Somonauk is located in Dekalb county Illinois with a geographic area of 2.5 square miles. The total population in Somonauk is 2,027 with 46.0% male and 54.0% female. Children under age 5 represent 6.7% of the population, under age 18 equal 25.6% of the population and over age 65 is 17.5% of the population. The median household income is $71,375, per capita income is $32,921. There are a total of 721 housing units with 74.8% owner occupied. Education includes 29.4% of residents that are high school graduates and 22.9% with a bachelor's degree or higher. The average temperature in Somonauk in the summer is 74 degrees, and in the winter 27 degrees.
