The Kipsigis or Kipsigiis are a Nilotic people contingent of the Kalenjin ethnic group and speak a dialect of Kalenjin language identified by their community eponym, Kipsigis. It is observed that the Kipsigis and an aboriginal people native to Kenya known as Ogiek have a merged identity. The Kipsigis are the most numerous of the Kalenjin. The latest census population in Kenya put the Kipsigis at 1.972 Million speakers, accounting for 45% of all Kalenjin speaking people. They occupy the highlands of Kericho stretching from Timboroa to Mara River in the south, the west of Mau Escarpment in the east to Kebeneti in the west. They also occupy parts of Laikipia, Kitale, Nakuru, Narok, Trans Mara District, Eldoret and Nandi Hills.
Apart from the Kalenjin, the other tribe in this group is the Tatonga of Western Tanzania. In their expansion Southwards, the Kipsigis and the Tatonga people reached present-day Shinyanga Area in Western Tanzania only for the former group to return to the Kericho