Andover is a city located in Butler County Kansas. With a 2020 population of 13,639, it is the 26th largest city in Kansas and the 2464th largest city in the United States . Andover is currently growing at a rate of 0.87% annually and its population has increased by 15.67% since the most recent census, which recorded a population of 11,791 in 2010. Andover reached it's highest population of 13,639 in 2021. Spanning over 10 miles, Andover has a population density of 1,350 people per square mile.
The average household income in Andover is $107,640 with a poverty rate of 6.56%. The median rental costs in recent years comes to $1,304 per month, and the median house value is $201,000. The median age in Andover is 34.8 years, 34.3 years for males, and 35.8 years for females.