Madison is located in Lake county South dakota with a geographic area of 4.6 square miles. The total population in Madison is 7,249 with 51.2% male and 48.8% female. Children under age 5 represent 6.4% of the population, under age 18 equal 21.6% of the population and over age 65 is 18.8% of the population. The median household income is $54,861, per capita income is $24,747. There are a total of 2,452 housing units with 59.1% owner occupied. Education includes 24.1% of residents that are high school graduates and 37.8% with a bachelor's degree or higher. The average temperature in Madison in the summer is 69 degrees, and in the winter 15 degrees.
