There are 5 real estate agents found in St Joseph, IL. View our St Joseph real estate area information to learn about the weather, local school districts, demographic data, and general information about St Joseph, IL. Get in touch with a St Joseph real estate agent who can help you find the home of your dreams in St Joseph. Use our mortgage calculator to see how much it would be to finance a home in St Joseph. Not ready to buy yet? Find and compare apartments for rent in St Joseph.