Chiel Mathijs Warners (born 2 April 1978 in Harderwijk, Gelderland) is a former Dutch decathlete.
| Representing | |||||
|---|---|---|---|---|---|
| 1996 | Sydney, Australia | 3rd | Decathlon | 7368 pts | |
| 1997 | European Junior Championships | Ljubljana, Slovenia | 1st | Decathlon | 7664 pts |
| Universiade | Catania, Italy | – | Decathlon | DNF | |
| 1999 | Götzis, Austria | 5th | Decathlon | 8363 pts | |
| European U23 Championships | Gothenburg, Sweden | — | Decathlon | DNF | |
| Seville, Spain | — | Decathlon | DNF | ||
| 2000 | Ghent, Belgium | 7th | Heptathlon | 5830 pts | |
| Götzis, Austria | — | Decathlon | DNF | ||
| 2001 | Götzis, Austria | 8th | Decathlon | 8085 pts | |
| Edmonton, Canada | 16th | Decathlon | 7916 pts | ||
| 2002 | Götzis, Austria | — | Decathlon | DNF | |
| 2003 | Götzis, Austria | 11th | Decathlon | 7739 pts | |
| Paris, France | 11th | Decathlon | 7753 pts | ||
| 2004 | Götzis, Austria | 5th | Decathlon | 8301 pts | |
| Athens, Greece | 5th | Decathlon | 8343 pts | ||
| 2005 | Madrid, Spain | 4th | Heptathlon | 6055 pts | |
| Götzis, Austria | 12th | Decathlon | 7836 pts | ||