The Diocese of Coutances (–Avranches) is a Latin diocese of the Catholic Church in France. Its mother church is the Cathedral of Coutance in the commune of Coutances in France. The diocese is suffragan of the Archbishop of Rouen and comprises the entire department of Manche. It was enlarged in 1802 by the addition of the former Diocese of Avranches and of two archdeaconries from the Diocese of Bayeux. Since 1854 its bishops have held the title of Bishop of Coutances (–Avranches).

The Archdiocese of Rouen is a Latin Church archdiocese of the Catholic Church in France. As one of the fifteen Archbishops of France, the Archbishop of Rouen's ecclesiastical province comprises the greater part of Normandy. The Archbishop of Rouen is currently Dominique Lebrun.