Atchison is a city located in Atchison County Kansas. It is also the county seat of Atchison County. With a 2020 population of 10,348, it is the 36th largest city in Kansas and the 3020th largest city in the United States . Atchison is currently declining at a rate of -0.61% annually and its population has decreased by -6.11% since the most recent census, which recorded a population of 11,021 in 2010. Atchison reached it's highest population of 16,429 in 1910. Spanning over 8 miles, Atchison has a population density of 1,291 people per square mile.
The average household income in Atchison is $57,900 with a poverty rate of 18.21%. The median rental costs in recent years comes to $615 per month, and the median house value is $89,900. The median age in Atchison is 32.1 years, 31.2 years for males, and 33.5 years for females.