Annandale is located in Fairfax county Virginia with a geographic area of 7.8 square miles. The total population in Annandale is 42,240 with 50.1% male and 49.9% female. Children under age 5 represent 6.0% of the population, under age 18 equal 21.0% of the population and over age 65 is 15.7% of the population. The median household income is $101,121, per capita income is $43,607. There are a total of 13,723 housing units with 64.7% owner occupied. Education includes 15.9% of residents that are high school graduates and 52.6% with a bachelor's degree or higher. The average temperature in Annandale in the summer is 71 degrees, and in the winter 35 degrees.
