivrea. He was educated at home and subsequently by his uncle Arduino, Bishop of Turin. He entered the religious life as a monk at the Benedictine abbey of Fruttuaria, about twenty kilometres north of Turin. Subsequently he entered the Augustinian monastery of Sant’Orso at Aosta where, having been made Prior in 1210, he exerted a vigorous leadership in both the spiritual and temporal realms. On 17 July 1219 Boniface was made Bishop of Aosta, an office which he retained until his death nearly 24 year