Andover is located in Butler county Kansas with a geographic area of 10.4 square miles. The total population in Andover is 13,609 with 49.3% male and 50.7% female. Children under age 5 represent 7.5% of the population, under age 18 equal 34.7% of the population and over age 65 is 9.6% of the population. The median household income is $98,320, per capita income is $35,673. There are a total of 4,395 housing units with 77.2% owner occupied. Education includes 10.3% of residents that are high school graduates and 55.8% with a bachelor's degree or higher. The average temperature in Andover in the summer is 78 degrees, and in the winter 32 degrees.