Gregg Troy (born 19 December 1950) is an American college and Olympic swimming coach. He is the current head coach of the Florida Gators swimming and diving teams of the University of Florida. Troy previously served as an assistant coach for the U.S. Olympic men’s swim team in 1996 and 2008, and he was the head coach of the 2012 U.S. Olympic men’s swim team that competed at the 2012 London Olympics.