Will county is located in Illinois with a geographic area of 849.4 square miles. The total population in Will county is 689,704 with 49.6% male and 50.4% female. Children under age 5 represent 5.8% of the population, under age 18 equal 24.9% of the population and over age 65 is 13.1% of the population. The median household income is $90,800, per capita income is $37,967. There are a total of 232,395 housing units with 81.4% owner occupied. Education includes 23.0% of residents that are high school graduates and 37.1% with a bachelor's degree or higher. The average temperature in Will county in the summer is 72 degrees, and in the winter 26 degrees.