The Roman Catholic Diocese of Digne, is a diocese of the Latin Rite of the Roman Catholic church in France. Erected in the 4th century as the Diocese of Digne, the diocese is now known as the Diocese of Digne, Riez and Sisteron, since 1922. The diocese comprises the entire department of Alpes-de-Haute-Provence, in the Region of Provence-Alpes-Côte d'Azur. The diocese used to be a suffragan of the Archdiocese of Aix until 2002, but is now a suffragan of Marseille.