Decatur County is in High Plains Kansas. Of the 105 counties in the Jayhawk State, Decatur County is 36th in terms of its size (894 square miles). The total value of nearly 1,000 acres of residential land recently listed for sale in Decatur County, Kansas, was nearly $1 million. The average price of residential land for sale in Decatur County was $239,725. The county has a rural, farm-based economy. Browse all residential land and rural property for sale in Kansas 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.