an Entity references as follows:
Johnson County is a county in the U.S. state of Kansas, on the border with Missouri. As of the 2020 census, the population was 609,863, making it the most populous county in Kansas. Its county seat is Olathe. Largely suburban, the county contains a number of suburbs of Kansas City, Missouri, including Overland Park, a principal city of and second most populous city in the Kansas City Metropolitan Area.