There are 69 real estate agents found in Mattawa, WA. View our Mattawa real estate area information to learn about the weather, local school districts, demographic data, and general information about Mattawa, WA. Get in touch with a Mattawa real estate agent who can help you find the home of your dreams in Mattawa. Use our mortgage calculator to see how much it would be to finance a home in Mattawa. Not ready to buy yet? Find and compare apartments for rent in Mattawa.