Sumner County is located in south-central Kansas twenty-three miles south of Wichita and abutting the Oklahoma border. The county encompasses 1,182 square miles and is home to eleven incorporated communities: Argonia, Belle Plaine, Caldwell, Conway Springs, Gueda Springs, Hunnewell, Mayfield, Milan, Oxford, South Haven, and Wellington. A portion of the City of Mulvane also lies in Sumner County. There are also a number of smaller communities located within the county that are not incorporated.
For current data about Sumner County, visit the Greater Wichita Economic Development Coalition's (GWEDC) website. GWEDC is a Chamber affiliate.