# 2024 World Aquatics Swimming Championships (25 m) – Men's 100 metre backstroke

The Men's 100 metre backstroke competition of the 2024 World Aquatics Swimming Championships (25 m) was held on 10 and 11 December 2024.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Coleman Stewart (USA) | 48.33 | Napoli, Italy | 29 August 2021 |
| Competition record | Ryan Murphy (USA) | 48.50 | Melbourne, Australia | 14 December 2022 |

## Results
### Heats

The heats were started on 10 December at 09:54.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 0 | Hubert Kós | Hungary | 49.12 | Q, NR |
| 2 | 6 | 5 | Kacper Stokowski | Poland | 49.22 | Q, NR |
| 3 | 6 | 4 | Miron Lifintsev | Neutral Athletes B | 49.44 | Q |
| 4 | 4 | 2 | Ruard van Renen | South Africa | 49.73 | Q |
| 5 | 3 | 5 | Blake Tierney | Canada | 49.85 | Q |
| 6 | 5 | 4 | Pavel Samusenko | Neutral Athletes B | 50.20 | Q |
| 7 | 4 | 4 | Mewen Tomac | France | 50.22 | Q |
| 8 | 6 | 3 | Lorenzo Mora | Italy | 50.30 | Q |
| 9 | 6 | 7 | Denis Popescu | Romania | 50.35 | Q |
| 10 | 5 | 2 | Ralf Tribuntsov | Estonia | 50.38 | Q, NR |
| 11 | 6 | 6 | Christian Bacico | Italy | 50.48 | Q |
| 12 | 4 | 3 | Isaac Cooper | Australia | 50.60 | Q |
| 13 | 6 | 0 | Jack Aikins | United States | 50.64 | Q |
| 14 | 5 | 5 | Yohann Ndoye-Brouard | France | 50.80 | Q |
| 14 | 6 | 9 | Ksawery Masiuk | Poland | 50.80 | Q |
| 16 | 4 | 5 | Masaki Yura | Japan | 50.81 | Q |
| 17 | 4 | 8 | Oliver Morgan | Great Britain | 50.91 | R |
| 18 | 5 | 6 | Ole Braunschweig | Germany | 50.94 | R |
| 19 | 6 | 2 | Miroslav Knedla | Czech Republic | 51.13 | |
| 20 | 6 | 8 | Cooper Morley | New Zealand | 51.14 | |
| 21 | 6 | 1 | Enoch Robb | Australia | 51.21 | |
| 21 | 5 | 8 | John Shortt | Ireland | 51.21 | |
| 23 | 4 | 1 | Iván Martínez | Spain | 51.22 | |
| 24 | 4 | 6 | Wang Gukailai | China | 51.25 | |
| 25 | 3 | 1 | Mantas Kaušpėdas | Lithuania | 51.34 | |
| 26 | 3 | 2 | Maximillian Wilson | United States Virgin Islands | 51.37 | NR |
| 27 | 5 | 3 | Andrei Ungur | Romania | 51.58 | |
| 28 | 2 | 3 | Hayden Kwan | Hong Kong | 51.59 | |
| 29 | 3 | 4 | Ádám Jászó | Hungary | 51.65 | |
| 30 | 4 | 9 | Roman Mityukov | Switzerland | 51.74 | |
| 31 | 3 | 3 | Oleksandr Zheltiakov | Ukraine | 51.78 | NR |
| 32 | 5 | 1 | Markus Lie | Norway | 51.79 | |
| 33 | 4 | 0 | Evangelos Makrygiannis | Greece | 52.04 | |
| 34 | 3 | 8 | Noe Pantskhava | Georgia | 52.18 | |
| 35 | 3 | 0 | Yeziel Morales | Puerto Rico | 52.22 | |
| 36 | 3 | 6 | Ulises Saravia | Argentina | 52.26 | |
| 37 | 5 | 7 | Xu Yifan | China | 52.27 | |
| 38 | 3 | 7 | Chuang Mu-lun | Chinese Taipei | 52.38 | |
| 39 | 2 | 8 | Dino Hasibović Sirotanović | Bosnia and Herzegovina | 52.50 | NR |
| 40 | 5 | 9 | Guðmundur Leo Rafnsson | Iceland | 52.69 | |
| 41 | 3 | 9 | Martin Perečinský | Slovakia | 52.88 | |
| 42 | 2 | 6 | Yegor Popov | Kazakhstan | 53.10 | |
| 43 | 2 | 5 | Ģirts Feldbergs | Latvia | 53.16 | |
| 44 | 4 | 7 | Rasim Oğulcan Gör | Turkey | 53.19 | |
| 45 | 1 | 6 | Akash Mani | India | 54.05 | |
| 46 | 1 | 4 | Samiul Islam Rafi | Bangladesh | 54.37 | NR |
| 47 | 2 | 4 | Joaquín Vargas | Peru | 54.55 | |
| 48 | 2 | 1 | Denilson Cyprianos | Zimbabwe | 54.78 | NR |
| 49 | 2 | 9 | Mikhail Kleshko | Uzbekistan | 54.84 | NR |
| 50 | 2 | 7 | Charles Hockin | Paraguay | 54.85 | |
| 51 | 2 | 2 | Farrel Tangkas | Indonesia | 54.94 | |
| 52 | 2 | 0 | Mohamad Zubaid | Kuwait | 55.18 | |
| 53 | 1 | 5 | Tendo Kaumi | Uganda | 58.14 | NR |
| 54 | 1 | 3 | Eid Al-Mujaini | United Arab Emirates | 59.85 | |

