Inge Sørensen, later Inge Tabur, sometimes known as "Lille henrivende Inge" was a Danish swimmer who at age 12 won a bronze medal in the 200 meter breaststroke at the 1936 Summer Olympics in Berlin. This makes her the youngest Olympic medal winner in an individual competition.
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.
Sarah Poewe is an Olympic breaststroke swimmer who has competed internationally for both South Africa and Germany.
Rikke Møller Pedersen is a Danish competitive swimmer specialising in breaststroke and from 2013 to 2021 world record holder in the 200 m breaststroke (2:19.11).
Kayla Clarke is an Indigenous Australian swimmer who represented Australia at the 2012 Summer Paralympics in swimming, and has medalled at the 2010 Australian Disability Age Group Nationals, and 2010 International Paralympic Swimming World Championships, 2009 Queensland State Championships, 2009 Queensland Secondary School Titles, and 2009 Global Games. She competes in a number of events, including the 100m freestyle, 100m backstroke, 100m breaststroke, 100m butterfly and 200m individual medley.
Anna Sztankovics is a Hungarian swimmer, who specializes in the breaststroke events. She is the current holder of the Hungarian record in the 50m breaststroke event both in long course and in short course.
Karolina Pelendritou is a visually impaired swimmer from Cyprus. She has won gold medals and broken records in national and international games as well as winning three gold medals, a silver and two bronze over four Paralympic Games. Due to her achievements she is known as the "Princess of the Pool".
Charlotte Sarah Henshaw is a British Paralympic full-time athlete across multiple disciplines. Originally a swimmer, she changed to canoeing from 2017, becoming the reigning World champion in the KL2 (five-time) and VL3 (three-time) 200m events. In September 2021, at the delayed 2020 Summer Paralympics in Tokyo, she became a Paralympic champion at her fourth games, winning the Women's KL2 event.
Katalin Bor is a Hungarian swimmer, who specialized in breaststroke events. She represented her nation Hungary at the 2008 Summer Olympics, and has won a career total of two medals in a major international competition, spanning the 2006 European Junior Swimming Championships in Palma de Mallorca, Spain.
Viktoria Zeynep Güneş is a Ukraine-born Turkish swimmer. She currently represents Energy Standard in the International Swimming League.
Sydney Pickrem is a Canadian competitive swimmer who competed for Texas A&M University in College Station. A three-time Olympian, she placed sixth in the 200m individual medley at the 2016 Summer Olympics and won a bronze medal at the 2020 Summer Olympics as part of the Canadian 4×100 metre medley relay team. At the 2024 Paris Olympics, she participated in the women’s 200-meter individual medley and the 200-meter breaststroke, but finished out of medal contention. Accomplished in international competition, she is a seven-time World Aquatics Championships medallist.
Mona McSharry is an Irish competitive swimmer. She is a two-time Olympian and won the bronze medal in the 100 metre breaststroke at the 2024 Summer Olympics. McSharry is also a World Championships (25m) and European Short Course Championships bronze medalist, a junior world champion and a two-time junior European champion.
Kaylene Corbett is a South African swimmer. She competed in the women's 100 metre breaststroke event at the 2017 World Aquatics Championships. At the 2022 Commonwealth Games, she won the bronze medal in the 200 metre breaststroke.
Csilla Bartos-Cserepy is a retired professional tennis who represented Hungary and Switzerland.
Anastasia "Nastiya" Gorbenko is an Israeli competitive swimmer. She competes in the backstroke, breaststroke, freestyle, and medley. She has won 8 World and European championships gold medals, competed at 2 Olympic finals, broken most of the Israeli national records for women and mixed relays, and is considered to be Israel's greatest swimmer of all time. In February 2024, Gorbenko won a silver medal at the Doha World Championships in the women's 400 meters individual medley. Gorbenko represented Israel at the 2024 Summer Olympics in swimming in the 100m backstroke, 200m backstroke, 100m breaststroke, 200m individual medley, 400m individual medley, 4x200m freestyle relay, and mixed 4x100m medley relay.
Lea Polonsky is an Israeli swimmer. At the 2017 European Youth Olympics she won silver medals in the 200m Medley and the mixed 4×100m Medley Relay. At the 2019 European Junior Swimming Championships she won a bronze medal in the 200 IM, and at the 2024 European Aquatics Championships she won a gold medal in the 4×200m freestyle relay, and the silver medal in the 200m medley. Polonsky represented Israel at the 2024 Paris Olympics in the Women's 200 metre freestyle, the 200 metre individual medley, and the 4×200 metre freestyle relay.
Alba Vázquez Ruiz is a Spanish swimmer. She won the bronze medal in the 400 metre individual medley at the 2022 Mediterranean Games. At the 2019 European Junior Championships she won a gold medal in the 400 metre individual medley. She won the gold medal in the 400 metre individual medley and the silver medal in the 200 metre individual medley at the 2019 World Junior Championships. She is a former world junior record holder in the 400 metre individual medley.
Nika Godun is a Russian competitive swimmer. She is a Russian record holder in the short course 4×50 metre medley relay and the 4×100 metre medley relay. She competed at the 2019 and 2021 European Short Course Championships, medaling in the 4×50 metre medley relay and 50 metre breaststroke. At the 2021 World Short Course Championships she placed fifth in the 50 metre breaststroke and the 4×100 metre medley relay, and sixth in the 100 metre breaststroke and the 4×50 metre medley relay.
Kayla van der Merwe is a British competitive swimmer. At the 2019 World Junior Championships, she won the silver medal in the 50 metre breaststroke and the bronze medal in the 100 metre breaststroke. She won the gold medal in the 100 metre breaststroke and bronze medals in the 200 metre breaststroke and 4×100 metre medley relay at the 2019 European Junior Championships.
Princess Viktória of Bourbon-Parma, Countess of Bardi, Countess of Montizòn is a Hungarian-Dutch lawyer, philanthropist, and corporate strategic manager. Through her marriage to Prince Jaime of Bourbon-Parma, the son of Princess Irene of the Netherlands and Carlos Hugo, Duke of Parma, she is a member of the House of Bourbon-Parma and the Dutch royal family. She is the Countess of Montizòn in her own right, having been bestowed with the title by her brother-in-law Prince Carlos, Duke of Parma, in 2013. Per a 1996 royal decree issued by Queen Beatrix, she is entitled to the style and title Her Royal HighnessPrincess Viktória de Bourbon de Parme in The Netherlands as a member of the extended royal family.
Hungary 
