Wainscott is a hamlet in the Town of East Hampton in Suffolk County, New York, United States, on the South Fork of Long Island. As of the 2010 United States Census, the CDP population was 650. For statistical purposes, the United States Census Bureau defined a census-designated place (CDP) for the 2000 census that roughly corresponds to the same area.

The Town of East Hampton is located in southeastern Suffolk County, New York, at the eastern end of the South Shore of Long Island. It is the easternmost town in the state of New York. At the time of the 2020 United States census, it had a total population of 28,385.