| Type: | Ortsteil |
| Municipality: | Rosenthal am Rennsteig |
| Image Coa: | Wappen Blankenstein (Saale).png |
| Coordinates: | 50.4019°N 11.7003°W |
| State: | Thüringen |
| District: | Saale-Orla-Kreis |
| Elevation: | 450 |
| Area: | 1.53 |
| Population: | 705 |
| Stand: | 2017-12-31 |
| Postal Code: | 07366 |
| Area Code: | 036642 |
| Licence: | SOK |
| Website: | www.gemeinde-blankenstein.de |
Blankenstein is a village and a former municipality in the district Saale-Orla-Kreis, in Thuringia, Germany. On 1 January 2019 it became part of the new municipality Rosenthal am Rennsteig. Prior to 2019, Blankenstein had been the seat of the Saale-Rennsteig Verwaltungsgemeinschaft (municipal association), which was disbanded in the reorganisation.