Washington is located in Washington county Utah with a geographic area of 34.8 square miles. The total population in Washington is 28,192 with 47.8% male and 52.2% female. Children under age 5 represent 6.9% of the population, under age 18 equal 29.2% of the population and over age 65 is 17.4% of the population. The median household income is $75,389, per capita income is $35,137. There are a total of 9,300 housing units with 70.5% owner occupied. Education includes 14.3% of residents that are high school graduates and 35.0% with a bachelor's degree or higher. The average temperature in Washington in the summer is 84 degrees, and in the winter 30 degrees.