Fairfax is located in Fairfax county Virginia with a geographic area of 6.2 square miles. The total population in Fairfax is 23,312 with 48.8% male and 51.2% female. Children under age 5 represent 7.1% of the population, under age 18 equal 21.7% of the population and over age 65 is 15.3% of the population. The median household income is $109,708, per capita income is $53,488. There are a total of 8,751 housing units with 69.9% owner occupied. Education includes 10.7% of residents that are high school graduates and 60.8% with a bachelor's degree or higher. The average temperature in Fairfax in the summer is 74 degrees, and in the winter 35 degrees.
