Geneva is located in Kane county Illinois with a geographic area of 9.9 square miles. The total population in Geneva is 21,843 with 46.4% male and 53.6% female. Children under age 5 represent 4.8% of the population, under age 18 equal 24.7% of the population and over age 65 is 15.7% of the population. The median household income is $116,083, per capita income is $52,697. There are a total of 7,925 housing units with 83.7% owner occupied. Education includes 13.3% of residents that are high school graduates and 62.8% with a bachelor's degree or higher. The average temperature in Geneva in the summer is 70 degrees, and in the winter 27 degrees.