Anson is located near the central portion of the county.
Argonia (pop. 529) is located in the west central part of the county near the Harper County line. Argonia is famous for electing the first woman mayor in our country.
Ashton is in the southeastern part of the county.
Belle Plaine (pop. 1,649)is the second largest city in Sumner County and is located in the northeastern part of the county.
Caldwell (pop. 1,351) is in the southwestern part of the county near the Oklahoma border. Caldwell is along the Chisholm Trail, and is rich in it's cowboy and gunfighter history.
Conway Springs (pop. 1,384) is in the northwestern part of the county and is famous for it's natural spring drinking water.
Corbin is in southwestern Sumner County.
Dalton is in the eastern central part of the county.
Drury is in the south-central part of Sumner County near the Oklahoma border.
Geuda Springs (pop. 219) is in the southeastern part of the county and lies across the Sumner/Cowley County lines.
Hunnewell (pop. 87) is in extreme south-central Sumner County at the Oklahoma state line.
Mayfield (pop. 110) is in the central portion of Sumner County.
Milan (pop. 109) is in the western central part of the county.
Millerton is in northwestern Sumner County.
Milton is in northwestern Sumner County.
Mulvane (pop. 5,101) is in northeastern Sumner County and lies across the Sumner/Sedgwick County border.
Oxford (pop 1,142) is in the far eastern part of the county near the Cowley County border.
Peck is in the far north-central part of the county and lies across the Sumner/Sedgwick County line.
Perth is in south central Sumner County.
Portland is in south-central Sumner County.
Riverdale is in north-central Sumner County.
Rome is in south-central Sumner County.
South Haven (pop. 420) is in south central Sumner County.
Wellington (pop. 8,411) is in central Sumner County, and serves as the county seat.