and has a population of 2,417,735. The county is 40% rural and 60% urban owing to Nairobi's consistent growth Northwards. The Kikuyu are the dominant tribe in the county.In 2007, Kiambu District was subdivided in two: Kiambu East and Kiambu West. Kiambu West district took Limuru, Lari and Kikuyu divisions, with Limuru as its district capital.