Fort madison is located in Lee county Iowa with a geographic area of 9.6 square miles. The total population in Fort madison is 10,407 with 52.7% male and 47.3% female. Children under age 5 represent 5.4% of the population, under age 18 equal 21.3% of the population and over age 65 is 18.7% of the population. The median household income is $44,334, per capita income is $25,042. There are a total of 4,330 housing units with 69.1% owner occupied. Education includes 33.8% of residents that are high school graduates and 16.1% with a bachelor's degree or higher. The average temperature in Fort madison in the summer is 76 degrees, and in the winter 23 degrees.