Lake Luzerne, formerly the Town of Fairfield and then Luzerne, is a town in southern Warren County, New York, located within the Adirondack Park. It is part of the Glens Falls Metropolitan Statistical Area situated west of the city of Glens Falls with a population of 3,079.

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The area received its first permanent European settlers around 1770. The town of Lake Luzerne was set off from the town of Queensbury in 1792 as the Town of Fairfield. The town is named after Anne-César, Chevalier de la Luzerne, who guaranteed a personal loan to provide food to American revolutionary troops and who served as a French Minister to the new country.

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In 1808, the town changed its name to Luzerne and in 1963 to Lake Luzerne.

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The town is known for its Adirondack Folk School, with classes designed to keep the arts, crafts and culture of the Adirondacks alive, and for the Lake Luzerne Chamber Music Festival where famous artists and the Philadelphia Orchestra perform during the summer months. Every year, children from across the world compete to participate in music camps at the Luzerne Music Center, where free concerts are offered to the public.

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Lake Luzerne is also the home of the Painted Pony Rodeo, the award-winning Nettle Meadow Cheese Shop offering Kunik cheese, and the Double "H" Ranch, founded by Charles R. Wood and the actor, Paul Newman. The ranch provides specialized programs and year-round support for children and their families dealing with life-threatening illnesses.