Decatur County is in Central Iowa. Of the 99 counties in the Hawkeye State, 341,427-acre Decatur County ranks 66th by size. Recent listings of residential land and property for sale in Decatur County, Iowa, totals about 1,000 acres and a combined market value of about $6 million. The most common type of land for sale by combined acreage in Decatur County is house. The average price of residential acreage for sale in Decatur County was $279,168. 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.