Coffey County is a county located in Eastern Kansas. Its county seat and most populous city is Burlington. As of the 2020 census, the county population was 8,360. It was named after A.M. Coffey, a territorial legislator and Free-Stater during Bleeding Kansas era.

Burlington is a city in and the county seat of Coffey County, Kansas, United States. As of the 2020 census, the population of the city was 2,634.