About This Place
West Sayville is a hamlet (and census-designated place) in Suffolk County, New York, United States. The population was 5,003 at the 2000 census.
West Sayville is located in the southwest part of the Town of Islip.
West Sayville is located at 40°43′54″N 73°6′18″W / 40.73167°N 73.105°W / 40.73167; -73.105 (40.731594, -73.105116).