Beaverdam Lake-Salisbury Mills was a census-designated place (CDP) in Orange County, New York, United States. It encompassed a region in the corner of the towns of Blooming Grove, Cornwall, and New Windsor. As of the 2000 census, its population was 2,779. For the 2010 census, the area was counted as two separate CDPs: Beaver Dam Lake (pop. 2,242) in the towns of Blooming Grove and New Windsor and Salisbury Mills (pop. 536) in the towns of Blooming Grove and Cornwall.