Johnson County is a county in the U.S. state of Kansas, located along the state's eastern border with Missouri. Its county seat is Olathe. As of the 2020 census, the population was 609,863, making it the most populous county in Kansas. The county was named after Thomas Johnson, a Methodist missionary who was one of the state's first settlers. Largely suburban, the county contains a number of suburbs of Kansas City, Missouri, including Overland Park, a principal city of and the second most populous city in the Kansas City Metropolitan Area.
- Country
- United States
- Inception
- 1861
- Website
- http://www.jocosheriff.org/
