The area remained unclassified until 1905 or 1906 when it was admitted to the Naivasha Province as Uasin Gishu District.
In 1919, the colonial authorities split Trans Nzoia from Uasin Gishu District; as Elgeyo and Marakwet, then sub-districts were moved to Suk-Kamasia Reserve.
[1] Uasin Gishu was one of the forty districts of Kenya in 1963[2] In 1908, fifty eight families of Afrikaans-speaking South Africans "trekked" to the Uashin Gishu plateau from Nakuru after a journey from South Africa by sea and by rail from Mombasa.
[4] In 2010, as per the new law new counties were to be created based on the districts of Kenya that existed as at 1992.
In 1903 Theodor Herzl negotiated with British officials to obtain land for a permanent Jewish settlement.