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

The boys' 100 metre freestyle 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 10:48.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 6 | Lee Yoo-yeon | South Korea | 50.11 | Q |
| 2 | 6 | 5 | Jakub Kraska | Poland | 50.17 | Q |
| 3 | 6 | 4 | Kristóf Milák | Hungary | 50.18 | Q |
| 4 | 5 | 4 | Andrei Minakov | Russia | 50.20 | Q |
| 5 | 4 | 4 | André Calvelo | Brazil | 50.24 | Q |
| 6 | 6 | 6 | Rafael Miroslaw | Germany | 50.54 | Q |
| 7 | 5 | 5 | Daniil Markov | Russia | 50.60 | Q, WD |
| 8 | 6 | 3 | Lucas Peixoto | Brazil | 50.70 | Q |
| 9 | 3 | 6 | Hong Jinquan | China | 50.81 | Q |
| 10 | 6 | 7 | Michael Pickett | New Zealand | 50.89 | Q |
| 11 | 4 | 3 | Denis Loktev | Israel | 50.91 | Q |
| 12 | 5 | 3 | Robin Hanson | Sweden | 50.99 | Q |
| 13 | 5 | 7 | Antonio Djakovic | Switzerland | 51.04 | Q |
| 14 | 4 | 6 | Ashton Brinkworth | Australia | 51.05 | Q |
| 15 | 6 | 2 | Robbie Powell | Ireland | 51.19 | Q |
| 16 | 5 | 1 | Guillermo Cruz | Mexico | 51.23 | Q |
| 17 | 3 | 5 | Artur Barseghyan | Armenia | 51.33 | Q |
| 18 | 6 | 1 | Thomas Ceccon | Italy | 51.42 | |
| 19 | 4 | 8 | Mohamed Aziz Ghaffari | Tunisia | 51.55 | |
| 20 | 5 | 8 | Mohammed Bedour | Jordan | 51.56 | |
| 21 | 3 | 4 | Joshua Liendo | Canada | 51.60 | |
| 22 | 5 | 5 | Jean-Marc Delices | France | 51.62 | |
| 23 | 2 | 4 | Dušan Babić | Serbia | 51.71 | |
| 24 | 4 | 2 | Joseph Jackson | Australia | 51.87 | |
| 25 | 3 | 8 | Efe Turan | Turkey | 51.94 | |
| 26 | 4 | 5 | Björn Seeliger | Sweden | 51.99 | |
| 26 | 4 | 7 | Gabriel Nortjie | South Africa | 51.99 | |
| 28 | 2 | 3 | Alireza Yavari | Iran | 52.08 | |
| 29 | 3 | 2 | Kai Legband | Bermuda | 52.21 | |
| 30 | 6 | 8 | Jack Kirby | Barbados | 52.29 | |
| 31 | 3 | 1 | Kirill Shatskov | Kazakhstan | 52.43 | |
| 32 | 4 | 1 | George Rațiu | Romania | 52.61 | |
| 33 | 3 | 3 | Akhmadjon Umurov | Uzbekistan | 52.80 | |
| 34 | 3 | 7 | Mateo Matheos | Paraguay | 52.94 | |
| 35 | 2 | 7 | Jordan Crooks | Cayman Islands | 53.52 | |
| 36 | 2 | 5 | Bob Sauber | Luxembourg | 53.59 | |
| 37 | 2 | 6 | Delron Felix | Grenada | 53.64 | |
| 38 | 2 | 2 | Jayhan Odlum-Smith | Saint Lucia | 54.99 | |
| 39 | 2 | 1 | Raffaele Tamagnini | San Marino | 55.55 | |
| 40 | 2 | 8 | Noel Keane | Palau | 55.59 | |
| 41 | 1 | 4 | Ky Odlum | Virgin Islands | 56.23 | |
| 42 | 1 | 5 | Nur Haziq Samil | Brunei | 58.38 | |
| 43 | 1 | 3 | Denis Mhini | Tanzania | 58.53 | |
| 44 | 1 | 6 | Shihab Fayez | Oman | 1:00.68 | |
| 45 | 1 | 7 | Mubal Azzam Ibrahim | Maldives | 1:02.71 | |
| 46 | 1 | 2 | Daniel Ranis | Marshall Islands | 1:09.42 | |

### Semifinals

The semifinals were started on 11 October at 18:22.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 4 | Jakub Kraska | Poland | 49.70 | Q |
| 2 | 2 | 3 | André Calvelo | Brazil | 49.87 | Q |
| 3 | 2 | 4 | Lee Yoo-yeon | South Korea | 50.07 | Q |
| 4 | 1 | 5 | Andrei Minakov | Russia | 50.16 | Q |
| 5 | 2 | 7 | Robin Hanson | Sweden | 50.17 | Q |
| 6 | 1 | 3 | Rafael Miroslaw | Germany | 50.28 | Q |
| 7 | 2 | 5 | Kristóf Milák | Hungary | 50.36 | Q, WD |
| 8 | 2 | 6 | Lucas Peixoto | Brazil | 50.53 | Q |
| 9 | 1 | 6 | Hong Jinquan | China | 50.71 | Q |
| 10 | 1 | 7 | Antonio Djakovic | Switzerland | 50.73 | |
| 11 | 1 | 1 | Robbie Powell | Ireland | 50.76 | |
| 12 | 2 | 1 | Ashton Brinkworth | Australia | 50.77 | |
| 13 | 1 | 2 | Denis Loktev | Israel | 50.81 | |
| 14 | 2 | 8 | Guillermo Cruz | Mexico | 50.84 | |
| 15 | 2 | 2 | Michael Pickett | New Zealand | 50.86 | |
| 16 | 1 | 8 | Artur Barseghyan | Armenia | 51.14 | |

### Final

The final was held on 12 October at 18:24.
| Rank | Lane | Name | Nationality | Time |
| | 6 | Andrei Minakov | Russia | 49.23 |
| | 4 | Jakub Kraska | Poland | 49.26 |
| | 2 | Robin Hanson | Sweden | 49.52 |
| 4 | 5 | André Calvelo | Brazil | 49.86 |
| 5 | 3 | Lee Yoo-yeon | South Korea | 50.10 |
| 6 | 7 | Rafael Miroslaw | Germany | 50.13 |
| 7 | 8 | Hong Jinquan | China | 50.35 |
| 8 | 1 | Lucas Peixoto | Brazil | 50.43 |