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.

The Archdiocese of Modena–Nonantola is a Latin archdiocese of the Catholic Church in Italy. It existed as the Diocese of Modena in central Italy from the 4th century. Originally it was a suffragan the diocese of Milan, but later became a suffragan of Ravenna. Because of the schism of the Antipope Clement III, Pope Paschal II released Modena from obedience to the church of Ravenna, but Pope Gelasius II restored the previous status. Modena continued as a suffragan of Ravenna until 1582, when the Archdiocese of Bologna was created by Pope Sixtus V in the Bull Universi orbis of 1 December 1582, and was assigned Modena as one of its suffragans.