Union County is in Western Iowa. Of the 99 counties in the Hawkeye State, Union County ranks 91st in terms of size (272,510 acres). There is almost 1,000 acres of residential land and property for sale in Iowa's Union County based on recent Land Network data, making it the most common type of land for sale in Union County. The combined market value of land for sale here is around $7 million. The average price of residential land for sale in Union County was $238,696. Browse all residential land and rural property for sale in Iowa 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.