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County Information



Some of the cities, towns, and places in Sumner County are Adamsville, Anson, Argonia, Ashton, Belle Plaine, Caldwell, Cicero, Conway Springs, Corbin, Cowley County, Dalton, Drury, Ewell, Geuda Springs, Hunnewell, Mayfield, Milan, Milton, Mulvane, Oxford, Peck, Perth, Portland, Riverdale, Rome, Sedgwick County, South Haven, Suppesville, Wellington, Zyba

Sumner County  Image

Sumner County (standard abbreviation: SU) is a county located in the U.S. state of Kansas. As of the 2020 census, the population was 22,382. Its county seat is Wellington.