There are 6 real estate agents found in St John, KS. View our St John real estate area information to learn about the weather, local school districts, demographic data, and general information about St John, KS. Get in touch with a St John real estate agent who can help you find the home of your dreams in St John. Use our mortgage calculator to see how much it would be to finance a home in St John. Not ready to buy yet? Find and compare apartments for rent in St John.