Denis Constantin (born 29 July 1980) is a former Mauritian badminton player, and later represented Australia. He was the men's singles gold medallist at the 2000 African Championships, and in the men's doubles event partnered with Eddy Clarisse. He then defend the men's doubles gold in 2002 partnered with Stephan Beeharry. Constantin competed for Mauritius at the 1998, and 2002 Commonwealth Games, also at the 2000 Summer Olympics. He was awarded Athlete of the Month by the Mauritius Sports Council in June 2001. Constantin graduated from the La Trobe University in Melbourne, and now work as physiotherapists.