A total of 2,000 acres were listed for sale in Kansas's Sumner County recently; the combined value of all Sumner County ranches, farms, hunting land and other rural land and acreage for sale was around $11 million. Sumner County ranks 31st in the Sunflower State for the total acreage of land currently advertised for sale. Among cities in Sumner County with land and rural real estate for sale, Wellington had the most land for sale. Sumner County is one of the ten biggest counties in Kansas (1,184 square miles). It's located in the Tallgrass Prairie Kansas region of Kansas.