Union County is in Hills Mississippi. Of the 82 counties in the state, Union County ranks 72nd in terms of size (416 square miles). There is nearly 3,000 acres of residential land and property for sale in Union County, Mississippi, based on recent Land Network data, making it the most common type of land for sale in Union County. The combined market value of farmsand rural real estate for sale here is nearly $30 million. The average price of residential land for sale in Union County was $307,186. Browse all residential land and rural property for sale in Mississippi to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.