Tupper Lake
Boathouses on the lake
Tupper Lake Show map of New York Tupper Lake Show map of the United States
Location	Adirondack Park, Altamont / Piercefield, New York, US
Coordinates	44°10′N 74°32′W / 44.17°N 74.54°W / 44.17; -74.54
Primary inflows	Raquette River, Bog River
Primary outflows	Raquette River
Basin countries	United States
Max. length	66 km (41 mi)
Surface area	44 km2 (17 sq mi)
Max. depth	45 m (148 ft)
Water volume	456 km3 (370,000,000 acre⋅ft)
Shore length1	33 km (21 mi)
Islands	County Line Island, Bluff Island, Birch Island-for sale
Settlements	Village of Tupper Lake
1 Shore length is not a well-defined measure.

Tupper Lake is located in the state of New York in the United States.^[1] The lake is in the Adirondack Park and crosses the county lines of St. Lawrence County and Franklin County.

Tupper Lake was discovered by Native Americans indigenous to the area around the 16th century. The first European to see it was Ansel Tupper, a land surveyor. It is aligned in a northeast to southwest direction along its length. The lake is fed and drained by the Raquette River.

The lake is located in the towns of Altamont (Franklin County) and Piercefield (St. Lawrence County). The Village of Tupper Lake is at the northeast end of the lake in the Town of Tupper Lake. The village is adjacent to Raquette Pond, an arm of the lake at its northwest end. Another arm of the lake, Lake Simond (also known as Simond Pond and Simon Pond), is south of the village. Some of the islands in the lake include County Line Island and Bluff Island.