| Onesmus Nyerere | |
| Birth Date: | 10 November 1983 |
| Birth Place: | Nyamira, Kenya |
| Sport: | Long-distance running |
| Event: | 10K, Half marathon, Marathon |
Onesmus Nyerere (born 10 November 1983) is a Kenyan former long-distance runner.
He was a member of the team that set the world record for the Ekiden road relay on 23 November 2005 in the International Chiba Ekiden. The team, which consisted of Nyerere alongside Josephat Ndambiri, Martin Mathathi, Daniel Muchunu Mwangi, Mekubo Mogusu and John Kariuki, finished in a time of 1:57:06.[1]
He ran his personal best time of 2:14:31 hours in the marathon at the Düsseldorf Marathon in 2008, where he finished 9th.