Evanston is located in Cook county Illinois with a geographic area of 7.8 square miles. The total population in Evanston is 73,979 with 47.8% male and 52.2% female. Children under age 5 represent 5.7% of the population, under age 18 equal 19.9% of the population and over age 65 is 16.0% of the population. The median household income is $82,335, per capita income is $53,685. There are a total of 27,918 housing units with 56.7% owner occupied. Education includes 9.9% of residents that are high school graduates and 71.2% with a bachelor's degree or higher. The average temperature in Evanston in the summer is 70 degrees, and in the winter 27 degrees.