# Swimming at the 2018 Summer Youth Olympics – Boys' 50 metre backstroke

The boys' 50 metre backstroke event at the 2018 Summer Youth Olympics took place on 9 and 10 October at the Natatorium in Buenos Aires, Argentina.

## Results
### Heats

The heats were started on 9 October at 10:38.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | 4 | Kliment Kolesnikov | Russia | 24.74 | Q |
| 2 | 3 | 4 | Wang Guanbin | China | 25.93 | Q |
| 3 | 4 | 5 | Tomoe Zenimoto Hvas | Norway | 26.14 | Q |
| 4 | 2 | 4 | Thomas Ceccon | Italy | 26.24 | Q |
| 5 | 3 | 1 | Anthony Rincón | Colombia | 26.27 | Q |
| 6 | 4 | 2 | Lewis Blackburn | Australia | 26.29 | Q |
| 7 | 3 | 3 | Sebastian Somerset | Canada | 26.30 | Q |
| 8 | 2 | 1 | Roni Kallström | Finland | 26.32 | Q |
| 9 | 2 | 2 | Akalanka Peiris | Sri Lanka | 26.33 | Q, NR |
| 10 | 3 | 2 | Guillermo Cruz | Mexico | 26.35 | Q |
| 11 | 3 | 6 | Chuang Mu-lun | Chinese Taipei | 26.38 | Q |
| 11 | 4 | 3 | Abdellah Ardjoune | Algeria | 26.38 | Q |
| 13 | 3 | 5 | Kenzo Simons | Netherlands | 26.41 | Q |
| 14 | 2 | 3 | Gábor Zombori | Hungary | 26.44 | Q |
| 15 | 4 | 1 | Arijaus Pavlidi | Lithuania | 26.46 | Q |
| 16 | 2 | 5 | Jack Kirby | Barbados | 26.48 | Q |
| 17 | 4 | 6 | Marvin Miglbauer | Austria | 26.50 | |
| 18 | 2 | 6 | Srihari Nataraj | India | 26.55 | |
| 19 | 2 | 7 | Alanas Tautkus | Lithuania | 26.63 | |
| 20 | 4 | 8 | Ethan Harder | United States | 26.84 | |
| 21 | 4 | 7 | Hendrik Duvenhage | South Africa | 26.97 | |
| 22 | 3 | 7 | Manuel Martos | Spain | 27.07 | |
| 23 | 3 | 8 | Brynjólfur Óli Karlsson | Iceland | 28.09 | |
| 24 | 1 | 5 | Bede Aitu | Cook Islands | 28.90 | |
| 25 | 1 | 4 | Finau 'Ohuafi | Tonga | 29.26 | |
| 26 | 1 | 3 | Dennis Mhini | Tanzania | 29.79 | |

### Semifinals

The semifinals were started on 9 October at 19:08.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Kliment Kolesnikov | Russia | 24.56 | Q |
| 2 | 2 | 5 | Tomoe Zenimoto Hvas | Norway | 25.12 | Q |
| 3 | 2 | 1 | Kenzo Simons | Netherlands | 25.81 | Q |
| 4 | 1 | 5 | Thomas Ceccon | Italy | 25.98 | Q |
| 5 | 1 | 4 | Wang Guanbin | China | 26.05 | Q |
| 6 | 1 | 1 | Gábor Zombori | Hungary | 26.10 | Q |
| 7 | 1 | 3 | Lewis Blackburn | Australia | 26.17 | Q |
| 8 | 1 | 2 | Guillermo Cruz | Mexico | 26.20 | Q |
| 9 | 2 | 3 | Anthony Rincón | Colombia | 26.33 | |
| 10 | 2 | 2 | Akalanka Peiris | Sri Lanka | 26.36 | |
| 11 | 2 | 6 | Sebastian Somerset | Canada | 26.45 | |
| 12 | 2 | 7 | Chuang Mu-lun | Chinese Taipei | 26.59 | |
| 13 | 1 | 7 | Abdellah Ardjoune | Algeria | 26.64 | |
| 14 | 1 | 8 | Jack Kirby | Barbados | 26.77 | |
| 15 | 1 | 6 | Roni Kallström | Finland | 26.79 | |
| 16 | 2 | 8 | Arijaus Pavlidi | Lithuania | 26.93 | |

### Final

The final was held on 10 October at 18:34.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Kliment Kolesnikov | Russia | 24.40 |
| | 6 | Thomas Ceccon | Italy | 25.27 |
| | 5 | Tomoe Zenimoto Hvas | Norway | 25.28 |
| 4 | 2 | Wang Guanbin | China | 25.83 |
| 5 | 1 | Lewis Blackburn | Australia | 25.99 |
| 6 | 3 | Kenzo Simons | Netherlands | 26.26 |
| 7 | 8 | Guillermo Cruz | Mexico | 26.56 |
| 8 | 7 | Gábor Zombori | Hungary | 26.63 |