Westhampton is a hamlet and census-designated place (CDP) in Suffolk County, New York, United States.

The plant hardiness is more similar to a humid continental climate (Dfb) although winter days are mild enough that Westhampton is unlikely to maintain long-term snow cover in a normal winter.

Due to the lack of an urban environment and being away from the immediate coastline, the area has much colder nights than New York City.

23.0% of all households were made up of individuals, and 7.6% had someone living alone who was 65 years of age or older.

Maria Bartiromo, of Fox News owns a beach house in Westhampton.