| Swains Lake | |
|---|---|
| Location | Strafford County, New Hampshire |
| Primary outflows | Bellamy River |
| Basin countries | United States |
| Max. length | 2.2 mi (3.5 km) |
| Max. width | 0.7 mi (1.1 km) |
| Surface area | 349 acres (1.41 km2) |
| Surface elevation | 279 ft (85 m) |
| Islands | Calef Island |
| Settlements | Barrington |
Swains Lake[1] (also known as Union Lake[2]) is a 349-acre (1.41 km2)[3] water body located in Strafford County in eastern New Hampshire, in the town of Barrington. Water from Swains Lake flows via the Bellamy River to the Piscataqua River estuary.