Cornelius Chirchir (born 5 June 1983 in Bomet) is a Kenyan runner who specializes in the 1500 metres. He holds the world junior record over the distance with 3:30.24 minutes, achieved on 19 July 2002 in Monte Carlo. He came close to the record in 2004 with 3:30.60 min, but never since.
He is based at the PACE Sports Management camp in Kaptagat.
| Representing | ||||||
|---|---|---|---|---|---|---|
| 1999 | World Youth Championships | Bydgoszcz, Poland | 1st | 1500m | 3:44.02 | |
| 2000 | World Junior Championships | Santiago, Chile | bgcolor=gold | 1st | 1500m | 3:38.80 |
| 2002 | African Championships | Radès, Tunisia | 4th | 1500m | 3:39.67 | |
| IAAF Grand Prix Final | Paris, France | 3rd | 1500m | 3:31.51 | ||
| 2003 | World Indoor Championships | Birmingham, England | 4th | 1500m | 3:43.03 | |
| World Athletics Final | Monte Carlo, Monaco | 6th | 1500m | 3:41.77 | ||