Flat Rock, Ohio

Flat Rock is a census-designated place in northeastern Thompson Township, Seneca County, Ohio, United States. It has a post office with the ZIP code 44828. The population was 227 at the 2020 census.

History
Flat Rock was originally called Lewisville, and under the latter name was platted in 1841. A post office called Flat Rock has been in operation since 1846. The present name comes from a flat layer of rock covering an artesian aquifer.

Place of interest

 * Seneca Caverns