Kericho residents are mostly Christians. The most widespread church is the Africa Gospel Church, affiliated with The World Gospel Mission of the USA. The church has the biggest church in the district in the town (Immanuel AGC) and heart centers at Cheptenye, Chepkutung, Keongo, Kipkelion, Londiani, Kabianga and Kaptebeswet.
The other churches present in the district include AIC, Catholic Church, Anglican Church, SDA, Full Gospel and a host of Independent churches.
Kericho is also home to Africa's largest Gurudwara or Sikh place of worship. It is a monument, dedicated to the memory of "Baba Puran Singh Ji of Kericho" who was the founder of the international charitable organisation, Guru Nanak Nishkam Sewak Jatha which promotes the spirit and practice of selfless service ("nishkam sewa") in the name of Guru NanakDev Ji, the founder of the Sikh faith. The site has been gazetted by the Government of Kenya as a place of spiritual significance. Kericho also holds the Muslim faith with at least two mosques. There is also a Hindu population as well as a congregation of Jehovah's Witnesses
