Richfield is located in Washington county Wisconsin with a geographic area of 35.9 square miles. The total population in Richfield is 11,782 with 50.3% male and 49.7% female. Children under age 5 represent 2.9% of the population, under age 18 equal 20.9% of the population and over age 65 is 19.0% of the population. The median household income is $113,190, per capita income is $57,183. There are a total of 4,596 housing units with 97.9% owner occupied. Education includes 20.1% of residents that are high school graduates and 47.7% with a bachelor's degree or higher. The average temperature in Richfield in the summer is 66 degrees, and in the winter 17 degrees.