Lake Nicolet
Lac Nicolet (French)
Lake Nicolet seen from Gosford street, near Saints-Martyrs-Canadiens
Lake Nicolet
Location	Canada, Quebec, Centre-du-Québec, Arthabaska Regional County Municipality
Coordinates	45°49′48″N 71°33′37″W / 45.83°N 71.56028°W / 45.83; -71.56028
Primary outflows	Nicolet River
Catchment area	9.4 kilometres (5.84 mi)
Max. length	5.1 kilometres (3.2 mi)
Max. width	1.7 kilometres (1.1 mi)
Surface area	4.1 kilometres (2.55 mi)
Average depth	17 metres (56 ft)
Max. depth	41 metres (135 ft)
Surface elevation	350 metres (1,150 ft)
Frozen	Mid December to end of April
Islands	Boulanger, Linke, L'Heureux, Baril, Michel-Rheault, Rolland.

Note: not to be confused with another "Lake Nicolet", in Michigan (USA), on the St. Marys River (Michigan–Ontario) which links Lake Superior with Lake Huron.

Lake Nicolet (in French: lac Nicolet) is located 50 km south of Victoriaville, in the municipality of Saints-Martyrs-Canadiens, in Arthabaska Regional County Municipality (MRC), in administrative region of Centre-du-Québec, Canada.

Lake Nicolet is the source of the Nicolet River which flows 137 kilometres (85 mi) to the southeast shore of lake Saint-Pierre, in Nicolet. The latest is crossed through the North-East by the St. Lawrence River.

This lake is surrounded by Chemin du Lac-Nicolet (north-west side) and Chemin Gosford-Sud (south-east side).

The lake takes its name from Jean Nicolet (1598 - 1642), a French explorer at the time of New France who is known to have been the first European to explore Lake Michigan.

Lake Nicolet is 5.1 kilometres (3.2 mi) long and 1.7 kilometres (1.1 mi) wide, resembling a misshapen crescent surrounded by mountains. It has seven islands: Boulanger, Baril, Linke, L'Heureux, à Michel-Rheault, Rolland and a little unnamed island. The main mountain peaks around the lake are: Brûlé Mountain (500 metres (1,600 ft)) at 1.5 kilometres (0.93 mi) on the south side of the bay leading to the mouth of the lake; a 419 metres (1,375 ft) vertex on the west side and another on the southeast side (492 metres (1,614 ft)). This lake has a hundred chalets all around.^[1]

The toponym "Lac Nicolet" was made official on December 5, 1968, at the Commission de toponymie du Québec. ^[2]

• Nicolet River
• Centre-du-Québec, administrative region