Nandi County is in the North Rift of Kenya, occupying an area of 2,884.4 square kilometres. Its capital, Kapsabet, is the largest town in the county while other towns include Mosoriot, Kaiboi, Kabiyet and Nandi Hills. According to a 2019 census, the county had a population of 885,711, made up of a number of Kenyan communities, the majority of whom belong to the native tribe called Nandi.
Geographically, the unique jug-shaped structure of Nandi County is bound by the Equator to the south and extends northwards to latitude 0034’N. The western boundary extends to west. The county's major area is covered by the Nandi Hills.
Nandi County is home to many world record holders in athletics, including Kipchoge Keino, Henry Rono, Eliud Kipchoge, Pamela Jelimo, Janeth Jepkosgei, Moses Tanui, Julius Yego, Jairus Birech, Conseslus Kipruto and Bernard Lagat. There are 443 primary education schools and 80 secondary education schools in Nandi. Kapsabet Boys High school, situated in Kapsabet and founded in 1925, is a prominent national school. Its list of alumni includes cabinet ministers such as Nicholas Biwott, Kipruto Arap Kirwa, Henry Kosgey and William Arap Ruto who is currently the Kenyan Deputy President. Sports stars such as Julius Yego went here and a former President of Kenya, Daniel Arap Moi.