Sumner County, Kansas

Sumner County, Kansas
Location within the U.S. state of Kansas
Coordinates: 37°14′N 97°29′W / 37.233°N 97.483°W / 37.233; -97.483
Country United States
State Kansas
FoundedDecember 20, 1870
Named afterCharles Sumner
SeatWellington
Largest cityWellington
Area
 • Total
1,185 sq mi (3,070 km2)
 • Land1,182 sq mi (3,060 km2)
 • Water3.0 sq mi (7.8 km2)  0.3%
Population
 (2020)
 • Total
22,382
 • Estimate 
(2023)
22,334
 • Density18.94/sq mi (7.311/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Area code620
Congressional district4th
WebsiteCounty website

Sumner County is a county located in the U.S. state of Kansas. Its county seat is Wellington. As of the 2020 census, the population was 22,382. The county is named after Charles Sumner, a U.S. Senator from Massachusetts who was a leader of Reconstruction politics.