Dénes Kemény (born 14 June 1954) is a former Hungarian water polo player who was the trainer and president of the Hungary men's national water polo team from 1997 to 2012.

During his reign the Hungarian team won at least a medal in 24 of its 29 major tournaments, including three Olympic golds in a row between 2000 and 2008, making him one of the most successful water polo coaches in Olympic history.

As a player, he was a member of the European Junior Champion team in Duisburg in 1973.

He was granted the Hungarian Sports President of the Year award five times (1999, 2000, 2003, 2004, 2008).

This biographical article relating to a Hungarian water polo figure is a stub.