Key is an unincorporated community in Belmont County, in the U.S. state of Ohio.
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]
39°58′30″N 80°52′12″W / 39.97500°N 80.87000°W