Manassas is located in Prince william county Virginia with a geographic area of 9.8 square miles. The total population in Manassas is 41,038 with 50.4% male and 49.6% female. Children under age 5 represent 7.9% of the population, under age 18 equal 26.7% of the population and over age 65 is 10.4% of the population. The median household income is $86,227, per capita income is $34,198. There are a total of 13,066 housing units with 69.3% owner occupied. Education includes 22.6% of residents that are high school graduates and 34.8% with a bachelor's degree or higher. The average temperature in Manassas in the summer is 75 degrees, and in the winter 35 degrees.