Kericho County is one of the counties the republic of Kenya. The county seats between longitude 35°02' and 35°40' East and between the equator and latitude 0°23' South with an altitude of about 2002m above the sea level. It borders Uasin Gishu County to the North West, Baringo County to the North, Nandi County to the North-West, Nakuru County to the East and Bomet County to the South. It has a population of 901,777 (2019 census) and an area of 2,111 km².Its capital and largest town is Kericho.

Kericho County is home to the best of Kenyan Tea which is renowned worldwide for its taste with its town square even known as Chai Square. Some of the largest tea companies including Unilever Kenya, James Finlay and Williamson Tea are based here. It is also home to the popular Ketepa brand.

The defunct Buret District is now part of Kericho County.