A total of 3,000 acres were listed for sale in Union County, Iowa, recently; the combined value of all Union County farms and ranches for sale was $19 million. Union County ranks 75th out of 99 counties in Iowa for the total acreage of land currently advertised for sale. Among cities in Union County with ranches, farms, hunting land and other rural land and acreage for sale, Creston had the most land for sale. Manufacturing and related services are the largest economic sectors in Union County. Union County is Iowa's 91st largest county (425 square miles). It's located in the Western Iowa region of Iowa.