
Wellington
- County:
- Sumner County
- County Seat:
- Yes
- Area (mi²):
- 7.618
- State:
- Kansas
Wellington is a city located in Sumner County, Kansas. Wellington has a 2025 population of 7,492. It is also the county seat of Sumner County. Wellington is currently declining at a rate of -0.5% annually and its population has decreased by -2.47% since the most recent census, which recorded a population of 7,682 in 2020.
The average household income in Wellington is $61,786 with a poverty rate of 14.31%. The median age in Wellington is 39.4 years: 38.5 years for males, and 40.1 years for females.