Bethany is an unincorporated community of central Liberty Township, in southwestern Ohio's Butler County about three miles south of Monroe.

It was laid out by Peter and David Williamson in 1798 on what would become the Cincinnati and Dayton Turnpike (which was later known as the Dixie Highway, United States Highway 25 , and Cincinnati-Dayton Road. It gave its name to the Voice of America's Bethany Relay Station and to the telephone exchange which covers most of Liberty and West Chester Townships. It is served by the Middletown post office and the Lakota Local School District.