It is the capital of Kiambu County, which bounds the northern border of Nairobi.

Apart from central Kiambu, there are villages such as Ndumberi, Ting'ang'a, Riabai, Kihingo, Ngegu, Kanunga, and Kangoya among others.

The town's administration is under the County Government of Kiambu, which came into force with the promulgation of Kenya's constitution in 2010.

[3] Kiambu Club opened in 1916, is one of the oldest nine-hole golf courses in Kenya.

Most of the population in Kiambu are Christians and a small percentage are either Muslims, Massais, Njemps, and Arabs