Mount vernon is located in Franklin county Texas with a geographic area of 4.3 square miles. The total population in Mount vernon is 2,780 with 52.3% male and 47.7% female. Children under age 5 represent 6.5% of the population, under age 18 equal 31.1% of the population and over age 65 is 14.4% of the population. The median household income is $56,016, per capita income is $25,880. There are a total of 949 housing units with 67.7% owner occupied. Education includes 28.8% of residents that are high school graduates and 21.0% with a bachelor's degree or higher. The average temperature in Mount vernon in the summer is 83 degrees, and in the winter 49 degrees.