There are 9 real estate agents found in Tonica, IL. View our Tonica real estate area information to learn about the weather, local school districts, demographic data, and general information about Tonica, IL. Get in touch with a Tonica real estate agent who can help you find the home of your dreams in Tonica. Use our mortgage calculator to see how much it would be to finance a home in Tonica. Not ready to buy yet? Find and compare apartments for rent in Tonica.