Nikolaos Deligiannis (water polo)

Nikolaos "Nikos" Deligiannis (, born 3 September 1976 in Athens) is a Greek former water polo player who competed in the 2000 Summer Olympics (10th place), the 2004 Summer Olympics (4th place), the 2008 Summer Olympics (7th place) and the 2012 Summer Olympics (9th place) with the Greece men's national water polo team. He was also part of the Greece national squad who won the Bronze Medal in the 2005 World Championship in Montreal and the Bronze Medal in the 2004 World League in Long Beach.

At club level, Deligiannis had a long and successful career playing for Greek powerhouse Olympiacos for 14 years (2001–2015), with whom he won 1 LEN Champions League, 1 LEN Super Cup, 12 Greek Championships and 12 Greek Cups. He was also captain of Olympiacos for several years.

Club
Olympiacos
 * LEN Euroleague (1): 2001–02
 * LEN Super Cup (1): 2002
 * Greek Championship (12): 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011, 2013, 2014, 2015
 * Greek Cup (12): 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2013, 2014, 2015

National team

 * Bronze Medal in 2005 World Championship, Montreal
 * Bronze Medal in 2004 World League, Long Beach
 * 4th place in 2004 Olympic Games, Athens
 * 4th place in 2003 World Championship, Barcelona