Christopher Koskei (also written Kosgei, born 14 August 1974) is a Kenyan runner who specialized in the 3000 metres steeplechase.

He became known when he, running barefoot, won the silver medal at 1995 World Championships.

But at the beginning of October 1998, he met in Iten the Italian coach Renato Canova, in Kenya for the first time together with his manager Gianni Demadonna.

He is the elder brother of the current world record holder Stephen Cherono (Saif Saaeed Shaheen), who followed the same coach.

Koskei has another brother, Abraham, who likewise follows the family tradition of steeplechasing.