Nyandarua County is Located in Central Kenya. It covers an area of 3,245.3 sq km. It has temperature range of 12°C - 25°C. and rainfall of between 700mm and 1,500mm per annum. The county is characterized by high horticultural productivity of the small scale farms. The bordering counties are Laikipia to the North and North East, Nyeri and Murang'a to the East, Kiambu to the South, and Nakuru to the South West and West. Nyandarua County has population of 596,268 people.
Agriculture forms the backbone of the economy of Nyandarua County with farming and livestock rearing in large ranches being extensively practiced. Areas close to its highland regions receive high rainfall amaking them suitable for crop agriculture. The county has also a good water resources with several rivers such as Malewa, Ewaso Nyiro, and Pesi passing through the county. It also has potential for underground water harvesting with its permeable and impervious bedrock system.
The county has had long years of a challenge of accessibility but the new Dundori-Ol-Kalou-Njabini road has eased the problem. The road passes through Ndundori, Tumaini, Ol Kalou, Wanjohi and Miharati in Nyandarua Central and Kipipiri districts, passing through Mawingu, Ndunyu Njeru and Engineer in North Kinangop. It connects to the old tarmac road that runs from Fly Over area on the Nairobi-Nakuru Highway at Njabi-ini Trading Centre in South Kinagop.