Kiambu West District was carved out of the former Kiambu District in 2005 and comprises all constituencies to the west of the Kikuyu, Wangige, Kiambu road. The district has its headquarters in Limuru town which is about 40 kilometres west of Nairobi and half a kilometre off the Nairobi-Nakuru highway. Some of the divisions found in Kiambu west include Kikuyu and Lari.