Luigi Bettazzi was an Italian prelate of the Catholic Church who was bishop of Ivrea from 1966 to 1999. One of the youngest and most junior participants in the Second Vatican Council, he was one of the original signatories of the Pact of the Catacombs.

The Diocese of Ivrea is a Latin diocese of the Catholic Church in Piedmont. For a time the diocese included the territory which had once been the diocese of Aosta, suppressed in 1803 but restored in 1817. Up until 1517 Ivrea was a suffragan of the Archdiocese of Milan; it is now a suffragan of the Archdiocese of Turin.