Vladislav Vitalyevich Polyakov is a Kazakhstani swimmer, who specialized in breaststroke events. He swam for his native Kazakhstan at three Olympic Games, and eventually finished fifth in both 100 and 200 m breaststroke at his official Olympic debut in Athens. In total, he has won eight medals in major international tournaments, including his first career gold from the 2006 FINA World Short Course Championships in Shanghai, China. While residing in the United States, Polyakov is a five-time SEC champion, a double NCAA titleholder, and a two-time gold medalist at the national championships. He also earned a total of twelve All-American titles while playing for the Alabama Crimson Tide from 2003 to 2007.
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.
Jessica Adele Hardy Meichtry is an American competitive swimmer who specializes in breaststroke and freestyle events. Hardy earned a bronze medal in the 4×100-meter freestyle and a gold medal in the 4×100-meter medley relays at the 2012 Summer Olympics.
Cameron van der Burgh OIS is a retired South African competitive swimmer and hedge fund analyst. He is Africa's first home-trained world record holder and individual male Olympic champion. He is married to longtime partner Nefeli Valakelis.
Zoë Baker is a former world record holder in swimming who represented Great Britain until 2005, when she switched allegiance to New Zealand whilst living there. She later returned to the United Kingdom and she switched her allegiance back to Great Britain in 2011.
Felipe Alves França da Silva is a Brazilian breaststroke swimmer, who competed for his country in three Olympic Games.
Giedrius Titenis is a Lithuanian swimmer, who specialized in breaststroke events. He is a four-time Olympian, a multiple-time Lithuanian record holder in the men's breaststroke, and a double swimming champion in the same discipline at the 2011 Summer Universiade in Shenzhen, China. Titenis is also a member of Anykščiai Swimming Club, and is coached and trained by Žilvinas Ovsiukas.
Robert "Bobby" Hurley is an Australian swimmer and former World Record holder in the short-course 50 metres Backstroke and 2012 World Champion in the same event. In 2009 he won a bronze medal as a team member on the 4 × 200 m Freestyle relay at the FINA World Championships in Rome. He has five FINA World Championship medals to his name, two gold, one silver and two bronze.
The swimming competitions at the 2012 Summer Olympics in London took place from 28 July to 4 August at the Aquatics Centre. The open-water competition took place from 9 to 10 August in Hyde Park.
The men's 100 metre breaststroke event at the 2012 Summer Olympics took place on 28–29 July at the London Aquatics Centre in London, United Kingdom.
Felipe Ferreira Lima is a Brazilian swimmer. He has six medals in World Championships: two in long course, and four in short course, highlighting his bronze medal in the 100 metre breaststroke at the 2013 World Championships. At the 2012 Summer Olympics, he competed in the men's 100 metre breaststroke, finishing in 8th place in his semi-final and failing to reach the final.
The men's 100 metre breaststroke event in swimming at the 2013 World Aquatics Championships took place on 28–29 July at the Palau Sant Jordi in Barcelona, Spain.
Ross Murdoch is a Scottish competitive swimmer who has represented Great Britain at the Summer Olympics in 2016 and 2020, the FINA World Championships and the LEN European Championships, and Scotland at the Commonwealth Games from 2014 to the present. Between 2014 and 2016, Murdoch became a World, European and Commonwealth champion.
Adam George Peaty is an English competitive swimmer who specialises in the breaststroke. He won the gold medal in the 100 metre breaststroke at the 2016 Summer Olympics, the first by a male British swimmer in 24 years, and retained the title at the 2020 Summer Olympics in 2021, the first British swimmer ever to retain an Olympic title. He is also an eight-time World Champion, a sixteen-time European Champion and a four-time Commonwealth Champion. According to FINA itself, Peaty is widely regarded as the dominant breaststroke swimmer of his era, and the most dominant sprint breaststroke swimmer of all time.
The men's 100 metre breaststroke event at the 2016 Summer Olympics took place between 6–7 August at the Olympic Aquatics Stadium.
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.
Nicolò Martinenghi is an Italian swimmer. He is a two-time world record holder in the 4×50 metre medley relay, swimming breaststroke on both relays. He is the Italian record holder in the 50 metre breaststroke and 100 metre breaststroke.
Kirill Strelnikov is a Russian competitive swimmer. He won a gold medal in the 4×50 metre medley relay at the 2021 World Short Course Championships and the 4×100 metre medley relay at the 2013 World University Games, swimming the breaststroke leg of both relays in the final. At the 2021 European Short Course Championships he won a bronze medal in the 4×50 metre mixed medley relay, swimming the breaststroke leg of the relay in the preliminaries.
Lara van Niekerk is a South African competitive swimmer. She is the current African, Commonwealth, and South African record holder in the long course 50-metre breaststroke and the African and South African record holder in the short course 50-metre breaststroke. She won gold medals in the 50-metre breaststroke at the 2018 African Swimming Championships and the 2022 Commonwealth Games as well as a silver medal at the 2022 World Short Course Championships and the bronze medal at the 2022 World Aquatics Championships in the same event. In the 100-metre breaststroke, she won gold medals at the 2018 African Swimming Championships and the 2022 Commonwealth Games.
South Africa 
