The Diocese of Paterson is a diocese of the Latin Rite of the Roman Catholic Church in the United States, which includes three counties in northern New Jersey: Passaic, Morris, and Sussex. The city of Paterson, third-largest in the state of New Jersey, was chosen as the episcopal see, even though the vast majority of diocesan territory lies west of the city. The diocese is a ceremonial suffragan of the Archdiocese of Newark, and is part of Region III of the United States Conference of Catholic Bishops.