| Official Name: | Fredericktown, Ohio |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Ohio#USA |
| Pushpin Relief: | yes |
| Pushpin Label: | Fredericktown |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Name2: | Columbiana |
| Subdivision Type3: | Township |
| Subdivision Name3: | St. Clair |
| Unit Pref: | Imperial |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 856 |
| Coordinates: | 40.7139°N -80.5478°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 43920 |
| Area Code: | 234/330 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1064681 |
Fredericktown is a historic unincorporated community at the confluence of the north and middle forks of Little Beaver Creek in northeastern St. Clair Township, Columbiana County, Ohio, United States. It lies about six miles north of nearby East Liverpool and about 50 miles west of Pittsburgh. It is known for its historic buildings and its natural environment.
Fredericktown was laid out in 1833 by George Frederick, and named for him.[1] A former variant name was Saint Clair. A post office called Saint Clair operated between 1848 and 1918.[2]
Despite its small size, Fredericktown has a number of historic buildings. These include an unusual octagonal building which was used variously over the years as a general store, a school and the village post office; two churches (one of which was deconsecrated and is now privately owned); several private homes constructed of locally quarried sandstone; several log cabins; a one-room schoolhouse; a number of barns; and the former Stagecoach Inn, which has been a private home for some years.