| Penacook Lake | |
|---|---|
| Location | Concord, Merrimack County, New Hampshire |
| Primary outflows | Tributary of Merrimack River |
| Basin countries | United States |
| Max. length | 2.3 miles (3.7 km) |
| Max. width | 0.6 miles (1.0 km) |
| Surface area | 360 acres (1.5 km2) |
| Surface elevation | 402 feet (123 m) |
| Settlements | Concord |
Penacook Lake is a 360-acre (1.5 km2) lake located in Merrimack County in central New Hampshire, United States, in the city of Concord. It serves as the water supply for Concord. Water that is not captured by the city's water treatment plant flows two-thirds of a mile to the Merrimack River.