Oussama "Ous" Mellouli is a Tunisian swimmer who competes in the freestyle and medley events. He is a three-time Olympic medalist, is an African record holder, and trains with the USC Trojans team based at the University of Southern California, where he studied as a computer science undergraduate and swam collegiately.
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.
Yuliya Andreyevna Yefimova is a Russian competitive swimmer. She is the Russian record holder in the 200 metre individual medley, 50 metre breaststroke, 100 metre breaststroke, and 200 metre breaststroke. After making her Olympic debut in 2008, she went on to win the bronze medal in the 200 metre breaststroke in 2012, and silver medals in the 100 metre and 200 metre breaststroke in 2016. She is a six-time World Champion, winning the 50 metre breaststroke in 2009 and 2013, the 100 metre breaststroke in 2015, and the 200 metre breaststroke in 2013, 2017, and 2019. In 2019, she became the first woman to win the 200 metre breaststroke at a FINA World Aquatics Championships three times. She is a former world record holder in the long course 50 metre breaststroke. She has won 109 medals, including 48 gold medals, at Swimming World Cups.
Margaret Josephine Hoelzer is an American former competition swimmer, Olympic medalist, and former world record-holder. Hoelzer competed in the 2004 Summer Olympics and the 2008 Olympic Games.
Lauren Marie Boyle is a former competitive swimmer from New Zealand. She has competed at three Commonwealth Games and three Olympic Games.
Katinka Hosszú is a Hungarian competitive swimmer specialized in individual medley events. She is a three-time Olympic champion and a nine-time long-course world champion. She is the owner of a Budapest-based swim school and swim club called Iron Swim Budapest, and a co-owner and captain of Team Iron, founding member of the International Swimming League.
Haley Danita Anderson is an American competitive swimmer who is an Olympic silver medalist. She placed second in the 10-kilometer open water event at the 2012 Summer Olympics.
Andrew Douglas Gemmell is an American competition swimmer who specialized in long-distance freestyle events. He swam for the University of Georgia, helping then to place 5th in the NCAA in 2014, and was a member of the 2012 United States Olympic Team, where he competed in the 1,500-meter freestyle event at the 2012 Summer Olympics in London. At the Olympics, he finished ninth with a time of 14:59:05, missing the semi-finals by one place. He took several distance swimming medals, with a gold at the 5 km team event in the 2011 World Aquatics Championships in Shanghai, and took medals at the Pan Pacific Championships in 2014 and the Pan American Games in 2015 in the 1500 m, 5 km and 10 km events.
Gregorio Paltrinieri is an Italian competitive swimmer. He is a former world record holder in the short course 1500 metre freestyle. He holds the European record in the long course 800 metre and 1500 metre freestyle events with times of 7:39.27 and 14:32.80, respectively. In the 1500 metre freestyle, he is a 2016 Olympic, three-time world long course, two-time world short course, three-time European long course, and three-time European short course champion. In the 800 metre freestyle, he is a 2019 world long course, 2022 world short course, three-time European long course, and 2021 European short course champion. In the 10 kilometre open water swim, he is a 2022 world and 2020 European champion. In the 5 kilometre open water swim, he is a two-time European champion.
Kathleen Genevieve Ledecky is an American competitive swimmer. She has won nine Olympic gold medals and 21 world championship gold medals, the most in history for a female swimmer. With 14 medals and 9 gold medals, she is also the most decorated American woman, most decorated female swimmer, the female with the most gold medals and fifth-most decorated athlete in Olympic history. She has won a record 16 individual gold medals at the World Aquatics Championships. Ledecky's eight individual medals at the Olympics and 26 overall medals at the World Aquatics Championships are records in women's swimming. Ledecky is the world record holder in the women's 800- and 1500-meter freestyle, as well as the former world record holder in the women's 400-meter freestyle. She also holds the fastest-ever times in the women's 500-, 1000-, and 1650-yard freestyle events. She is widely regarded as the greatest female swimmer of all time and one of the greatest Olympians of all time.
