| First Connecticut Lake | |
|---|---|
| Location | Coos County, New Hampshire |
| Primary inflows | Connecticut River |
| Primary outflows | Connecticut River |
| Basin countries | United States |
| Max. length | 5.3 miles (8.5 km) |
| Max. width | 2.7 miles (4.3 km) |
| Surface area | 3,071 acres (1,243 ha) |
| Surface elevation | 1,638 ft (499 m) |
| Settlements | Pittsburg |
First Connecticut Lake is located in Coos County in northern New Hampshire, in the town of Pittsburg. At 3,071 acres (1,243 ha)[1], it is the eighth-largest lake located entirely in New Hampshire. It is the lowest (and largest) of a chain of lakes near the headwaters of the Connecticut River.