There are 4 real estate agents found in Sullivan City, TX. View our Sullivan City real estate area information to learn about the weather, local school districts, demographic data, and general information about Sullivan City, TX. Get in touch with a Sullivan City real estate agent who can help you find the home of your dreams in Sullivan City. Use our mortgage calculator to see how much it would be to finance a home in Sullivan City. Not ready to buy yet? Find and compare apartments for rent in Sullivan City.