Lorton is located in Fairfax county Virginia with a geographic area of 5.3 square miles. The total population in Lorton is 20,924 with 45.7% male and 54.3% female. Children under age 5 represent 5.7% of the population, under age 18 equal 27.6% of the population and over age 65 is 9.2% of the population. The median household income is $107,803, per capita income is $43,311. There are a total of 6,563 housing units with 57.2% owner occupied. Education includes 13.3% of residents that are high school graduates and 56.4% with a bachelor's degree or higher. The average temperature in Lorton in the summer is 71 degrees, and in the winter 35 degrees.