There are 22 real estate agents found in Carthagena, OH. View our Carthagena real estate area information to learn about the weather, local school districts, demographic data, and general information about Carthagena, OH. Get in touch with a Carthagena real estate agent who can help you find the home of your dreams in Carthagena. Use our mortgage calculator to see how much it would be to finance a home in Carthagena. Not ready to buy yet? Find and compare apartments for rent in Carthagena.