Decatur County is in Central Iowa. Of the 99 counties in the Hawkeye State, Decatur County ranks 66th in terms of size (533 square miles). A recent survey of Land Network data totals 1,000 acres of residential land and property for sale in Iowa's Decatur County, which is valued at a combined $8 million. The average price of residential acreage for sale in Decatur County was $384,486. 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.