Penacook Lake

Infobox lake
lake_name = Penacook Lake
image_lake = Penacook Lake, West Concord, NH.jpg
caption_lake =
image_bathymetry =
caption_bathymetry =
location = Merrimack County, New Hampshire
coords = coord|43|13|52|N|71|35|29|W|type:waterbody_region:US|display=inline,title
type =
inflow =
outflow = Tributary of Merrimack River
catchment =
basin_countries = United States
length = convert|2.3|mi|km|1
width = convert|0.6|mi|km|1
area = convert|360|acre|km2|1
depth =
max-depth =
volume =
residence_time =
shore =
elevation = convert|402|ft|m|0
islands =
cities = Concord

Penacook Lake is a convert|360|acre|km2|1|sing=on 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.