| Official Name: | Unionville, Ohio |
| Pushpin Map: | Ohio#USA |
| Pushpin Relief: | yes |
| Pushpin Label: | Unionville |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Name2: | Columbiana |
| Subdivision Type3: | Township |
| Subdivision Name3: | Fairfield |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1175 |
| Coordinates: | 40.8553°N -80.7372°W |
| Area Code: | 234 & 330 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1065409 |
Unionville is an unincorporated community in Columbiana County, Ohio, United States. Unionville is located on Ohio State Route 164, 3.2miles southwest of Columbiana.[1]
Unionville was originally called Cool Springs, on account of there being a spring near the original town site.[2]