# Swimming at the 2023 World Aquatics Championships – Men's 50 metre backstroke

The men's 50 metre backstroke competition at the 2023 World Aquatics Championships was held on 29 and 30 July 2023.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Hunter Armstrong (USA) | 23.71 | Greensboro, United States | 28 April 2022 |
| Competition record | Liam Tancock (GBR) | 24.04 | Rome, Italy | 2 August 2009 |

## Results
### Heats

The heats were started on 29 July at 10:55.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 4 | Justin Ress | United States | 24.18 | Q |
| 2 | 5 | 4 | Apostolos Christou | Greece | 24.48 | Q |
| 3 | 7 | 4 | Hunter Armstrong | United States | 24.49 | Q |
| 4 | 5 | 5 | Ksawery Masiuk | Poland | 24.71 | Q |
| 5 | 6 | 3 | Ole Braunschweig | Germany | 24.72 | Q |
| 6 | 7 | 3 | Xu Jiayu | China | 24.73 | Q |
| 6 | 7 | 5 | Isaac Cooper | Australia | 24.73 | Q |
| 8 | 6 | 5 | Thomas Ceccon | Italy | 24.80 | Q |
| 9 | 6 | 2 | Andrei-Mircea Anghel | Romania | 24.86 | Q |
| 10 | 5 | 7 | Kacper Stokowski | Poland | 24.91 | Q |
| 11 | 5 | 3 | Andrew Jeffcoat | New Zealand | 24.95 | Q |
| 11 | 6 | 7 | Conor Ferguson | Ireland | 24.95 | Q |
| 13 | 7 | 2 | Takeshi Kawamoto | Japan | 25.05 | Q |
| 14 | 4 | 5 | Yassin Hossam | Egypt | 25.07 | Q |
| 15 | 5 | 1 | Michael Laitarovsky | Israel | 25.10 | Q |
| 16 | 5 | 6 | Ryosuke Irie | Japan | 25.11 | Q |
| 17 | 6 | 9 | Lamar Taylor | Bahamas | 25.12 | |
| 18 | 6 | 0 | Adrian Santos | Spain | 25.15 | |
| 19 | 5 | 2 | Javier Acevedo | Canada | 25.18 | |
| 19 | 7 | 8 | Won Young-jun | South Korea | 25.18 | |
| 21 | 7 | 6 | Guilherme Basseto | Brazil | 25.22 | |
| 22 | 5 | 9 | João Costa | Portugal | 25.28 | NR |
| 23 | 7 | 1 | Wang Gukailai | China | 25.29 | |
| 24 | 7 | 7 | Tomáš Franta | Czech Republic | 25.35 | |
| 25 | 6 | 6 | Björn Seeliger | Sweden | 25.38 | |
| 26 | 6 | 8 | Hugo González | Spain | 25.42 | |
| 27 | 4 | 3 | Chuang Mu-lun | Chinese Taipei | 25.50 | |
| 28 | 7 | 9 | Srihari Nataraj | India | 25.51 | |
| 29 | 4 | 8 | Markus Lie | Norway | 25.55 | |
| 30 | 6 | 1 | Áron Székely | Hungary | 25.59 | |
| 31 | 7 | 0 | Roman Mityukov | Switzerland | 25.61 | |
| 32 | 4 | 4 | Quah Zheng Wen | Singapore | 25.76 | |
| 33 | 3 | 2 | Remi Fabiani | Luxembourg | 25.87 | |
| 33 | 5 | 0 | I Gede Siman Sudartawa | Indonesia | 25.87 | |
| 35 | 4 | 7 | Ģirts Feldbergs | Latvia | 25.93 | |
| 36 | 4 | 2 | Charles Hockin | Paraguay | 25.96 | |
| 37 | 4 | 1 | Clayton Jimmie | South Africa | 25.97 | |
| 38 | 3 | 5 | Diego Camacho | Mexico | 26.04 | |
| 39 | 3 | 1 | Jack Kirby | Barbados | 26.17 | |
| 40 | 3 | 6 | Tonnam Kanteemool | Thailand | 26.39 | |
| 41 | 4 | 6 | Jerard Jacinto | Suspended Member Federation | 26.41 | |
| 42 | 4 | 0 | Filippos Iakovidis | Cyprus | 26.42 | |
| 43 | 3 | 8 | Maximillian Wilson | U.S. Virgin Islands | 26.62 | |
| 44 | 4 | 9 | Noe Pantskhava | Georgia | 26.63 | |
| 45 | 3 | 3 | Homer Abbasi | Iran | 26.70 | |
| 45 | 3 | 7 | Lau Shiu Yue | Hong Kong | 26.70 | |
| 47 | 1 | 4 | Isaiah Aleksenko | Northern Mariana Islands | 26.94 | |
| 47 | 3 | 0 | Enkhtur Erkhes | Mongolia | 26.94 | NR |
| 49 | 2 | 3 | Hansel McCaig | Fiji | 26.97 | NR |
| 50 | 2 | 4 | Andrej Stojanovski | North Macedonia | 27.35 | NR |
| 51 | 1 | 6 | Tameea Elhamayda | Qatar | 27.41 | |
| 52 | 3 | 9 | Warren Lawrence | Dominica | 27.45 | |
| 53 | 2 | 2 | Mohamad Zubaid | Kuwait | 27.64 | |
| 54 | 2 | 5 | Bede Aitu | Cook Islands | 28.19 | |
| 55 | 2 | 6 | Jeno Heyns | Suriname | 28.30 | |
| 56 | 2 | 7 | Tajhari Williams | Turks and Caicos Islands | 29.44 | |
| 57 | 1 | 7 | Omer Huraish | Iraq | 29.88 | |
| 58 | 1 | 2 | Kapeli Siua | Tonga | 29.96 | |
| 59 | 2 | 1 | Swaleh Talib | Suspended Member Federation | 30.03 | |
| 60 | 2 | 9 | Troy Pino | Cape Verde | 30.85 | |
| 61 | 2 | 8 | Alexander Fleming-Lake | Anguilla | 30.89 | |
| 62 | 2 | 0 | Mohamed Shiham | Maldives | 31.44 | |
| 63 | 1 | 5 | Giorgio Nguichie Kamseu Kamogne | Cameroon | 33.75 | |
| 64 | 1 | 3 | Hamzah Mayas | Yemen | 39.35 | |
| | 1 | 1 | Ibrahim Kamara | Sierra Leone | Did not start | Did not start |
| | 3 | 4 | Dylan Carter | Trinidad and Tobago | Did not start | Did not start |
| | 5 | 8 | Bradley Woodward | Australia | Did not start | Did not start |

