# Swimming at the 2024 World Aquatics Championships – Men's 50 metre breaststroke

The Men's 50 metre breaststroke competition at the 2024 World Aquatics Championships was held on 13 and 14 February 2024.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Adam Peaty (GBR) | 25.95 | Budapest, Hungary | 25 July 2017 |
| Competition record | Adam Peaty (GBR) | 25.95 | Budapest, Hungary | 25 July 2017 |

## Results
### Heats

The heats were held on 13 February at 09:32.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 4 | Nic Fink | United States | 26.66 | Q |
| 1 | 6 | 6 | Ilya Shymanovich | Neutral Independent Athletes | 26.66 | Q |
| 3 | 6 | 4 | Sam Williamson | Australia | 26.69 | Q |
| 4 | 4 | 4 | Nicolò Martinenghi | Italy | 26.75 | Q |
| 5 | 4 | 6 | Peter John Stevens | Slovenia | 26.79 | Q |
| 6 | 4 | 5 | Melvin Imoudu | Germany | 26.91 | Q |
| 7 | 6 | 3 | Michael Andrew | United States | 26.94 | Q |
| 8 | 6 | 5 | Simone Cerasuolo | Italy | 27.00 | Q |
| 9 | 6 | 7 | Denis Petrashov | Kyrgyzstan | 27.10 | Q |
| 10 | 5 | 6 | Caspar Corbeau | Netherlands | 27.11 | Q |
| 11 | 4 | 3 | Mikel Schreuders | Aruba | 27.18 | Q |
| 12 | 5 | 5 | Adam Peaty | Great Britain | 27.23 | Q |
| 13 | 5 | 3 | Lucas Matzerath | Germany | 27.40 | Q |
| 14 | 6 | 2 | Bernhard Reitshammer | Austria | 27.47 | Q |
| 15 | 5 | 8 | Jan Kałusowski | Poland | 27.50 | Q |
| 16 | 4 | 2 | Arkadios Aspougalis | Greece | 27.62 | Q |
| 17 | 5 | 2 | Emre Sakçı | Turkey | 27.69 | |
| 18 | 6 | 8 | Darragh Greene | Ireland | 27.76 | |
| 19 | 4 | 9 | Ronan Wantenaar | Namibia | 27.81 | NR |
| 20 | 6 | 1 | Miguel de Lara | Mexico | 27.89 | |
| 21 | 4 | 8 | Nicholas Lia | Norway | 27.97 | |
| 22 | 4 | 1 | James Dergousoff | Canada | 28.08 | |
| 23 | 5 | 7 | Tonislav Sabev | Bulgaria | 28.13 | |
| 23 | 6 | 9 | Chao Man Hou | Macau | 28.13 | |
| 25 | 6 | 0 | Olli Kokko | Finland | 28.17 | |
| 26 | 5 | 9 | Uroš Živanović | Serbia | 28.27 | |
| 27 | 3 | 3 | Jadon Wuilliez | Antigua and Barbuda | 28.35 | |
| 28 | 3 | 5 | Likhith Selvaraj | India | 28.38 | |
| 28 | 5 | 0 | Jorge Murillo | Colombia | 28.38 | |
| 30 | 3 | 0 | Alexandre Grand'Pierre | Haiti | 28.39 | |
| 31 | 5 | 1 | Andrius Šidlauskas | Lithuania | 28.47 | |
| 32 | 3 | 2 | Arsen Kozhakhmetov | Kazakhstan | 28.59 | |
| 33 | 3 | 1 | Adrian Robinson | Botswana | 28.60 | |
| 34 | 2 | 6 | Abdul Aziz Al-Obaidly | Qatar | 28.62 | |
| 34 | 4 | 0 | Maksym Ovchinnikov | Ukraine | 28.62 | |
| 36 | 2 | 4 | Patrick Pelegrina | Andorra | 28.68 | |
| 37 | 3 | 4 | Muhammad Raharjo | Indonesia | 28.75 | |
| 37 | 3 | 6 | Panayiotis Panaretos | Cyprus | 28.75 | |
| 39 | 3 | 8 | Amro Al-Wir | Jordan | 28.81 | |
| 40 | 3 | 7 | Wu Chun-feng | Chinese Taipei | 28.86 | |
| 41 | 2 | 3 | Matthew Lawrence | Mozambique | 29.01 | |
| 42 | 3 | 9 | Jonathan Raharvel | Madagascar | 29.02 | |
| 43 | 2 | 5 | Tasi Limtiaco | Micronesia | 29.06 | |
| 44 | 2 | 2 | Ashot Chakhoyan | Armenia | 29.38 | |
| 45 | 2 | 7 | Jayden Loran | Curaçao | 29.78 | |
| 46 | 1 | 0 | Rashed Al-Tarmoom | Kuwait | 29.95 | |
| 47 | 2 | 1 | Omar Al-Hammadi | United Arab Emirates | 31.16 | |
| 48 | 2 | 0 | Chadd Ng | Eswatini | 31.53 | |
| 49 | 1 | 6 | Fahim Anwari | Afghanistan | 31.83 | |
| 50 | 1 | 4 | Ghaith Hussein | Iraq | 31.95 | |
| 51 | 2 | 8 | Sébastien Kouma | Mali | 31.99 | |
| 52 | 1 | 8 | Mubal Azzam Ibrahim | Maldives | 33.24 | NR |
| 53 | 2 | 9 | Jion Hosei | Palau | 33.61 | |
| 54 | 1 | 5 | Ethan Alimanya | Tanzania | 34.26 | |
| 55 | 1 | 9 | Pap Jonga | Gambia | 35.01 | |
| 56 | 1 | 2 | Yves Munyu | DR Congo | 35.62 | |
| 57 | 1 | 7 | Refiloe Chopho | Lesotho | 38.00 | |
| | 4 | 7 | Choi Dong-yeol | South Korea | Disqualified | Disqualified |
| | 1 | 1 | Higinio Ndong | Equatorial Guinea | Did not start | Did not start |
| | 1 | 3 | Ibrahim Kamara | Sierra Leone | Did not start | Did not start |

