Washington is located in Franklin county Missouri with a geographic area of 9.5 square miles. The total population in Washington is 14,052 with 48.1% male and 51.9% female. Children under age 5 represent 6.6% of the population, under age 18 equal 23.4% of the population and over age 65 is 17.8% of the population. The median household income is $66,779, per capita income is $32,863. There are a total of 5,785 housing units with 72.0% owner occupied. Education includes 26.8% of residents that are high school graduates and 26.8% with a bachelor's degree or higher. The average temperature in Washington in the summer is 77 degrees, and in the winter 32 degrees.