Twelve men's teams and eight women's teams qualified for Water polo at the 2008 Summer Olympics.
Men
Water Polo Men Date Host Vacancies Qualified Host nation – – 1 China 2007 FINA World Championships Mar 17 – Apr 1, 2007 Melbourne 3 Croatia Hungary 2007 World League Jul 3 – Aug 12, 2007 Berlin^ 1 Serbia European Qualification Tournament Sep 2–9, 2007 Bratislava 1 Montenegro 2007 Pan American Games Jul 13–29, 2007 Rio de Janeiro 1 United States Oceania Qualification Tournament Nov 30 – Dec 2, 2007 Auckland 1 Australia Olympic Qualification Tournament Mar 2–9, 2008 Oradea 4 Germany Italy Greece Canada TOTAL 12 ^Berlin is the host of the super-final only.
Women
Water Polo Women Date Host Vacancies Qualified Host nation – – 1 China European Qualification Tournament Aug 19–26, 2007 Kirishi 1 Netherlands 2007 Pan American Games Jul 13–29, 2007 Rio de Janeiro 1 United States Oceania Qualification Tournament Dec 17–19, 2007 Brisbane 1 Australia Olympic Qualification Tournament Feb 17–24, 2008 Imperia 4 Italy Russia Hungary Greece TOTAL 8