Fort washington is located in Prince george's county Maryland with a geographic area of 13.8 square miles. The total population in Fort washington is 24,468 with 49.8% male and 50.2% female. Children under age 5 represent 5.4% of the population, under age 18 equal 20.0% of the population and over age 65 is 20.4% of the population. The median household income is $122,206, per capita income is $47,838. There are a total of 8,105 housing units with 90.2% owner occupied. Education includes 14.6% of residents that are high school graduates and 49.0% with a bachelor's degree or higher. The average temperature in Fort washington in the summer is 74 degrees, and in the winter 37 degrees.