Dénes Kemény is a former Hungarian water polo player who was the head coach of the Hungarian men's national water polo team from 1997 to 2012 and president of the Hungarian Water Polo Federation. As a player, he was a member of the European Junior Champion team in Duisburg in 1973. Under his leadership the Hungarian national team became one of the most successful teams in the world winning the Olympic Games in 2000, 2004 and 2008, the Water Polo World Championship in 2003, the FINA Water Polo World League in 2003 and 2004, the FINA Water Polo World Cup in 1999, and the Water Polo European Championship in 1997 and 1999. He was granted the Hungarian Coach of the Year award five times (1999, 2000, 2003, 2004, 2008).