Zion is located in Lake county Illinois with a geographic area of 9.9 square miles. The total population in Zion is 23,677 with 46.8% male and 53.2% female. Children under age 5 represent 5.8% of the population, under age 18 equal 27.0% of the population and over age 65 is 11.4% of the population. The median household income is $56,819, per capita income is $23,345. There are a total of 8,185 housing units with 56.3% owner occupied. Education includes 28.0% of residents that are high school graduates and 16.1% with a bachelor's degree or higher. The average temperature in Zion in the summer is 74 degrees, and in the winter 27 degrees.
