Land for sale in Calhoun County recently totaled almost $7 million and approximately 1,000 acres. Calhoun County ranks 83rd in the Wrestling State for the total acreage of land currently advertised for sale. Manson had the most land for sale. Its economy is defined as agricultural, with 826 farms recorded in the county during the most recent U.S. Census. 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.