Winfield is a city located in Kansas. With a 2020 population of 11,821, it is the 31st largest city in Kansas and the 2749th largest city in the United States. Winfield is currently declining at a rate of -0.99% annually and its population has decreased by -3.90% 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 1,061 people per square mile.
The average household income in Winfield is $56,042 with a poverty rate of 18.26%. The median rental costs in recent years comes to $711 per month, and the median house value is $85,700. The median age in Winfield is 35.7 years, 34.7 years for males, and 37.4 years for females. For every 100 females there are 111.4 males.