Lake Luzerne-Hadley was a census-designated place (CDP) in Saratoga and Warren counties in the U.S. state of New York. The portion in Warren County is part of the Glens Falls Metropolitan Statistical Area. The CDP consisted of the centers of population in the towns of Hadley (Saratoga County) and Lake Luzerne (Warren County).
The population was 2,240 at the 2000 census. For the 2010 census, the area was redelineated as two separate CDPs, Lake Luzerne (pop. 1,227) and Hadley (pop. 1,009). The CDPs are located at the confluence of the Sacandaga and Hudson rivers.