| Shag Lake | |
| Pushpin Map: | Northland |
| Pushpin Map Alt: | Location of Shag Lake |
| Coords: | -35.7911°N 173.6076°W |
Shag Lake is a dune lake in the Northland Region of New Zealand. It is near the three Kai Iwi Lakes and close to the coast of the Tasman Sea, about 20 km south of Waipoua Forest.