Troy Matthew Dumais (born January 21, 1980 in Ventura, California) is a competitive American diver from California. He has represented the United States in four Olympic Games: the 2000 Sydney Olympic Games, 2004 Athens Olympic Games, 2008 Beijing Olympic Games, and 2012 London Olympic Games. At the 2012 Olympic Games in London he and partner Kristian Ipsen won the bronze medal in the synchronized 3m with a score of 446.7.
Troy was raised in a family of divers and swimmers and has three brothers and one sister. At the 2004 Summer Olympic Games in Athens Troy placed 6th in the Men’s 3m Synchronized Spring Board with his brother, Justin Dumais.