Mount vernon is located in Knox county Ohio with a geographic area of 9.7 square miles. The total population in Mount vernon is 16,684 with 47.2% male and 52.8% female. Children under age 5 represent 5.8% of the population, under age 18 equal 21.4% of the population and over age 65 is 18.2% of the population. The median household income is $46,656, per capita income is $23,999. There are a total of 6,523 housing units with 50.5% owner occupied. Education includes 39.8% of residents that are high school graduates and 25.2% with a bachelor's degree or higher. The average temperature in Mount vernon in the summer is 69 degrees, and in the winter 32 degrees.