Contoocook Lake (/kənˈtʊkək/ ^ⓘ) is a 344-acre (1.4 km²)^[1] water body located in Cheshire County in southwestern New Hampshire, United States, in the towns of Jaffrey and Rindge.^[2] The lake, along with Pool Pond, forms the headwaters of the Contoocook River, which flows north to the Merrimack River in Penacook, New Hampshire.

Contoocook Lake
Contoocook Lake Show map of New Hampshire Contoocook Lake Show map of the United States
Location	Cheshire County, New Hampshire
Coordinates	42°47′12″N 72°0′45″W / 42.78667°N 72.01250°W / 42.78667; -72.01250
Primary outflows	Contoocook River
Basin countries	United States
Max. length	2.8 mi (5 km)
Max. width	0.5 mi (1 km)
Surface area	344 acres (1.4 km2)
Average depth	7 ft (2.1 m)
Max. depth	23 ft (7.0 m)
Surface elevation	1,007 feet (307 m)
Settlements	Rindge; Jaffrey

The lake is classified as a warmwater fishery, with observed species including largemouth bass, smallmouth bass, white perch, yellow perch, black crappie, bluegill, pumpkinseed, chain pickerel, and brown bullhead.^[1]