Buying a home in Union, Missouri does not have to be difficult - Homes.com makes home buying a breeze. With 352 homes for sale in Union, Missouri, you can search by price, bedrooms, neighborhood, and even by property type. Search Union homes for sale, foreclosures, MLS listings, and more. Make an informed decision with Union school data, neighborhood information, find Union real estate agents, and research home values in Union, MO. Homes.com has everything you need but the house keys.