Located in Tallgrass Prairie Kansas, 1,184-square-mile Sumner County is one of the ten biggest counties in the Wheat State. There is about 1,000 acres of residential land for sale in Sumner County, Kansas, based on recent Land Network data, making it the most common type of land for sale in Sumner County. The combined market value of land for sale here is nearly $7 million. The average price of residential acreage for sale in Sumner County was $301,741. 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.