Kapsowar is a small town Elgeyo-Marakwet County in the former Rift Valley Province, Kenya. 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.