Contact Information The Episcopal Diocese of Ohio was established in 1817 and comprises 25,737 members, worshipping in 104 parishes and five affiliated institutions in the northern 48 counties of the State of Ohio. Bishop: The Rt. Rev. Mark Hollingsworth, Jr.Website: https://www.dohio.org/Phone: (216) 771-4815Cathedral: Trinity Episcopal Cathedral, Cleveland, OHMissional Relationship: Tanga & Ohio Location 2230 Euclid Avenue Cleveland, OH 44115-2499 United States