Ashley Grace Twichell is an American competition swimmer who specializes in long-distance freestyle and open-water events. She placed seventh in the 10 kilometer open water swim at the 2020 Summer Olympics. Twichell's age at her Olympic Games debut, 32 years of age, made her the oldest American swimmer first-timer at an Olympic Games since 1908.
Hali Flickinger is a retired American swimmer who specializes in freestyle, butterfly, and individual medley events. She represents the Cali Condors of the International Swimming League.
Abbigail "Abbey" Weitzeil is an American competition swimmer specializing in sprint freestyle. A multiple time Olympic medalist, she won a gold medal in the 4x100-meter medley relay for swimming in the preliminary heats and a silver medal in the 4x100-meter freestyle relay at the 2016 Rio Olympics. At the 2020 Summer Olympics she won a silver medal in the 4x100-meter medley relay and a bronze medal in the 4x100-meter freestyle relay, swimming in the final of both events. She is the American record holder in the 50-yard freestyle and is part of the American Record in the 4x100-meter freestyle relay.
Jordan Matthew Wilimovsky is an American competitive swimmer who specializes in open water swimming. At the 2015 World Championships in Kazan, Russia, Wilimovsky won the gold medal in the 10 km open water event. Wilimovsky won by a margin of 12.1 seconds over the second-place finisher Ferry Weertman of the Netherlands. At the 2016 Summer Olympics, Wilimovsky competed in both pool swimming and open water swimming events, becoming the first American to swim in both types of events at one Olympic Games.
Kathleen Baker is an American competition swimmer who specializes in freestyle and backstroke events. At the 2016 Summer Olympics, she won a gold medal in the 4x100-meter medley relay and a silver medal in the individual 100-meter backstroke. She is the former world-record holder in 100 meter backstroke, set on July 28, 2018, in 58.00 at the William Woollett Jr. Aquatics Center in Irvine, CA. Baker is also the former world-record holder in the 4x100 meter medley relay with Lilly King, Dana Vollmer, and Simone Manuel.
Keren Michaela Siebner, is an Israeli Olympic swimmer, Israeli national champion, Maccabiah Games winner, and a national record holder in the 200m butterfly and 200m backstroke.
Florian Wellbrock is a German swimmer. He is the world record holder in the short course 1500 metre freestyle. He is an Olympic champion, multiple World Champion and European champion, in both Long and Short Courses. At the 2020 Summer Olympics, he won gold in the 10 kilometre open water and bronze in the 1500 metre freestyle. In total, Wellbrock has won 28 medals at international competitions of which 20 are gold. This includes his gold medal at the Olympic games, six at the World Championships, six at the Swimming World Cup and six at the Open Water Swimming World Cup.
Robert Christian FinkeOLY, better known as Bobby Finke, is an American competitive swimmer. He won two gold medals for the United States in the 2020 Summer Olympics: the men's 800-meter and 1500-meter freestyle swims. Finke successfully defended his title in 1500 m freestyle at the 2024 Summer Olympics, setting the world record and added a silver medal in the 800 m freestyle. He swam for the University of Florida in Gainesville, Florida from 2018–2022 under Coach Anthony Nesty. He currently swims as part of the pro group at UF. Before swimming in college, Bobby swam for Coach Fred Lewis on the Saint Petersburg Aquatics club team, located in Saint Petersburg, Florida.
Kathryn Eileen Grimes is an American competitive swimmer. At the 2022 World Aquatics Championships, she won silver medals in the 1500 meter freestyle and the 400 meter individual medley. She placed fourth in the 800 meter freestyle at the 2020 Summer Olympics, where she was the youngest member of the US Olympic Team at 15 years of age.
Lani Pallister is an Australian competitive swimmer. She is a world record holder in two sports, with a world record in swimming, the short course 4×200-metre freestyle relay, and world records in life saving for the youth age group in the 100-metre rescue medley and 200-metre super lifesaver. She holds the Oceanian, Commonwealth, and Australian records in the short course 1500-metre freestyle and the Australian record in the short course 800-metre freestyle. She is the first female World Short Course champion in the 1500-metre freestyle, winning the inaugural event for women at the 2022 edition. Over the course of the 2022 World Short Course Championships, she won the gold medal in each of the four events she contested.
United States 
