Westhampton is a hamlet (and census-designated place) in Suffolk County, New York, United States. The population was 2,869 at the 2000 census.
Westhampton is in the Town of Southampton. Westhampton is located at
40°49'22?N 72°39'52?W (40.822894, -72.664306)[3].
According to the United States Census Bureau, the CDP has a total area of 8.9 square miles (23.0 km²), of which, 8.8 square miles (22.8 km²) of it is land and 0.1 square miles (0.2 km²) of it (0.79%) is water.