Madison is located in Madison county Illinois with a geographic area of 14.0 square miles. The total population in Madison is 2,941 with 42.8% male and 57.2% female. Children under age 5 represent 4.0% of the population, under age 18 equal 15.2% of the population and over age 65 is 15.8% of the population. The median household income is $30,592, per capita income is $19,262. There are a total of 1,593 housing units with 39.5% owner occupied. Education includes 33.7% of residents that are high school graduates and 7.3% with a bachelor's degree or higher. The average temperature in Madison in the summer is 76 degrees, and in the winter 27 degrees.