A total of approximately 1,000 acres were listed for sale in Iowa's Monona County recently, representing a total value of approximately $12 million in Monona County land and rural real estate for sale. Monona County ranks 80th in Iowa for the total number of acres of land currently advertised for sale. Onawa had the most land for sale. Its economy is defined as agricultural, with 538 farms recorded in the county during the most recent U.S. Census. Farming activities in Monona County generate annual revenues of $23 million, most of which is from crops. Monona County is Iowa's 16th largest county (698 square miles). It's located in the Western Iowa region of the state.