| Grungstadvatnet | |
| Caption Map: | Interactive map of the lake |
| Coordinates: | 64.5919°N 12.2102°W |
| Location: | Høylandet Municipality, Trøndelag |
| Inflow: | Søråa river |
| Outflow: | Eida river |
| Basin Countries: | Norway |
| Area: | 6.71km2 |
| Reference: | NVE[1] |
Grungstadvatnet[2] is a lake in Høylandet Municipality in Trøndelag county, Norway. There are salmon, sea trout, european eel, trout, and Arctic char in the lake. The 6.71km2 lake lies just to the north of the large lake Eidsvatnet.[3]