Uasin Gishu County is one of the 47 counties of Kenya, located in the former Rift Valley Province. The city of Eldoret is the county's largest population center as well as its administrative and commercial center.

Uasin Gishu is located on a plateau and has a cool and temperate climate. The county borders Trans-Nzoia County to the north, Elgeyo-Marakwet and Baringo counties to the east, Kericho county to the south, Nandi county to the south, south-west and Kakamega county to the west.