The Diocese of Parma is a Latin diocese of the Catholic Church. It has properly been called Diocese of Parma-Fontevivo since 1892. The bishop's seat is in Parma Cathedral. The diocese is a suffragan of the Archdiocese of Modena-Nonantola.

Parma Cathedral is a Roman Catholic cathedral in Parma, Emilia-Romagna (Italy), dedicated to the Assumption of the Blessed Virgin Mary. It is the episcopal seat of the Diocese of Parma. It is an important Italian Romanesque cathedral: the dome, in particular, is decorated by a highly influential illusionistic fresco by Renaissance painter Antonio da Correggio.