1736 E Harold St, Olathe, KS 66061
Olathe ( oh-LAY-tha) is the county seat of Johnson County, Kansas, United States. It is the fourth-most populous city in both the Kansas City metropolitan area and the state of Kansas, with a 2020 population of 141,290. == History == === 19th century === Olathe was founded by John T. Barton in the spring of 1857. He rode to the center of Johnson County, and staked two quarter sections of land as the town site. He later described his ride to friends: "...the prairie was covered with verbena and other wild flowers.