Traditional Kalenjin society is the way of life that existed among the Kalenjin-speaking people prior to the advent of the colonial period in Kenya and after the decline of the Chemwal, Lumbwa and other Kalenjin communities in the late 1700s and early 1800s.

The Kalenjin are a group of tribes indigenous to East Africa, residing mainly in what was formerly the Rift Valley Province in Kenya and the Eastern slopes of Mount Elgon in Uganda. They number 6,358,113 individuals per the Kenyan 2019 census and an estimated 273,839 in Uganda according to the 2014 census mainly in Kapchorwa, Kween and Bukwo districts.