| Official Name: | Blackfork Junction, Ohio |
| Settlement Type: | Unincorporated community |
| Mapsize: | 250px |
| Pushpin Map: | Ohio |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Jackson |
| Unit Pref: | Imperial |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 689 |
| Coordinates: | 38.8603°N -82.6006°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 45656 |
| Area Code: | 740 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1075394 |
Blackfork Junction (also previously known as Blackfork Station, Samsonville, and Washington Furnace) is an unincorporated community in Jefferson Township, Jackson County, Ohio.[1]
The station on the Ohio Southern Railroad that was located here, and the community itself, have had many names. It was previously called Black Fork Junction, Black Fork Station, and Samsonville. Before that, an 1898 railroad map shows the name "Washington Furnace",[2] and an 1873 map shows it listed simply as "Washington".[3]