| Birth Date: | 1 July 1978 |
| Birth Place: | Montreal, Quebec, Canada |
| Sport: | Synchronised swimming |
Catherine Garceau (born July 1, 1978) is a Canadian competitor in synchronized swimming and Olympic medalist. She participated in the Canadian team that received a bronze medal in synchronized team at the 2000 Summer Olympics in Sydney, Australia.
In 2012, Garceau authored "Swimming Out of Water," which was published by Morgan James Publishing.