Islip terrace is located in Suffolk county New york with a geographic area of 1.3 square miles. The total population in Islip terrace is 5,244 with 51.1% male and 48.9% female. Children under age 5 represent 5.1% of the population, under age 18 equal 21.2% of the population and over age 65 is 12.7% of the population. The median household income is $133,606, per capita income is $49,146. There are a total of 1,717 housing units with 88.6% owner occupied. Education includes 35.1% of residents that are high school graduates and 28.0% with a bachelor's degree or higher. The average temperature in Islip terrace in the summer is 70 degrees, and in the winter 27 degrees.