Ruiru is a city in Kiambu County, Kenya. It is located three kilometers from the city limits of Nairobi. Ruiru is a capital city of the capital and can be reached both by road and by rail. The population was in 1999 at 100,000, by 2005, it rose to about 220,000. The area is 292 km ², which is slightly less than the area of ​​the city of Leipzig. In the fertile countryside of the city are numerous coffee plantations.