| Bjørnstadvatnet | |
| Caption Map: | Interactive map of the lake |
| Coordinates: | 70.3673°N 23.6987°W |
| Location: | Finnmark |
| Basin Countries: | Norway |
| Area: | 4.63km2 |
| Reference: | NVE |
Bjørnstadvatnet is a lake in Hammerfest Municipality in Finnmark county, Norway. The 4.63km2 lake lies about east of the village of Saraby. The lake has a dam on the northern end of the lake, and it is regulated for hydroelectric power.[1]