West Sayville is a hamlet and census-designated place (CDP) in Suffolk County, New York, United States. It had a population of 5,011 at the 2010 census.
West Sayville is located on the South Shore of Long Island in the Town of Islip. Its coordinates are 40°43’54”N 73°6’18”W (40.731594, -73.099701). West Sayville's coastline borders the Great South Bay.
According to the U.S. Census Bureau, West Sayville has a total area of 2.10 square miles (5.45 km2), of which 2.10 square miles (5.44 km2) is land and 0.0077 square miles (0.02 km2), or 0.31%, is water.
West Sayville's ZIP code is 11796. The West Sayville Post Office is located at 12 Washington Avenue.
The United States Census Bureau reported that during the 2010 census, the population of West Sayville was 5,011, with a population density of 2,386.2 per square mile. Of the total population, 2,407 (48.0%) were males and 2,604 (52.0%) were females.
There were 1,771 households, 1,314 families and 606 families with children under the age of eighteen. In addition, there were a total of 2,124 housing units, of which 1,771 (83.4%) were occupied and 353 (16.6%) were unoccupied. Of the occupied housing units, 1,485 (83.9%) were owner-occupied units, and the remaining 286 (16.1%) were renter-occupied units.
The median household income was reported as $95,938 by the U.S. Census Bureau with 93.3% holding a high school education.