Fairview heights is located in St. clair county Illinois with a geographic area of 11.4 square miles. The total population in Fairview heights is 16,143 with 51.5% male and 48.5% female. Children under age 5 represent 5.2% of the population, under age 18 equal 23.6% of the population and over age 65 is 14.8% of the population. The median household income is $68,505, per capita income is $34,003. There are a total of 6,741 housing units with 63.9% owner occupied. Education includes 15.6% of residents that are high school graduates and 37.8% with a bachelor's degree or higher. The average temperature in Fairview heights in the summer is 76 degrees, and in the winter 27 degrees.
