# Swimming at the 2018 Summer Youth Olympics – Boys' 100 metre backstroke

The boys' 100 metre backstroke event at the 2018 Summer Youth Olympics took place on 7 and 8 October at the Natatorium in Buenos Aires, Argentina.

## Results
### Heats

The heats were started on 7 October at 10:38.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | 4 | Kliment Kolesnikov | Russia | 54.26 | Q |
| 2 | 3 | 4 | Daniel Cristian Martin | Romania | 54.46 | Q |
| 3 | 2 | 4 | Thomas Ceccon | Italy | 55.33 | Q |
| 4 | 2 | 7 | Tomoe Zenimoto Hvas | Norway | 55.64 | Q |
| 5 | 4 | 5 | Wang Guanbin | China | 56.01 | Q |
| 6 | 2 | 5 | Manuel Martos | Spain | 56.03 | Q |
| 7 | 3 | 6 | Lewis Blackburn | Australia | 56.24 | Q |
| 8 | 3 | 5 | Gábor Zombori | Hungary | 56.46 | Q |
| 9 | 4 | 2 | Srihari Nataraj | India | 56.75 | Q |
| 10 | 3 | 2 | Ethan Harder | United States | 56.80 | Q |
| 11 | 4 | 7 | Alanas Tautkus | Lithuania | 56.81 | Q |
| 12 | 3 | 3 | Sebastian Somerset | Canada | 56.84 | Q |
| 13 | 4 | 3 | Abdellah Ardjoune | Algeria | 56.93 | Q |
| 14 | 2 | 6 | Chuang Mu-lun | Chinese Taipei | 56.94 | Q |
| 15 | 4 | 6 | Jack Kirby | Barbados | 57.03 | Q |
| 16 | 4 | 1 | Akalanka Peiris | Sri Lanka | 57.34 | Q |
| 17 | 2 | 2 | Stuart Swinburn | Australia | 57.46 | |
| 18 | 3 | 8 | Ivan Štšeglov | Estonia | 57.57 | |
| 19 | 3 | 1 | Roni Kallström | Finland | 57.65 | |
| 20 | 3 | 7 | Marvin Miglbauer | Austria | 57.84 | |
| 21 | 4 | 8 | Ramy Ghaziri | Lebanon | 58.27 | |
| 22 | 2 | 1 | Hendrik Duvenhage | South Africa | 58.31 | |
| 23 | 1 | 4 | Guillermo Cruz | Mexico | 58.40 | |
| 24 | 1 | 5 | Marcus Mok | Hong Kong | 58.63 | |
| 25 | 1 | 3 | Bede Aitu | Cook Islands | 1:03.49 | |
| | 2 | 3 | Björn Seeliger | Sweden | DNS | |

### Semifinals

The semifinals were started on 7 October at 18:15.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Kliment Kolesnikov | Russia | 53.80 | Q |
| 2 | 1 | 4 | Daniel Cristian Martin | Romania | 54.08 | Q |
| 3 | 1 | 5 | Tomoe Zenimoto Hvas | Norway | 54.93 | Q, WD |
| 4 | 2 | 5 | Thomas Ceccon | Italy | 55.48 | Q |
| 5 | 2 | 3 | Wang Guanbin | China | 55.77 | Q |
| 6 | 1 | 6 | Gábor Zombori | Hungary | 56.19 | Q |
| 7 | 1 | 3 | Manuel Martos | Spain | 56.20 | Q |
| 8 | 2 | 6 | Lewis Blackburn | Australia | 56.27 | Q |
| 9 | 2 | 2 | Srihari Nataraj | India | 56.48 | Q |
| 10 | 2 | 7 | Alanas Tautkus | Lithuania | 56.49 | |
| 11 | 2 | 8 | Jack Kirby | Barbados | 56.67 | |
| 12 | 1 | 1 | Chuang Mu-lun | Chinese Taipei | 56.82 | |
| 13 | 1 | 2 | Ethan Harder | United States | 56.83 | |
| 14 | 2 | 1 | Abdellah Ardjoune | Algeria | 56.86 | |
| 15 | 1 | 7 | Sebastian Somerset | Canada | 56.98 | |
| 16 | 1 | 8 | Akalanka Peiris | Sri Lanka | 57.35 | |
* Kliment Kolesnikov
* Daniel Cristian Martin
* Tomoe Zenimoto Hvas

### Final

The final was held on 8 October at 18:00.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Kliment Kolesnikov | Russia | 53.26 |
| | 5 | Daniel Cristian Martin | Romania | 53.59 |
| | 3 | Thomas Ceccon | Italy | 53.65 |
| 4 | 6 | Wang Guanbin | China | 55.33 |
| 5 | 7 | Manuel Martos | Spain | 55.83 |
| 6 | 8 | Srihari Nataraj | India | 56.12 |
| 7 | 2 | Gábor Zombori | Hungary | 56.21 |
| 8 | 1 | Lewis Blackburn | Australia | 56.23 |