Water polo has been part of the Summer Olympics program since the second games, in 1900. A women's water polo tournament was introduced for the 2000 Summer Olympics. Hungary has been the most successful country in men's tournament, while the United States is the only team to win multiple times at the women's tournament since its introduction. Italy was the first to win both the men's and women's water polo tournaments.
Hungary competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. Hungarian athletes have competed at every Summer Olympic Games in the modern era, except the 1920 Summer Olympics in Antwerp, and the 1984 Summer Olympics in Los Angeles because of the Soviet boycott. The Hungarian Olympic Committee sent the nation's smallest delegation to the Games since 1956 to London. A total of 159 athletes, 97 men and 62 women, competed in 18 sports.
Greece competed at the 2012 Summer Olympics in London, United Kingdom, from 27 July to 12 August 2012. The Hellenic Olympic Committee sent a total of 103 athletes to the Games in London, 65 men and 38 women, to compete in 19 sports. Men's water polo was the only team event in which Greece was represented at these Olympic Games.
The men's tournament of water polo at the 2012 Summer Olympics at London, Great Britain, began on 29 July and lasted until 12 August 2012. All games were held at the Water Polo Arena.
The FINA Water Polo World Rankings is a ranking system for men's and women's national teams in water polo. The teams of the member nations of FINA, water polo's world governing body, are ranked based on their competitions results with the most successful teams being ranked highest.
This article lists various water polo records and statistics in relation to the Australia men's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Great Britain men's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Australia women's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Italy women's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Hungary women's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Spain women's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Netherlands women's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Russia women's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Belgium men's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Canada women's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Greece women's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the China women's national water polo team at the Summer Olympics.
This article lists various water polo records and statistics in relation to the Canada men's national water polo team at the Summer Olympics.
United Kingdom 
Croatia (men)
United States (women)
Italy (men)
Spain (women)
Serbia (men)
Australia (women)
Montenegro (men)
Hungary (women)
