| Karin van Wirdum | |
| Fullname: | Karin Tracey van Wirdum |
| National Team: | Australia |
| Strokes: | Freestyle |
| Club: | Redcliffe Leagues SC |
| Birth Date: | 9 April 1971 |
| Birth Place: | Brisbane, Queensland |
| Height: | 1.6m (05.2feet) |
| Weight: | 52kg (115lb) |
Karin Tracey van Wirdum (born 9 April 1971)[1] is a former freestyle swimmer from Australia, who competed in three consecutive Summer Olympics for her native country, starting in 1988. She won the gold medal in the 100-metre freestyle at the 1990 Commonwealth Games and in the 50-metre freestyle at the 1994 Commonwealth Games.