Nubanusit Lake is a 718-acre (2.91 km²) lake located on the border between Cheshire and Hillsborough counties in southwestern New Hampshire, United States, in the towns of Nelson and Hancock. The outlet of the lake is Nubanusit Brook, a tributary of the Contoocook River in the Merrimack River drainage basin.

Nubanusit Lake
Nubanusit Lake Show map of New Hampshire Nubanusit Lake Show map of the United States
Location	Cheshire County and Hillsborough County, New Hampshire
Coordinates	42°59′1″N 72°3′43″W / 42.98361°N 72.06194°W / 42.98361; -72.06194
Primary outflows	Nubanusit Brook
Basin countries	United States
Max. length	3.7 mi (6.0 km)
Max. width	0.6 mi (0.97 km)
Surface area	718 acres (2.91 km2)
Average depth	40 ft (12 m)
Max. depth	97 ft (30 m)
Surface elevation	1,375 feet (419 m)
Islands	2
Settlements	Nelson; Hancock

The lake is classified as a coldwater fishery, with observed species including rainbow trout, lake trout, smallmouth bass, chain pickerel, yellow perch, and horned pout.^[1]