There was a combined almost $11 million of land and rural real estate for sale in Union County, Iowa, recently on Land.com. The total size of all Union County ranches, farms, hunting land and other rural land and acreage for sale was around 1,000 acres. Union County ranks 55th in Iowa for the total number of acres of land currently advertised for sale. Of all farms, ranches, hunting land and other land for sale in Union County, Creston had the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Union County. Union County is the 91st biggest county (425 square miles) in Iowa. It's located in the Western Iowa region of the state.