Green oaks is located in Lake county Illinois with a geographic area of 4.0 square miles. The total population in Green oaks is 3,882 with 53.4% male and 46.6% female. Children under age 5 represent 4.3% of the population, under age 18 equal 22.6% of the population and over age 65 is 23.6% of the population. The median household income is $119,625, per capita income is $71,496. There are a total of 1,457 housing units with 70.4% owner occupied. Education includes 10.6% of residents that are high school graduates and 56.3% with a bachelor's degree or higher. The average temperature in Green oaks in the summer is 74 degrees, and in the winter 27 degrees.