Maryville is located in Madison county Illinois with a geographic area of 5.7 square miles. The total population in Maryville is 7,962 with 49.6% male and 50.4% female. Children under age 5 represent 4.5% of the population, under age 18 equal 15.6% of the population and over age 65 is 20.6% of the population. The median household income is $84,293, per capita income is $45,441. There are a total of 3,371 housing units with 81.2% owner occupied. Education includes 14.4% of residents that are high school graduates and 42.8% with a bachelor's degree or higher. The average temperature in Maryville in the summer is 74 degrees, and in the winter 27 degrees.
