Ruaka is a town in Kiambu County, Kenya. The city is located north west of Nairobi, at the western end of the Northern Bypass on the Nairobi-Limuru Road. Ruaka is part of the larger Nairobi Metropolitan Conurbation. It is bounded by Gigiri to the south and east. The town formed part of the former Karuri Town Council local authority area. Ruaka is the home to the Two Rivers Mall, the largest mall in Kenya.