The total value of farms, ranches, and rural real estate for sale in Sioux County, Iowa, recently on Land.com was $19 million. This represents 1,000 acres of farms, ranches, hunting land and other land for sale in Sioux County. Sioux County ranks 47th out of 99 counties in the Wrestling State for the total number of acres of land currently advertised for sale. Sioux Center had the most land for sale. Sioux County is one of the ten largest counties in Iowa (768 square miles). It's located in the Western Iowa region of the state.