Londonderry is an unincorporated community in eastern Liberty Township, Ross County, Ohio, United States.[1] It has a post office with the ZIP code 45647.[2] It lies along U.S. Route 50 at its intersection with State Route 327.
Londonderry was laid out in 1831.[3] A post office was established under the name Gillespieville in 1833, and the name was changed to Londonderry in 1929.[4] The present name is derived from Londonderry, Northern Ireland, the native home of a first settler.[5]
39°16′0″N 82°47′24″W / 39.26667°N 82.79000°W / 39.26667; -82.79000