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

The boys' 50 metre breaststroke event at the 2018 Summer Youth Olympics took place on 11 and 12 October at the Natatorium in Buenos Aires, Argentina.

## Results
### Heats

The heats were started on 11 October at 11:16.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 4 | Sun Jiajun | China | 27.91 | Q |
| 2 | 4 | 5 | Michael Houlie | South Africa | 27.99 | Q |
| 3 | 3 | 4 | Taku Taniguchi | Japan | 28.28 | Q |
| 4 | 5 | 2 | Denis Petrashov | Kyrgyzstan | 28.43 | Q |
| 5 | 5 | 5 | Alexander Milanovich | Canada | 28.46 | Q |
| 6 | 3 | 2 | Santiago Saint-Upery | Uruguay | 28.47 | Q |
| 7 | 3 | 3 | André Klippenberg Grindheim | Norway | 28.55 | Q |
| 8 | 4 | 3 | Juri Dijkstra | Netherlands | 28.79 | Q |
| 9 | 4 | 6 | Caspar Corbeau | Netherlands | 28.90 | Q |
| 10 | 4 | 1 | Andrés Puente | Mexico | 28.95 | Q |
| 11 | 5 | 3 | Didzis Rudavs | Latvia | 28.98 | Q |
| 12 | 4 | 2 | Izaak Bastian | Bahamas | 29.01 | Q |
| 13 | 4 | 4 | Vladislav Gerasimenko | Russia | 29.03 | Q |
| 14 | 5 | 1 | Samy Ahmed Boutouil | Morocco | 29.12 | Q |
| 15 | 3 | 5 | Vitor de Souza | Brazil | 29.16 | Q |
| 16 | 5 | 6 | Yu Hanaguruma | Japan | 29.18 | Q |
| 17 | 5 | 7 | Aleksey Sidorchuk | Uzbekistan | 29.24 | |
| 18 | 2 | 3 | Demirkan Demir | Turkey | 29.25 | |
| 19 | 2 | 4 | Moncef Aymen Balamane | Algeria | 29.30 | |
| 20 | 3 | 6 | Jan Kałusowski | Poland | 29.40 | |
| 21 | 3 | 1 | Ethan Dang | United States | 29.50 | |
| 22 | 4 | 7 | Sebestyén Böhm | Hungary | 29.57 | |
| 23 | 3 | 7 | Ahmed Yassine Fliyou | Morocco | 29.59 | |
| 24 | 4 | 8 | Dávid Gajdoš | Slovakia | 29.64 | |
| 25 | 1 | 6 | Samuele Rossi | Seychelles | 29.66 | |
| 26 | 2 | 5 | Amro Al-Wir | Jordan | 29.71 | |
| 27 | 3 | 8 | Maximillian Ang | Singapore | 30.09 | |
| 28 | 2 | 6 | Marcus Mok | Hong Kong | 30.37 | |
| 29 | 2 | 2 | Simon Greuter | Liechtenstein | 31.13 | |
| 30 | 2 | 7 | Leonard Kalate | Papua New Guinea | 31.45 | |
| 30 | 5 | 8 | Luis Weekes | Barbados | 31.45 | |
| 32 | 2 | 1 | Daniel Scott | Guyana | 33.28 | |
| 33 | 1 | 4 | Omar Barry | Burkina Faso | 41.81 | |
| 34 | 1 | 3 | Andrés Akue | Equatorial Guinea | 44.81 | |
| | 2 | 8 | Momodou Saine | The Gambia | DSQ | |
| | 1 | 5 | Eddie Boyengue | Republic of the Congo | DNS | |

### Semifinals

The semifinals were started on 11 October at 18:58.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 4 | Michael Houlie | South Africa | 27.33 | Q |
| 2 | 2 | 4 | Sun Jiajun | China | 28.05 | Q |
| 3 | 2 | 3 | Alexander Milanovich | Canada | 28.19 | Q |
| 4 | 2 | 5 | Taku Taniguchi | Japan | 28.22 | Q |
| 5 | 2 | 1 | Vladislav Gerasimenko | Russia | 28.43 | Q |
| 6 | 2 | 2 | Caspar Corbeau | Netherlands | 28.44 | Q |
| 7 | 2 | 8 | Vitor de Souza | Brazil | 28.53 | Q |
| 8 | 1 | 5 | Denis Petrashov | Kyrgyzstan | 28.62 | Q |
| 9 | 1 | 3 | Santiago Saint-Upery | Uruguay | 28.76 | |
| 10 | 1 | 6 | Juri Dijkstra | Netherlands | 28.77 | |
| 11 | 2 | 7 | Didzis Rudavs | Latvia | 28.89 | |
| 12 | 2 | 6 | André Klippenberg Grindheim | Norway | 28.93 | |
| 13 | 1 | 2 | Andrés Puente | Mexico | 28.97 | |
| 14 | 1 | 8 | Yu Hanaguruma | Japan | 29.01 | |
| 15 | 1 | 1 | Samy Ahmed Boutouil | Morocco | 29.10 | |
| 16 | 1 | 7 | Izaak Bastian | Bahamas | 29.35 | |

### Final

The final was held on 12 October at 19:29.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Michael Houlie | South Africa | 27.51 |
| | 5 | Sun Jiajun | China | 27.85 |
| | 3 | Alexander Milanovich | Canada | 27.87 |
| 4 | 6 | Taku Taniguchi | Japan | 28.20 |
| 5 | 1 | Vitor de Souza | Brazil | 28.24 |
| 6 | 2 | Vladislav Gerasimenko | Russia | 28.36 |
| 7 | 7 | Caspar Corbeau | Netherlands | 28.70 |
| 7 | 8 | Denis Petrashov | Kyrgyzstan | 28.70 |