Washington is located in Daviess county Indiana with a geographic area of 6.6 square miles. The total population in Washington is 12,514 with 48.5% male and 51.5% female. Children under age 5 represent 8.7% of the population, under age 18 equal 26.4% of the population and over age 65 is 17.8% of the population. The median household income is $40,080, per capita income is $19,738. There are a total of 4,810 housing units with 53.4% owner occupied. Education includes 40.6% of residents that are high school graduates and 12.5% with a bachelor's degree or higher. The average temperature in Washington in the summer is 76 degrees, and in the winter 29 degrees.