### Semifinals

The semifinals were held on 13 February at 19:34.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 5 | Sam Williamson | Australia | 26.41 | Q, OC |
| 2 | 1 | 5 | Nicolò Martinenghi | Italy | 26.65 | Q |
| 3 | 2 | 4 | Nic Fink | United States | 26.77 | Q |
| 4 | 1 | 7 | Adam Peaty | Great Britain | 26.85 | Q |
| 5 | 1 | 6 | Simone Cerasuolo | Italy | 26.98 | Q |
| 6 | 2 | 1 | Lucas Matzerath | Germany | 27.01 | Q |
| 7 | 2 | 3 | Peter John Stevens | Slovenia | 27.04 | Q |
| 8 | 2 | 7 | Mikel Schreuders | Aruba | 27.05 | Q |
| 9 | 1 | 3 | Melvin Imoudu | Germany | 27.06 | |
| 10 | 1 | 4 | Ilya Shymanovich | Neutral Independent Athletes | 27.07 | |
| 11 | 1 | 8 | Arkadios Aspougalis | Greece | 27.18 | |
| 11 | 2 | 6 | Michael Andrew | United States | 27.18 | |
| 13 | 2 | 2 | Denis Petrashov | Kyrgyzstan | 27.20 | |
| 14 | 1 | 1 | Bernhard Reitshammer | Austria | 27.25 | |
| 15 | 1 | 2 | Caspar Corbeau | Netherlands | 27.30 | |
| 16 | 2 | 8 | Jan Kałusowski | Poland | 27.38 | |

### Final

The final was started on 14 February at 20:01.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Sam Williamson | Australia | 26.32 | OC |
| | 5 | Nicolò Martinenghi | Italy | 26.39 | |
| | 3 | Nic Fink | United States | 26.49 | |
| 4 | 6 | Adam Peaty | Great Britain | 26.77 | |
| 5 | 7 | Lucas Matzerath | Germany | 26.80 | |
| 6 | 2 | Simone Cerasuolo | Italy | 26.93 | |
| 7 | 8 | Mikel Schreuders | Aruba | 26.97 | |
| 8 | 1 | Peter John Stevens | Slovenia | 27.07 | |