The County is divided into 6 Sub-Counties, namely Baringo South, Mogotio, Eldama Ravine, Baringo Central, Baringo North and Tiaty.
The County occupies an area of 11,015 square kilometers and had a population of 555,561 people in 2009 and projected to be 723,411, 853, 515 in 2017 and 2022 respectively. The main ethnic communities inhabiting Baringo County are the Tugen, Pokot and Ilchamus with minority groups such as the Endorois, Nubians, Ogiek, Kikuyu and Turkana.