Carnegie Free Library in Burlington, Kansas, Coffee County, 201 N. 3rd Street, Burlington, KS – Shamera, CC BY-SA 4.0 – Wikimedia Commons Coffey County is located in Kansas. About 8,360 people live here (as of 2020). Between 2010 and 2020, the population declined from 8,601 to 8,360. The area covers about 1,695.0 square kilometers. The region is divided into 6 Municipalities. The region was founded in 1855. Coffey County is county in East-Central Kansas, United States. More information at CoffeyCountyKS.org.