Mark Garner (born 30 June 1969, in New South Wales) is a retired sprinter from Australia, who represented his native country at two consecutive Summer Olympics, starting in 1988 (Seoul, South Korea). His best result was winning the silver medal in the men's 4 × 400 m relay at the 1988 World Junior Championships.
| Representing | ||||||
|---|---|---|---|---|---|---|
| 1986 | World Junior Championships | Athens, Greece | 8th (sf) | 200m | 21.42 (wind: -0.6 m/s) | |
| 10th (h) | 4 × 100 m relay | 40.56 | ||||
| 9th (h) | 4 × 400 m relay | 3:09.65 | ||||
| 1988 | World Junior Championships | Sudbury, Canada | 9th (sf) | 200m | 21.21 (wind: +2.0 m/s) | |
| 10th (h) | 4 × 100 m relay | 40.67 | ||||
| bgcolor=silver | 2nd | 4 × 400 m relay | 3:07.60 | |||
| Olympic Games | Seoul, South Korea | 26th (qf) | 21.08 | |||
| 6th | 3:02.49 | |||||
| 1989 | World Cup | Barcelona, Spain | 8th | 400 m | 46.081 | |
| 7th | 4×400 m relay | 3:04.881 | ||||
| 1990 | Commonwealth Games | Auckland, New Zealand | 6th | 46.10 | ||
| – | DQ | |||||
| 1991 | World Indoor Championships | Seville, Spain | 8th (sf) | 47.06 | ||
| 4th | 3:08,49 | |||||
| World Championships | Tokyo, Japan | 8th | 45.47 | |||
| 1992 | Olympic Games | Barcelona, Spain | 28th | 46.85 | ||