Sayville is located in Suffolk county New york with a geographic area of 5.3 square miles. The total population in Sayville is 15,910 with 47.4% male and 52.6% female. Children under age 5 represent 5.8% of the population, under age 18 equal 22.5% of the population and over age 65 is 21.0% of the population. The median household income is $125,075, per capita income is $58,885. There are a total of 5,554 housing units with 75.6% owner occupied. Education includes 16.6% of residents that are high school graduates and 55.1% with a bachelor's degree or higher. The average temperature in Sayville in the summer is 70 degrees, and in the winter 27 degrees.
