Jose Guilherme Couto is a Portuguese swimmer. He competed at the 1996 Summer Olympics, the 2000 Summer Olympics, and the 2004 Summer Olympics.
Felipe Alves França da Silva is a Brazilian breaststroke swimmer, who competed for his country in three Olympic Games.
Fabio Scozzoli is an Italian swimmer. At the 2012 World Short Course Championships, he won the gold medal in the 100 metre breaststroke. He is the 2022 Mediterranean champion in the 50 metre breaststroke.
Rūta Meilutytė is a Lithuanian swimmer. An Olympic gold medalist, she is a world record holder in the short course 50 metre breaststroke, 100 metre breaststroke and long course 50 metre breaststroke. She is a former world record holder in the long course 100 metre breaststroke.
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).
I Gede Siman Sudartawa is an Indonesian swimmer. He specializes in backstroke. In the 2011 SEA Games, he won four gold medals and set 2 SEA Games' records.
Nicolas Fink is an American competitive swimmer. He is a five-time world champion in breaststroke events. He is a world record holder in the short course 4×100 meter medley relay and 4×50 meter mixed medley relay. He is the Americas record holder in the short course 50 meter breaststroke, 100 meter breaststroke, and 200 meter breaststroke as well as the American record holder in the long course 50 meter breaststroke. In the 50 meter breaststroke, he won the World Short Course titles in 2021 and 2022 and World Long Course title in 2022. In the 100 meter breaststroke, he is the 2022 World Short Course gold medalist. In the 200 meter breaststroke, he is the 2021 World Short Course gold medalist.
The Men's 100 metre breaststroke event at the 2013 SEA Games took place on 13 December 2013 at Wunna Theikdi Aquatics Centre.
Benjamin Proud is an English competitive swimmer, representing Great Britain at the Olympic Games, the FINA World Aquatics Championships and LEN European Aquatics Championships, and England at the Commonwealth Games. Proud specialises in sprint freestyle and butterfly races, specifically the 50-metre distance in both. He is the 2022 World Champion in the 50 metre freestyle, his second long course world title. He is the 2017 world champion in the 50-metre butterfly. He is only the third male swimmer to be simultaneously short-course and long-course World Champion at 50 metre freestyle, after César Cielo and Florent Manaudou.
Anton Mikhailovich Chupkov is a Russian competitive swimmer. He is the European record holder in the long course 200 metre breaststroke and the Russian record holder in the long course 100 metre breaststroke. He formerly held the world record in the long course 200 metre breaststroke. At the 2015 European Games he won four gold medals in individual and relay events. He won the bronze medal in the 200 metre breaststroke at the 2016 Summer Olympics. He won the gold medal in the 200 metre breaststroke at the 2017 and 2019 World Aquatics Championships.
Evgeny Mikhailovich Rylov is a Russian competitive swimmer and Olympic champion specializing in backstroke events. He won three gold medals at the 2014 Summer Youth Olympics in Nanjing, and a bronze medal at his senior international debut at the 2015 World Championships in Kazan. He also won a bronze medal at the 2016 Summer Olympics in Rio de Janeiro and a gold medal at the 2017 World Championships in Budapest, both were in the 200 metre backstroke event. In 2018, at the 2018 World Short Course Championships, he won gold medals in the 200 metre backstroke and 50 metre backstroke. At the 2019 World Championships, he won a gold medal in the 200 metre backstroke, silver medal in the 100 metre backstroke, and silver medal in the 50 metre backstroke. He won the gold medal in the 100 metre backstroke and 200 metre backstroke at the 2020 Summer Olympics in Tokyo.
Kyle Abeysinghe is a Sri Lankan national swimmer who has represented his country at several international competitions. At the domestic level, Abeysinghe holds numerous national records, has been national champion several times, and is a member of the Killer Whale Aquatic Club, under his coach and father, Manoj Abeysinghe. At the 2017 Youth Commonwealth Games in Nassau, Bahamas, Abeysinghe won two silver medals in the 50m and the 100m Freetyle, becoming the only Sri Lankan in swimming to achieve this feat.
Kristóf Milák is a Hungarian swimmer. He is the current holder of the world record in the long course 200 metre butterfly and the European record in the long course 100 metre butterfly. He also currently holds the Hungarian record in the short course 50 metre backstroke. At his first Olympic Games, the 2020 Summer Olympics, he won a gold medal in the 200 metre butterfly and a silver medal in the 100 metre butterfly. He has also won three gold medals and one silver at the World Aquatic Championships, as well as three gold medals at the European Aquatics Championships. He was the gold medalist in the 400 metre freestyle, 200 metre freestyle, and 200 metre butterfly events at the 2018 Summer Youth Olympics.
Ilya Syarheyevich Shymanovich is a Belarusian swimmer. He is the world record holder in the short course 100 metre breaststroke and a former world record holder in the short course 50 metre breaststroke. At the 2018 World Championships he won two silver medals, one each in the 100 metre breaststroke and the 50 metre breaststroke. He won two gold medals, one in the 50 metre breaststroke and one in the 200 metre breaststroke, and a silver medal, in the 100 metre breaststroke, at the 2021 European Short Course Championships. At the 2021 World Short Course Championships he won the gold medal in the 100 metre breaststroke.
James Wilby is a British competitive swimmer who specialises in the breaststroke. Wilby is the 2018 Commonwealth Games champion in 200 metre breaststroke, the 2022 Commonwealth Games champion in 100 metre breaststroke, and the 2022 European champion in 200 metre breaststroke. He formed part of the Great Britain team that won World Championship gold in the men's 4 x 100 metre medley relay in 2019, and the England team that won the Commonwealth Games Men's 4 x 100 metre medley relay in 2014 and 2022.
Qin Haiyang is a Chinese swimmer who specializes in the breaststroke and individual medley. He is the current world record holder in the 200m breaststroke. At the 2023 World Aquatics Championships, Qin became the first swimmer in history to win all three breaststroke events at a single edition of the championships. Qin was also the former world junior record holder in the 200m breaststroke and 200m individual medley. In 2023, Qin became the first Asian swimmer to be named as the Male Swimmer of the Year by World Aquatics. In the same year, Qin was also announced as the 'most valuable player' of the 2022 Asian Games.
Edgar Xavier Marvelo is a wushu taolu athlete from Indonesia. He is a three-time world champion as well as a medalist at the Asian Games and the SEA Games.
Vladislav Gerasimenko is a Russian competitive swimmer. He is a world junior record holder in the long course 4×100 metre medley relay, swimming a 59.53 for the breaststroke portion of the relay. He is a four-time medalist at the 2018 Summer Youth Olympics and a five-time medalist at the World Junior Swimming Championships, spanning breaststroke and freestyle disciplines. He competed at the 2021 European Short Course Swimming Championships, placing sixteenth in the preliminaries of the 50 metre breaststroke.
Jendi Pangabean is an Indonesian Paralympic swimmer who represented Indonesia at the 2020 Summer Paralympics. He won gold medal at the 2018 Asian Para Games in Jakarta and 2022 Asian Para Games in Hangzhou.
Indonesia 
