The Diocese of Youngstown is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in northeastern Ohio in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Cincinnati. The Diocese of Youngstown consists of six counties: Mahoning, Trumbull, Columbiana, Stark, Portage, and Ashtabula. The mother church of the diocese ... Wikipedia