Olga Kotlyarova (born 12 April 1976 in Sverdlovsk) is a Russian runner. She used to compete mainly in 400 metres, and has an Olympic bronze medal from 2000 in relay. She is also a world champion (indoor and outdoor) in this event.
In 2005, she concentrated more on the 800 metres distance, managing to set a new personal best and to finish fourth at the World Athletics Final.
In August 2006 she became the European Champion in the 800 metres.
| 1994 | World Junior Championships | Lisbon, Portugal | 20th (qf) | 200 m | 24.58 | wind: +0.4 m/s |
| 4th | 4 × 400 m relay | 3:37.41 | ||||
| 1996 | Stockholm, Sweden | 2nd | 400 metres | 51.70 | ||
| 1997 | Paris, France | 1st | 4 × 400 m relay | 3:26.84 | ||
| World Student Games | Catania, Italy | 2nd | 400 metres | 51.35 | ||
| 1998 | European Championships | Budapest, Hungary | 3rd | 400 metres | 50.38 | |
| 2nd | 4 × 400 m relay | 3:23.56 | ||||
| 1999 | Maebashi, Japan | 1st | 4 × 400 m relay | 3:24.25 | ||
| Seville, Spain | 1st | 4 × 400 m relay | 3:21.98 | |||
| 2000 | Summer Olympics | Sydney, Australia | 3rd | 4 × 400 m relay | 3:23.46 | |
| 2001 | Lisboa, Portugal | 2nd | 400 metres | 51.56 | ||
| 1st | 4 × 400 m relay | 3:30.00 | ||||
| 2004 | Budapest, Hungary | 1st | 4 × 400 m relay | 3:23.88 | ||
| 2006 | Gothenburg, Sweden | 1st | 800 m | 1:57.38 |