Beaver Dam Lake is a census-designated place (CDP) in the towns of New Windsor, Blooming Grove, and Cornwall in Orange County, New York, United States. As of the 2020 census, it had a population of 2,609.
The CDP is in eastern Orange County, bordered to the west by the village of Washingtonville and to the south by Salisbury Mills. The community surrounds Beaver Dam Lake, which drains south to Moodna Creek at Salisbury Mills. Moodna Creek flows into the Hudson River between New Windsor and Cornwall-on-Hudson.
New York State Route 94 forms the southern edge of the CDP. It leads northeast to New Windsor and southwest to Chester. Newburgh is to the northeast, and Middletown is to the west.
As of the census of 2023, there were 3,361 people residing in the area.
According to the United States Census Bureau, the CDP has a total area of , of which is land and (10.95%) is water.
Most of it is in Washingtonville Central School District while a portion is in Cornwall Central School District.