### Semifinals

The semifinals were started on 10 December at 18:34.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Hubert Kos | Hungary | 49.03 | Q, NR |
| 2 | 2 | 5 | Miron Lifintsev | Neutral Athletes B | 49.07 | Q |
| 3 | 1 | 4 | Kacper Stokowski | Poland | 49.20 | Q, NR |
| 4 | 1 | 6 | Lorenzo Mora | Italy | 49.54 | Q |
| 5 | 1 | 3 | Pavel Samusenko | Neutral Athletes B | 49.88 | Q |
| 6 | 1 | 5 | Ruard Vanrenen | South Africa | 49.89 | Q |
| 7 | 1 | 7 | Isaac Cooper | Australia | 50.01 | Q |
| 8 | 2 | 3 | Blake Tierney | Canada | 50.03 | Q |
| 9 | 2 | 6 | Mewen Tomac | France | 50.06 | R |
| 10 | 1 | 2 | Ralf Tribuntsov | Estonia | 50.25 | R, NR |
| 11 | 1 | 1 | Yohann Ndoye-Brouard | France | 50.33 | |
| 12 | 2 | 8 | Ksawery Masiuk | Poland | 50.43 | |
| 13 | 2 | 1 | Jack Aikins | United States | 50.46 | |
| =14 | 2 | 2 | Denis-Laurean Popescu | Romania | 50.61 | |
| =14 | 2 | 7 | Christian Bacico | Italy | 50.61 | |
| 16 | 1 | 8 | Masaki Yura | Japan | 50.95 | |

### Final

The final was started on 11 December at 17:40.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Miron Lifintsev | Neutral Athletes B | 48.76 | WJ |
| | 4 | Hubert Kos | Hungary | 48.79 | NR |
| | 4 | Kacper Stokowski | Poland | 49.16 | NR |
| 4 | 2 | Pavel Samusenko | Neutral Athletes B | 49.20 | |
| 5 | 8 | Blake Tierney | Canada | 49.39 | NR |
| 6 | 6 | Lorenzo Mora | Italy | 49.54 | |
| 7 | 1 | Isaac Cooper | Australia | 49.60 | |
| 8 | 7 | Ruard Vanrenen | South Africa | 49.61 | |