# 2021 FINA World Swimming Championships (25 m) – Men's 50 metre backstroke

The Men's 50 metre backstroke competition of the 2021 FINA World Swimming Championships (25 m) was held on 18 and 19 December 2021.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Florent Manaudou (FRA) | 22.22 | Doha, Qatar | 6 December 2014 |
| Competition record | Florent Manaudou (FRA) | 22.22 | Doha, Qatar | 6 December 2014 |

## Results
### Heats

The heats were started on 18 December at 09:59.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 4 | Kliment Kolesnikov | Russian Swimming Federation | 23.14 | Q |
| 2 | 5 | 3 | Gabriel Fantoni | Brazil | 23.15 | Q |
| 3 | 3 | 4 | Shaine Casas | United States | 23.23 | Q |
| 4 | 5 | 5 | Pavel Samusenko | Russian Swimming Federation | 23.26 | Q |
| 5 | 6 | 5 | Christian Diener | Germany | 23.28 | Q |
| 6 | 4 | 6 | Kacper Stokowski | Poland | 23.33 | Q |
| 7 | 4 | 5 | Guilherme Guido | Brazil | 23.47 | Q |
| 8 | 4 | 3 | Lorenzo Mora | Italy | 23.49 | Q |
| 8 | 4 | 7 | Jan Čejka | Czech Republic | 23.49 | Q, NR |
| 10 | 5 | 4 | Michele Lamberti | Italy | 23.50 | Q |
| 11 | 5 | 2 | Mohamed Samy | Egypt | 23.54 | Q, NR |
| 11 | 6 | 3 | Apostolos Christou | Greece | 23.54 | Q |
| 13 | 5 | 6 | Ole Braunschweig | Germany | 23.57 | Q |
| 14 | 4 | 4 | Robert Glință | Romania | 23.58 | Q |
| 15 | 5 | 7 | Simon Bucher | Austria | 23.63 | Q |
| 16 | 6 | 1 | Alexis Santos | Portugal | 23.75 | QSO |
| 16 | 6 | 2 | Tomáš Franta | Czech Republic | 23.75 | QSO |
| 18 | 6 | 7 | Grigori Pekarski | Belarus | 23.77 | |
| 18 | 6 | 8 | Mewen Tomac | France | 23.77 | |
| 20 | 5 | 1 | Won Young-jun | South Korea | 23.94 | |
| 21 | 5 | 8 | Doruk Tekin | Turkey | 23.96 | |
| 21 | 6 | 6 | Viktar Staselovich | Belarus | 23.96 | |
| 23 | 4 | 2 | Markus Lie | Norway | 23.98 | |
| 24 | 4 | 1 | Yohann Ndoye Brouard | France | 24.03 | |
| 25 | 4 | 0 | Michael Laitarovsky | Israel | 24.32 | |
| 26 | 3 | 1 | Jerard Jacinto | Philippines | 24.40 | NR |
| 26 | 4 | 9 | Srihari Nataraj | India | 24.40 | NR |
| 28 | 6 | 9 | Hugo González | Spain | 24.41 | |
| 29 | 5 | 0 | Lau Shiu Yue | Hong Kong | 24.42 | |
| 30 | 4 | 8 | Yeziel Morales | Puerto Rico | 24.44 | |
| 31 | 6 | 0 | Charles Hockin | Paraguay | 24.48 | |
| 32 | 3 | 7 | Jack Kirby | Barbados | 24.71 | NR |
| 33 | 5 | 9 | I Gede Siman Sudartawa | Indonesia | 24.76 | |
| 34 | 3 | 8 | Oleksandr Zheltiakov | Ukraine | 24.82 | |
| 35 | 3 | 9 | Filippos Iakovidis | Cyprus | 25.17 | NR |
| 36 | 3 | 6 | Max Mannes | Luxembourg | 25.30 | |
| 37 | 2 | 4 | Akalanka Peiris | Sri Lanka | 25.31 | |
| 38 | 3 | 5 | Maximillian Wilson | United States Virgin Islands | 25.49 | |
| 39 | 2 | 5 | Ali Al-Zamil | Kuwait | 25.86 | |
| 40 | 3 | 0 | Gabriel Castillo | Bolivia | 25.96 | |
| 41 | 2 | 3 | Felipe Jaramillo | Ecuador | 26.18 | NR |
| 42 | 3 | 2 | Omar Al-Rowaila | Bahrain | 26.38 | |
| 43 | 3 | 3 | Abdellah Ardjoune | Algeria | 26.56 | |
| 44 | 2 | 2 | Mekhayl Engel | Curaçao | 26.68 | |
| 45 | 2 | 1 | Juwel Ahmmed | Bangladesh | 27.04 | |
| 46 | 2 | 6 | Tameea Elhamayda | Qatar | 27.80 | |
| 47 | 1 | 3 | Rohan Shearer | Turks and Caicos Islands | 28.96 | |
| 48 | 2 | 7 | Ahmed Al-Marzooqi | United Arab Emirates | 29.44 | |
| 49 | 2 | 8 | Papa Poku-Dwumoh | Ghana | 30.17 | |
| | 1 | 4 | Souleymane Napare | Burkina Faso | DNS | |
| | 1 | 5 | Yousef Al-Washali | Yemen | DNS | |

#### Swim-off

The swim-off was held on 18 December at 11:38.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Alexis Santos | Portugal | 23.41 | Q, NR |
| 2 | 5 | Tomáš Franta | Czech Republic | 23.71 | |

### Semifinals

The semifinals were started on 18 December at 19:25.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 5 | Pavel Samusenko | Russian Swimming Federation | 22.74 | Q |
| 2 | 2 | 4 | Kliment Kolesnikov | Russian Swimming Federation | 22.78 | Q |
| 3 | 2 | 3 | Christian Diener | Germany | 22.89 | Q |
| 4 | 1 | 6 | Lorenzo Mora | Italy | 23.13 | Q |
| 4 | 2 | 5 | Shaine Casas | United States | 23.13 | Q |
| 6 | 1 | 2 | Michele Lamberti | Italy | 23.15 | Q |
| 7 | 1 | 3 | Kacper Stokowski | Poland | 23.17 | Q |
| 8 | 1 | 7 | Apostolos Christou | Greece | 23.26 | Q |
| 9 | 1 | 1 | Robert Glință | Romania | 23.28 | |
| 10 | 1 | 8 | Alexis Santos | Portugal | 23.35 | NR |
| 11 | 1 | 4 | Gabriel Fantoni | Brazil | 23.37 | |
| 12 | 2 | 2 | Jan Čejka | Czech Republic | 23.40 | NR |
| 13 | 2 | 6 | Guilherme Guido | Brazil | 23.51 | |
| 14 | 2 | 1 | Ole Braunschweig | Germany | 23.54 | |
| 15 | 2 | 8 | Simon Bucher | Austria | 23.58 | |
| 16 | 2 | 7 | Mohamed Samy | Egypt | 23.65 | |

### Final

The final was held on 19 December at 19:35.
| Rank | Lane | Name | Nationality | Time |
| | 5 | Kliment Kolesnikov | Russian Swimming Federation | 22.66 |
| | 3 | Christian Diener | Germany | 22.90 |
| | 6 | Lorenzo Mora | Italy | 22.90 |
| 4 | 4 | Pavel Samusenko | Russian Swimming Federation | 22.93 |
| 5 | 7 | Michele Lamberti | Italy | 22.94 |
| 6 | 1 | Kacper Stokowski | Poland | 22.98 |
| 7 | 2 | Shaine Casas | United States | 22.99 |
| 8 | 8 | Apostolos Christou | Greece | 23.08 |