The value of all land and rural real estate for sale in Iowa's Calhoun County recently was almost $10 million, representing a combined 990 acres of land for sale in Calhoun County. Calhoun County ranks 62nd in the Cyclone State for the total acreage of land currently advertised for sale. Of all locations in Calhoun County with farms, ranches, and rural real estate for sale, Rockwell City featured the most land for sale. Agriculture and farming drives the Calhoun County economy, with 826 farms recorded in the county during the U.S. Census in 2012. Farming activities in Calhoun County generate annual revenues of $30 million, most of which is from crops. Calhoun County is the 52nd largest county (572 square miles) in Iowa. It's located in the Western Iowa region of Iowa.