Winfield is a city located in Cowley County Kansas. It is also the county seat of Cowley County. With a 2020 population of 11,765, it is the 31st largest city in Kansas and the 2764th largest city in the United States . Winfield is currently declining at a rate of -0.75% annually and its population has decreased by -4.36% since the most recent census, which recorded a population of 12,301 in 2010. Winfield reached it's highest population of 12,334 in 2010. Spanning over 13 miles, Winfield has a population density of 1,056 people per square mile.
The average household income in Winfield is $57,730 with a poverty rate of 16.51%. The median rental costs in recent years comes to $720 per month, and the median house value is $91,500. The median age in Winfield is 35.7 years, 34.3 years for males, and 37.8 years for females.