| Type: | Ortsteil |
| Municipality: | Harztor |
| Coordinates: | 51.5333°N 62°W |
| State: | Thüringen |
| District: | Nordhausen |
| Elevation: | 321 |
| Area: | 19.14 |
| Population: | 344 |
| Stand: | 2016-12-31 |
| Postal Code: | 99762 |
| Area Code: | 03631 |
Herrmannsacker is a village and a former municipality in the district of Nordhausen, in Thuringia, Germany. Since July 2018, it is part of the municipality Harztor.