Middleton is located in Dane county Wisconsin with a geographic area of 8.9 square miles. The total population in Middleton is 19,764 with 48.3% male and 51.7% female. Children under age 5 represent 5.7% of the population, under age 18 equal 21.7% of the population and over age 65 is 15.0% of the population. The median household income is $73,336, per capita income is $48,588. There are a total of 8,889 housing units with 49.9% owner occupied. Education includes 10.5% of residents that are high school graduates and 61.3% with a bachelor's degree or higher. The average temperature in Middleton in the summer is 68 degrees, and in the winter 17 degrees.