Vandalia is located in Audrain county Missouri with a geographic area of 2.2 square miles. The total population in Vandalia is 3,903 with 29.1% male and 70.9% female. Children under age 5 represent 4.0% of the population, under age 18 equal 13.4% of the population and over age 65 is 13.6% of the population. The median household income is $37,634, per capita income is $15,798. There are a total of 1,069 housing units with 66.6% owner occupied. Education includes 43.5% of residents that are high school graduates and 13.6% with a bachelor's degree or higher. The average temperature in Vandalia in the summer is 75 degrees, and in the winter 32 degrees.
