St. charles is located in Madison county Iowa with a geographic area of 0.6 square miles. The total population in St. charles is 787 with 45.9% male and 54.1% female. Children under age 5 represent 4.2% of the population, under age 18 equal 24.0% of the population and over age 65 is 15.5% of the population. The median household income is $77,083, per capita income is $31,754. There are a total of 327 housing units with 67.9% owner occupied. Education includes 38.8% of residents that are high school graduates and 13.5% with a bachelor's degree or higher. The average temperature in St. charles in the summer is 72 degrees, and in the winter 23 degrees.
