city, Johnson county, northeastern Kansas, U.S. Located on a low ridge that affords a broad view of the Missouri River valley, it is a southern suburb of Kansas City, near the Missouri border. Settled in 1906, it lies on the old Santa Fe Trail and was laid out as a stop on an interurban railway from Kansas City to Olathe; later it was the home of the first aviation school in the western United States. The city is now mainly residential, with several medical centres, and is the site of Johnson County Community College (1967). Inc. 1960. Pop. (1990) 111,790; (2000) 149,080.