Nyandarua District was an administrative district in the Central Province of Kenya. Its capital town was Ol Kalou. Formerly the capital was Nyahururu, but was moved to Laikipia District. Nyandarua District had a population of 479,902 and an area of 3,304 km².[1] The district was located in the northwestern part of the Central Province, west of the Aberdare Range.
The district was split into two in 2007: Nyandarua North District and Nyandarua South District. However with constitution of Kenya, promulgated in 2010, the district ceased to exist. Nyandarua County was created out of the then-abolished Nyandarua District.
Nyandarua county council headquarters were located in Nyahururu town, which was later moved to Laikipia District.