Decatur County is in Central Iowa. Of the 99 counties in the Cyclone State, Decatur County is 66th in terms of its size (341,427 acres). Decatur County, Iowa, includes 1,000 acres of residential land and property for sale based on recent Land Network data. The combined market value of farms and ranches for sale here was almost $8 million. The average price of residential land for sale in Decatur County was $398,289. Browse all residential land and rural property for sale in Iowa to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.