Decatur County is in Central Iowa. Of the 99 counties in the Hawkeye State, Decatur County is 66th in terms of its size (341,427 acres). The total value of about 1,000 acres of residential land recently listed for sale in Iowa's Decatur County was nearly $5 million. The average price of residential land for sale in Decatur County was $370,566. 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.