Baldwin Harbor is a hamlet (and census-designated place) in Nassau County, New York, United States. The population was 8,147 at the 2000 census.

Baldwin Harbor is in the Town of Hempstead.

Baldwin Harbor is located at 40°38′2″N, 73°36′14″W (40.633923, -73.603779)US Gazetteer files: 2000 and 1990. United States Census Bureau (2005-05-03). Retrieved on 2008-01-31..

According to the United States Census Bureau, the CDP has a total area of 1.7 square miles (4.4 km²), of which, 1.2 square miles (3.2 km²) of it is land and 0.5 square miles (1.2 km²) of it (28.24%) is water.

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