is a hamlet and Census Designated Place in Nassau County, New York on the North Shore of Long Island. As of the United States 2000 Census, the community population was 15,215.
Port Washington is an unincorporated area within and directly governed by the Town of North Hempstead.
In broader sense, however, Port Washington includes the communities of Baxter Estates, Manorhaven, Port Washington North, Sands Point, Beacon Hill, Beacon Hill Colony , Manhasset Isle, New Salem, and northern Flower Hill as these areas share the same ZIP code, school and library districts.
According to the United States Census Bureau, the CDP has a total area of 5.6 square miles (14.6 km²), of which, 4.2 square miles (10.9 km²) of it is land and 1.4 square miles (3.7 km²) of it (25.22%) is water.