Kapsowar is a small town in Elgeyo-Marakwet County, Kenya. Prior to March 2013, it was located in the former Rift Valley Province. In 1994, Kapsowar became the headquarters of the former Marakwet District. Prior to this, the Marakwet and Keiyo tribes were collectively grouped into the Elgeiyo-Markwet District. In 2010, the two districts were again merged into Elgeyo-Marakwet County. The Marakwet number approximately 200,000 and are a part of the Kalenjin family of tribes, which collectively are the second-largest ethnic group in Kenya.