| Rundvatnet | |
| Pushpin Map: | Nordland#Norway |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location of the lake |
| Coordinates: | 67.3239°N 15.98°W |
| Location: | Sørfold, Nordland |
| Basin Countries: | Norway |
| Area: | 2.27km2 |
| Reference: | NVE |
Rundvatnet is a lake that lies in the municipality of Sørfold in Nordland county, Norway. It is located in the southeastern part of the municipality of Sørfold, about east of the village of Straumen. The lake Sisovatnet lies immediately west of Rundvatnet; they are connected by the narrow Rundvasstraumen strait.[1]