A total of approximately 1,000 acres were listed for sale in Monona County, Iowa, recently, representing a total value of around $5 million in Monona County farms, ranches, hunting land and other land for sale. Monona County ranks 90th in the state for the total acreage of land currently advertised for sale. Of all land for sale in Monona County, Onawa featured 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 the 16th largest county (698 square miles) in Iowa. It's located in the Western Iowa region of the state.