Mount vernon is located in Jefferson county Illinois with a geographic area of 14.6 square miles. The total population in Mount vernon is 14,769 with 46.9% male and 53.1% female. Children under age 5 represent 7.2% of the population, under age 18 equal 23.3% of the population and over age 65 is 21.0% of the population. The median household income is $42,194, per capita income is $26,558. There are a total of 6,248 housing units with 55.3% owner occupied. Education includes 23.0% of residents that are high school graduates and 22.1% with a bachelor's degree or higher. The average temperature in Mount vernon in the summer is 75 degrees, and in the winter 27 degrees.
