Wellington is a city located in Sumner County Kansas. It is also the county seat of Sumner County. With a 2020 population of 7,504, it is the 47th largest city in Kansas and the 3781st largest city in the United States . Wellington is currently declining at a rate of -1.04% annually and its population has decreased by -8.17% since the most recent census, which recorded a population of 8,172 in 2010. Wellington reached it's highest population of 8,809 in 1960. Spanning over 8 miles, Wellington has a population density of 1,025 people per square mile.
The average household income in Wellington is $57,331 with a poverty rate of 16.95%. The median rental costs in recent years comes to $745 per month, and the median house value is $75,400. The median age in Wellington is 37.8 years, 34 years for males, and 41.1 years for females.