| Blumenthal | |
| Image Coa: | DEU Blumenthal (Holstein) COA.svg |
| Coordinates: | 54.2167°N 10°W |
| Image Plan: | Blumenthal in RD.png |
| State: | Schleswig-Holstein |
| District: | Rendsburg-Eckernförde |
| Amt: | Eidertal |
| Elevation: | 31 |
| Area: | 7.8 |
| Postal Code: | 24241 |
| Area Code: | 04347 |
| Licence: | RD |
| Gemeindeschlüssel: | 01 0 58 018 |
| Mayor: | Johann Brunkhorst |
Blumenthal is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany.
Blumenthal is located about 8 miles southwest of Kiel at the Bundesautobahn 215.
The town was originally agrarian-oriented, but now because of its proximity to the state capital Kiel, the residential use of land predominates.