Middle island is located in Suffolk county New york with a geographic area of 8.2 square miles. The total population in Middle island is 11,030 with 46.0% male and 54.0% female. Children under age 5 represent 7.2% of the population, under age 18 equal 19.9% of the population and over age 65 is 22.6% of the population. The median household income is $75,545, per capita income is $36,817. There are a total of 4,406 housing units with 70.5% owner occupied. Education includes 28.1% of residents that are high school graduates and 31.9% with a bachelor's degree or higher. The average temperature in Middle island in the summer is 70 degrees, and in the winter 27 degrees.
