| Bad Grund | |
| Type: | Samtgemeinde |
| Coordinates: | 51.7856°N 10.2111°W |
| State: | Lower Saxony |
| District: | Osterode |
| Elevation: | 225 |
| Area: | 41.18 |
| Population: | 8824 |
| Stand: | 2011-12-31 |
| Pop Ref: | [1] |
| Postal Code: | 37534, 37539 |
| Area Code: | 05327, 05522 |
| Licence: | OHA |
| Divisions: | 5 municipalities |
| Website: | www.samtgemeinde badgrund.de |
| Dissolved: | 1 March 2013 |
| Noautocat: | yes |
Bad Grund (Harz) is a former Samtgemeinde ("collective municipality") in the district of Osterode, in Lower Saxony, Germany. Its seat was in the village Windhausen. It was disbanded on 1 March 2013.
The Samtgemeinde Bad Grund (Harz) consisted of the following municipalities: