Nyeri is a town situated in the Central Highlands of Kenya. It is the county headquarters of Nyeri County. The town was the central administrative headquarters of the country's former Central Province. Following the dissolution of the former provinces by Kenya's new constitution on 26 August 2010, the city is situated about 150 km north of Kenya's capital Nairobi, in the country's densely populated and fertile Central Highlands, lying between the eastern base of the Aberdare Range, which forms part of the eastern end of the Great Rift Valley, and the western slopes of Mount Kenya.
The city population, according to the 2009 Kenya Population and Housing Census, was estimated at 325,357. However, the number is rapidly growing. There is, however, a significant population of primarily Government and corporate workers who ordinarily reside in Nyeri but who, during the census, choose to be counted in their areas of origin or the areas where their families are residents. The town has a relatively low cost of living in comparison to Nairobi and other major urban centres in Kenya. Located in Kenya's fertile highlands, food and water are plentiful and relatively cheap.