Key, Ohio Unincorporated community in Ohio, U.S. From Wikipedia, the free encyclopedia Key is an unincorporated community in Belmont County, in the U.S. state of Ohio. History A post office called Key was established in 1879, and remained in operation until 1933.[1] Key was formerly called Bethel.[2] In addition to the post office Bethel (Key) had a train station, schoolhouse, and church.[3] References [1]"Belmont County". Jim Forte Postal History. Retrieved January 2, 2016. [2]U.S. Geological Survey Geographic Names Information System: Key, Ohio [3]McKelvey, A. T. (1903). Centennial History of Belmont County, Ohio, and Representative Citizens. Biographical Publishing Company. p. 299. 39°58′30″N 80°52′12″W This Belmont County, Ohio state location article is a stub. You can help Wikipedia by adding missing information.vte Related Articles