Zachary Whitmarsh (born April 5, 1977 in Victoria, British Columbia) is a track and field athlete from Canada, who competes in the middle distance events. He represented his native country at the 2000 Summer Olympics, finishing in 39th place in the men's 800 metres. He won the bronze medal in the men's 800 metres at the 1999 Pan American Games in Winnipeg.
| Representing | ||||||
|---|---|---|---|---|---|---|
| 1995 | Pan American Junior Championships | Santiago, Chile | bgcolor=gold | 1st | 800 m | 1:50.39 |
| 4th | 4 × 400 m relay | 3:13.85 | ||||
| 1996 | World Junior Championships | Sydney, Australia | 7th | 800 m | 1:50.26 | |
| 10th (h) | 4 × 400 m relay | 3:12.03 | ||||
| 1997 | Jeux de la Francophonie | Antananarivo, Madagascar | bgcolor=silver | 2nd | 800 m | 1:48.02 |
| 1999 | Pan American Games | Winnipeg, Canada | 3rd | 800 m | 1:45.94 | |
| World Championships | Seville, Spain | 23rd (h) | 800 m | 1:47.01 | ||
| 2000 | Olympic Games | Sydney, Australia | 39th (h) | 800 m | 1:48.42 | |
| 2001 | Jeux de la Francophonie | Ottawa, Canada | 3rd | 800 m | 1:46.90 | |
| 2002 | Commonwealth Games | Manchester, United Kingdom | 15th (sf) | 800 m | 1:49.61 | |