The value of all farms, ranches, hunting land and other land for sale in Union County, Iowa, recently was almost $19 million, representing a combined 2,158 acres of land for sale in Union County. Union County ranks 73rd out of 99 counties in the state for the combined amount of land currently advertised for sale. Among cities in Union County with farms, ranches, and rural real estate for sale, 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 Iowa's 91st biggest county (425 square miles). It's located in the Western Iowa region of Iowa.