Elk County is a county located in the U.S. state of Kansas. Its county seat and most populous city is Howard. As of the 2020 census, the county population was 2,483. The county was named for the Elk River.

Chautauqua County is a county located in Southeast Kansas, United States. Its county seat and most populous city is Sedan. As of the 2020 census, the county population was 3,379. The county is named for Chautauqua County, New York, the birthplace of Edward Jaquins, a Kansas politician who was instrumental in getting the county established.