Countryside is located in Cook county Illinois with a geographic area of 2.9 square miles. The total population in Countryside is 5,929 with 52.1% male and 47.9% female. Children under age 5 represent 4.4% of the population, under age 18 equal 21.0% of the population and over age 65 is 16.1% of the population. The median household income is $67,201, per capita income is $44,265. There are a total of 2,543 housing units with 71.8% owner occupied. Education includes 23.5% of residents that are high school graduates and 34.8% with a bachelor's degree or higher. The average temperature in Countryside in the summer is 74 degrees, and in the winter 27 degrees.