Kieren John Perkins, OAM is a former Australian freestyle swimmer. He specialised in the 1500-metre freestyle and won successive Olympic gold medals in this event in the 1990s. He won his first at the 1992 Olympics which he won in world record time and then at the 1996 Olympics when he defended his title. In total he won four Olympic medals.
Laure Manaudou is a retired French Olympic, world and European champion swimmer. She has held the world record in freestyle events between 200 and 1500 meter. She is the daughter of a French father and a Dutch mother, and she is the older sister of Florent Manaudou who is also an Olympic gold medalist swimmer.
Federica Pellegrini is an Italian retired swimmer. A native of Mirano, in the province of Venice, she won a gold medal at the 2008 Beijing Olympics. At the 2009 World Championships in Rome, Pellegrini became the first woman ever to break the 4-minute barrier in the 400 m freestyle with a time of 3:59.15. She also held the women's 200 meters freestyle world record.
Grant George Hackett OAM is an Australian swimmer, most famous for winning the men's 1500 metres freestyle race at both the 2000 Summer Olympics in Sydney and the 2004 Summer Olympics in Athens. This achievement has led him to be regarded as one of the greatest distance swimmers in history. He also collected a gold medal in Sydney for swimming in the heats of the 4 × 200 m freestyle relay. He was well regarded for his versatility, and has held the long course world records in the 200 m, 800 m, and 1500 m freestyle events. He dominated the 1500 m event for a decade, being undefeated in the event in finals from 1996 until the 2007 World Aquatics Championships. In total, he won 10 long-course world championship gold medals.
Novella Calligaris is a retired Italian swimmer, and the first Italian to win an Olympic medal in swimming. Her elder brother Mauro Calligaris was also an Olympic swimmer.
Claes Arne Borg was a Swedish swimmer. He is best known for breaking 32 world records and winning five Olympic medals in the 1920s. In 1926 Borg won the Svenska Dagbladet Gold Medal, shared with Edvin Wide. Next year, at the 1927 European Championships, he set a new world record in the 1500 m at 19:07.2 which stood for nearly 11 years. Besides swimming, Borg also won a European silver medal in water polo in 1926. His twin brother Åke was also an Olympic medalist in swimming.
Helene Emma Madison was an American competition swimmer, Olympic champion, and former world record-holder.
Giorgio Lamberti is an Italian former swimmer. In 1991 he became the first swimmer of Italy to win a world title, and gold medal, at a FINA World Aquatics Championships. He formerly held world records in the short course and long course 200 metre freestyle as well as in the short course 400 metre freestyle.
Tracey Lee Wickham is an Australian former middle distance swimmer. Wickham was the World Champion for the 400 m and 800 m freestyle in 1978, and won gold in both events at the 1978 and 1982 Commonwealth Games. She is a former world record holder for the 400 m, 800 m and 1500 m freestyle. Despite her success in the pool, Wickham has battled hardship and personal tragedy throughout her life.
Karen Lynne Moras, also known by her married name Karen Stephenson, is an Australian distance freestyle swimmer of the 1960s and 1970s who won a bronze medal in the 400-metre freestyle at the 1968 Summer Olympics. Although she set multiple world records she peaked between Olympics and was unable to capture gold at Olympic level.
Alessia Filippi is a retired Italian swimmer.
Keena Ruth Rothhammer is an American former competition swimmer, Olympic champion, and former world record-holder in two events.
Shozo Makino was a Japanese Olympic swimmer. He won a silver medal for the Men's 1500 meter freestyle event in the 1932 Summer Olympics in Los Angeles, and a bronze medal for the Men’s 400 meter freestyle event in the 1936 Summer Olympics in Berlin.
Mireia Belmonte García is a Spanish Olympic, world, and European champion swimmer. She is the world record holder in the short course 200 metre butterfly and 400 metre individual medley. Formerly, she held the world record in the short course 400 metre freestyle, 800 metre freestyle, and 1500 metre freestyle. She was the first Spanish woman to win a gold medal in swimming at an Olympic Games and is widely considered to be the greatest Spanish swimmer of all time.
Kylie Jayne Palmer, OAM, is an Australian distance freestyle swimmer.
Timothy Andrew Shaw is an American former Olympic medal-winning swimmer and water polo player. He swam at the 1976 Summer Olympics and played on the American team at the 1984 Summer Olympics. He is one of a handful of athletes to win Olympic medals in two different sports. Between 1974 and 1984, Shaw won two Olympic silver medals; three world championships; seven U.S. Amateur Athletic Union national titles; and three U.S. National Collegiate Athletic Association championships.
Joanne Amy Jackson is an English freestyle swimmer. She is the sister of retired Olympic swimmer Nicola Jackson. She was born in Northallerton and went to Richmond School, North Yorkshire.
Pál Joensen is a Faroese elite swimmer. He was born in Vágur, Suðuroy, Faroe Islands. He has won World and European Championship medals. His bronze medal in the men's 1500 metre freestyle at the 2012 FINA World Swimming Championships in Istanbul was the first medal won by a Faroese swimmer at the World Aquatic Championships.
Kimberly Ann Linehan is an American former competition swimmer, world champion, and former world record-holder.
Simona Quadarella is an Italian swimmer. She specializes in long distance freestyle events. At the 2020 Summer Olympics, she won a bronze medal in Women's 800 metre freestyle, and at the 2019 World Championships in Gwangju, won the gold medal in the 1500 m freestyle, and the silver medal in the 800 m freestyle.
Italy 
