Lenexa is a city in Johnson County, Kansas, United States. It is the 8th most populated city in the Kansas City Metropolitan Area and 9th most populated of Kansas. As of the 2020 census, the population of the city was 57,434. It is the birthplace of Garmin and the regional headquarters of Kiewit Construction. It is bordered by the cities of Shawnee to the north, Overland Park to the east, De Soto to the west and Olathe to the south.