| Penacook Lake | |
| Other Name: | Long Pond |
| Basin Countries: | United States |
| Length: | 2.3miles |
| Width: | 0.6miles |
| Area: | 362acres |
| Elevation: | 402feet |
| Cities: | Concord |
| Pushpin Map: | New Hampshire#USA |
| Pushpin Map Alt: | Location of Penacook Lake in New Hampshire, USA. |
Penacook Lake is a 3621NaN1[1] lake located in Merrimack County in central New Hampshire, United States, in the city of Concord. It has also been known as "Long Pond". It is the largest lake in Concord and serves as the city's water supply. Water that is not captured by the city's water treatment plant flows two-thirds of a mile to the Merrimack River.