Lenexa is a city in the central part of Johnson County, locate in northeast Kansas, in the central United States of America. The population was estimated to be 43,434 in the year 2005. It is the fourth most populous city in the county. As a satellite city of Kansas City, Missouri, Lenexa is included in the Kansas City Metropolitan Area. It is bordered by the cities of Shawnee to the north, Overland Park to the east, and Olathe to the south.