Canada competed at the 2000 Summer Olympics in Sydney, Australia. 294 competitors, 150 men, and 144 women, took part in 175 events in 29 sports.
Mexico competed at the 2000 Summer Olympics in Sydney, Australia.
The Republic of China competed as Chinese Taipei at the 2000 Summer Olympics in Sydney, Australia. The change in name was due to the political status of Taiwan. In addition, they flew a flag especially designed for the games separate from the flag of the Republic of China. In Mainland China, the team is known as the "Zhongguo Taibei Team" (中国台北队), and in Taiwan the team is known as the "Zhonghua Team" (中華隊).
Natalia Hadjiloizou is a professional Cypriot swimmer.
Ecuador competed at the 2000 Summer Olympics in Sydney, Australia.
Allison Ann Higson, later known by her married name Allison Cavanaugh, is a former 2-time Olympic breaststroke, individual medley, and freestyle swimmer from Canada. Born in Mississauga, Ontario, she grew up in Brampton, Ontario, a suburb of Toronto. She now lives in Traverse City, Michigan with her husband, Sean, and 2 children.
Kristin Louise Topham is a Canadian former competitive swimmer who represented Canada in international championship competitions in the late 1980s and early 1990s.
Sophie Simard is an international freestyle and butterfly swimmer who competed for Canada at the 1996 Summer Olympics in Atlanta, Georgia. There she swam in the preliminary heats of the 4x200-metre freestyle relay, alongside Joanne Malar, Marianne Limpert, and Jessica Deglau. In the final she and Malar were replaced by Shannon Shakespeare and Andrea Schwartz. The resident of Sainte-Foy, Quebec was also a member of the Canadian national swimming team at the 2006 Commonwealth Games in Melbourne, Australia.
Mary Beth Pauline Stewart, also known by her married name Mary McIlwaine, is a Canadian former competitive swimmer.
Andrew Astbury is an English former competitive swimmer who represented Great Britain at the Olympics and England in the Commonwealth Games in the late 1970s and early 1980s.
Comoros took part in the 2008 Summer Olympics, held in Beijing, China from 8 to 24 August 2008. It was Comoros's fourth appearance in the summer Olympics since its debut in 1996. The Comoros team included three athletes: runners Mhadjou Youssouf and Feta Ahamada, and swimmer Mohamed Attoumane. Ahamada, a 100 metres sprinter, was the flag bearer for the opening ceremony, the first woman to be given the honour. None of the Comoros athletes progressed further than the qualifying heats.
Niger sent five athletes, their second largest contingent ever, equalling the most sports in which they have participated. to compete at the 2008 Summer Olympics in Beijing, China. It was Niger's 10th Olympics; their only medalist has been Issaka Dabore, in boxing, at the 1972 games.
Hugues Legault is a former freestyle swimmer who represented Canada at the 1996 Summer Olympics in Atlanta, Georgia. Legeault competed in the preliminary heats of the men's 50-metre freestyle, but did not advance. He finished 39th overall in a field of 64.
Tamara Virgi Costache is an Olympic and former world record-holding freestyle swimmer from Romania. She swam for Romania at the 1988 Olympics.
Savannah King is a competition swimmer from Canada, who competes primarily in the freestyle events. She claimed a bronze medal in the 800-metre freestyle at the 2007 Pan American Games in Rio de Janeiro, Brazil. She also won a silver medal in the 4x200-metre freestyle relay by participating in the preliminary heats.
Jill Ann Sterkel is an American former competition swimmer, Olympic champion, and former world record-holder. Sterkel won four medals in three Olympic Games spanning twelve years. She was the women's head coach of the Texas Longhorns swimming and diving team at the University of Texas at Austin from 1992 to 2007.
Comoros competed at the 2012 Summer Olympics in London, England, which was held from 27 July to 12 August 2012. The country's participation at London marked its fifth appearance in the Summer Olympics since its début at the 1996 Summer Olympics. The delegation included two track and field athletes: Maoulida Darouèche and Feta Ahamada, and one swimmer, Ayouba Ali Sihame, all three qualified for the Games through wildcard places. Ahamada was selected as the flag bearer for the opening ceremony and Darouèche held it at the closing ceremony. Ahamada won her heat in the preliminary round of the women's 100 metres but was eliminated in the heat stages, while Darouèche and Sihame did not advance beyond the first round of their respective events.
Thomas Stachewicz is a former freestyle and backstroke swimmer, who represented Australia at three Summer Olympics.
Pernille Blume is a Danish swimmer who competed at the 2012 Summer Olympics and was the 2016 Summer Olympic champion in women's 50 m freestyle.
Emma McKeon, is an Australian competitive swimmer. McKeon has won four medals, including one gold, at the 2016 Summer Olympics in Rio de Janeiro, eleven medals, including one gold, at the World Aquatics Championships; and twelve medals, including eight gold, at the 2014 Glasgow and 2018 Gold Coast Commonwealth Games.
