There are 104 real estate agents found in Saint Charles, MO. View our Saint Charles real estate area information to learn about the weather, local school districts, demographic data, and general information about Saint Charles, MO. Get in touch with a Saint Charles real estate agent who can help you find the home of your dreams in Saint Charles. Use our mortgage calculator to see how much it would be to finance a home in Saint Charles. Not ready to buy yet? Find and compare apartments for rent in Saint Charles.