Millstadt is located in St. clair county Illinois with a geographic area of 3.5 square miles. The total population in Millstadt is 3,882 with 49.9% male and 50.1% female. Children under age 5 represent 6.0% of the population, under age 18 equal 23.3% of the population and over age 65 is 14.9% of the population. The median household income is $78,379, per capita income is $40,586. There are a total of 1,541 housing units with 79.1% owner occupied. Education includes 34.5% of residents that are high school graduates and 30.3% with a bachelor's degree or higher. The average temperature in Millstadt in the summer is 74 degrees, and in the winter 27 degrees.
