| Official Name: | Roachester, Ohio |
| Pushpin Map: | Ohio#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Name2: | Warren |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 3.39 |
| Area Land Km2: | 3.39 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 1.31 |
| Area Land Sq Mi: | 1.31 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 579 |
| Population Density Km2: | 170.81 |
| Population Density Sq Mi: | 442.32 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 827 |
| Coordinates: | 39.3539°N -84.0989°W |
| Area Code: | 513 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 2812844 |
Roachester is an unincorporated community in Warren County, Ohio, United States. Roachester is located at the junction of Ohio State Route 3 and Ohio State Route 123, 1.6miles east of Morrow.
An early variant name was "Salem".[2] Roachester was platted in 1816, and named for James Roach, proprietor.[3] A post office called Rochester was established in 1825, and remained in operation until 1853.[4]