Kikuyu is a town in Kiambu County, Kenya, which grew from a settlement of colonial missionaries. The town is located about 20 km (12 mi) northwest of central Nairobi. It is about 20 minutes from Nairobi via a number of routes, including a dual carriage road, and has a railway station on the Mombasa – Malaba Railway Line. The town is named after the Kikuyu/Gĩkũyũ people, the major ethnicity that settled in the area. As of 2019 the total population is 323,881.

Due to its geology and rich soil texture, the chief activities are livestock and crop farming. The jurisdiction also includes Ondiri Wetland which is the source of the Nairobi River. With the recent completion of the Southern Bypass that connects Mombasa to Nairobi via Kikuyu, the town is poised for greater growth as is the only town on the Bypass. Kikuyu hosts a Sub-County Administration which is the administrative division in Kiambu County.