The Diocese of Nice is a Latin diocese of the Catholic Church in France. The diocese comprises the Department of Alpes-Maritimes. The diocese is a suffragan of the Archdiocese of Marseille.

The Diocese of Fréjus–Toulon is a Latin diocese of the Catholic Church in southeastern France on the Mediterranean coast. The present diocese comprises the territory of the ancient Diocese of Fréjus as well as that of the ancient Diocese of Toulon. In 1957 it was renamed as the Diocese of Fréjus–Toulon.