Central islip is located in Suffolk county New york with a geographic area of 7.2 square miles. The total population in Central islip is 33,591 with 51.0% male and 49.0% female. Children under age 5 represent 6.2% of the population, under age 18 equal 23.7% of the population and over age 65 is 9.3% of the population. The median household income is $79,645, per capita income is $29,218. There are a total of 9,412 housing units with 71.6% owner occupied. Education includes 27.8% of residents that are high school graduates and 19.0% with a bachelor's degree or higher. The average temperature in Central islip in the summer is 70 degrees, and in the winter 27 degrees.