Susan Gardiner (born April 13, 1980) is a Canadian water polo player.
Gardiner is a former student at the University of British Columbia. She was a member of the Canadian team at the 2004 Summer Olympics, the 2000 Summer Olympics and the bronze medal-winning team at 2001 World Aquatics Championships in Fukuoka, Japan.
Gardiner is an alumnus and past coach of the Vancouver-based Pacific Storm Water Polo Club.