Penacook Lake

{{Short description|Lake in New Hampshire, United States}}

{{Infobox lake

| name = Penacook Lake

| other_name = Long Pond

| image = Penacook_Lake_2015.jpg

| caption = Penacook Lake from the south

| 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|362|acre|km2|1}}

| depth =

| max-depth =

| volume =

| residence_time =

| shore =

| elevation = {{Convert|402|ft|m|0}}

| islands =

| cities = Concord

| pushpin_map = New Hampshire#USA

| pushpin_label_position =

| pushpin_map_alt = Location of Penacook Lake in New Hampshire, USA.

| pushpin_map_caption =

| website =

| reference =

}}

Penacook Lake is a {{Convert|362|acre|km2|1|sing=on}}{{Cite web| url=http://granitviewii.unh.edu/| title=GRANITview II| publisher=NH GRANIT project, University of New Hampshire| access-date=September 4, 2014| url-status=dead| archive-url=https://web.archive.org/web/20140904200447/http://granitviewii.unh.edu/| archive-date=September 4, 2014}} lake located in Merrimack County in central New Hampshire, United States, in the city of Concord. It has also been known as "Long Pond".{{gnis|869060}} 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.