| Official Name: | Campbellstown, Ohio |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Ohio#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Name2: | Preble |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1188 |
| Coordinates: | 39.7878°N -84.7603°W |
| Area Code: | 937, 326 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1056762 |
Campbellstown (also Florence, Florence Station) is an unincorporated community in Jackson Township, Preble County, Ohio United States. The community is served by National Trail High School and the National Trail Local School District.
Campbellstown was originally called Florence Station, and under the latter name was laid out in 1852 when the railroad was extended to that point.[1] The present name honors a pioneer settler with the surname Campbell.[2] A post office called Campbellstown was established in 1854, and remained in operation until 1954.[3]