The Diocese of Steubenville is the local Catholic Church in 13 counties of Southeastern Ohio, which include: Athens, Belmont, Carroll, Gallia, Guernsey, Harrison, Jefferson, Lawrence, Meigs, Morgan, Monroe, Noble, and Washington. This territory comprises 5,913 square miles. There are 50 parishes and 2 missions. The diocese has 2 high schools and 8 elementary schools. The Catholic population is 28,339. Bishops of the Diocese of Steubenville have included: Bishop John King Mussio, Bishop Albert H. Ottenweller, Bishop Gilbert I. Sheldon, Bishop R. Daniel Conlon, and Bishop Jeffrey M. Monforton. Bishop Paul J. Bradley is a former apostolic administrator. Bishop Edward M. Lohse is the apostolic administrator of Steubenville. The Diocesan Pastoral Center, located at 422 Washington St., Steubenville, can be contacted at (740) 282-3631. The mailing address is P.O. Box 969, Steubenville, OH 43952. The office is open Monday through Friday, 9 a.m.-4 p.m. (Holiday hours vary). During the summer months (Memorial Day through Labor Day), the Pastoral Center is open Monday through Thursday with extended working hours. ​​The​ Immaculate Heart of Mary is the patroness of the Diocese of Steubenville.