Lake Luzerne is the primary hamlet and a census-designated place within the town of Lake Luzerne, Warren County, New York, United States. As of the 2010 census, the population was 1,227, out of 3,347 residents in the entire town of Lake Luzerne. Before that, the community was part of the Lake Luzerne-Hadley census-designated place. Lake Luzerne CDP is in southern Warren County, in the western part of its town. It is named for Lake Luzerne, a water body on the east side of the hamlet.