### Semifinals

The semifinal was held on 29 July at 21:06.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Justin Ress | United States | 24.35 | Q |
| 2 | 1 | 3 | Xu Jiayu | China | 24.41 | Q, NR |
| 2 | 2 | 5 | Hunter Armstrong | United States | 24.41 | Q |
| 4 | 1 | 5 | Ksawery Masiuk | Poland | 24.47 | Q |
| 5 | 1 | 4 | Apostolos Christou | Greece | 24.57 | Q |
| 5 | 1 | 6 | Thomas Ceccon | Italy | 24.57 | Q |
| 7 | 2 | 3 | Ole Braunschweig | Germany | 24.73 | Q |
| 8 | 2 | 7 | Andrew Jeffcoat | New Zealand | 24.81 | Q |
| 9 | 2 | 6 | Isaac Cooper | Australia | 24.86 | |
| 10 | 2 | 2 | Andrei-Mircea Anghel | Romania | 24.95 | |
| 11 | 1 | 2 | Kacper Stokowski | Poland | 24.99 | |
| 11 | 2 | 8 | Michael Laitarovsky | Israel | 24.99 | |
| 13 | 1 | 7 | Conor Ferguson | Ireland | 25.09 | |
| 14 | 2 | 1 | Takeshi Kawamoto | Japan | 25.14 | |
| 15 | 1 | 8 | Ryosuke Irie | Japan | 25.21 | |
| 16 | 1 | 1 | Yassin Hossam | Egypt | 25.22 | |

### Final

The final will be held on 30 July at 20:02.
| Rank | Lane | Name | Nationality | Time |
| | 3 | Hunter Armstrong | United States | 24.05 |
| | 4 | Justin Ress | United States | 24.24 |
| | 5 | Xu Jiayu | China | 24.50 |
| 4 | 6 | Ksawery Masiuk | Poland | 24.57 |
| 5 | 7 | Thomas Ceccon | Italy | 24.58 |
| 6 | 2 | Apostolos Christou | Greece | 24.60 |
| 7 | 8 | Andrew Jeffcoat | New Zealand | 24.66 |
| 8 | 1 | Ole Braunschweig | Germany | 24.93 |