Baldwin Harbor is a hamlet and former census-designated place (CDP) in the Town of Hempstead, in Nassau County, on Long Island, in New York, United States.

It was created concomitant with the 1990 United States census from the southernmost portions of the neighboring hamlet of Baldwin.

[4][5][6] According to the United States Environmental Protection Agency and the United States Geological Survey, the highest point in Baldwin Harbor is approximately 20 feet (6.1 m), and the lowest points are located at the bays, which are at sea level.

[5][6] As of the census[7] of 2010, there were 8,102 people, 2,687 households, and 2,185 families residing in the CDP.

14.7% of all households were made up of individuals, and 14.6% had someone living alone who was 65 years of age or older.