# Swimming at the 2018 Summer Youth Olympics – Girls' 50 metre butterfly

The girls' 50 metre butterfly 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 10:22.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | 4 | Anastasiya Shkurdai | Belarus | 26.56 | Q |
| 2 | 3 | 4 | Lin Xintong | China | 26.84 | Q |
| 3 | 5 | 5 | Mayuka Yamamoto | Japan | 26.84 | Q |
| 4 | 5 | 4 | Sara Junevik | Sweden | 26.91 | Q |
| 5 | 5 | 3 | Angelina Köhler | Germany | 26.96 | Q |
| 6 | 3 | 2 | Anicka Delgado | Ecuador | 27.28 | Q |
| 7 | 4 | 3 | Miriam Guevara | Mexico | 27.42 | Q |
| 8 | 5 | 6 | Polina Egorova | Russia | 27.43 | Q |
| 9 | 5 | 1 | Kyla Leibel | Canada | 27.45 | Q |
| 10 | 2 | 4 | Julieta Lema | Argentina | 27.55 | Q |
| 11 | 4 | 1 | Beatriz Padrón | Costa Rica | 27.56 | Q |
| 12 | 2 | 6 | Diana Nazarova | Kazakhstan | 27.64 | Q |
| 13 | 3 | 6 | Chen Yu-rong | Chinese Taipei | 27.66 | Q |
| 14 | 4 | 6 | Tamara Potocká | Slovakia | 27.69 | Q |
| 15 | 4 | 5 | Aleyna Özkan | Turkey | 27.76 | Q |
| 16 | 2 | 3 | Ieva Maļuka | Latvia | 27.85 | QSO |
| 16 | 3 | 1 | Michaela Ryan | Australia | 27.85 | QSO |
| 16 | 4 | 2 | Alexandra Schegoleva | Cyprus | 27.85 | QSO |
| 19 | 5 | 2 | Lismar Lyon | Venezuela | 27.90 | |
| 20 | 5 | 7 | Kornelia Fiedkiewicz | Poland | 27.98 | |
| 21 | 3 | 8 | Natalie Kan | Hong Kong | 28.01 | |
| 22 | 4 | 8 | Nea-Amanda Heinola | Finland | 28.04 | |
| 23 | 1 | 7 | Yuliia Stadnyk | Ukraine | 28.15 | |
| 24 | 4 | 7 | Valentina Becerra | Colombia | 28.21 | |
| 25 | 3 | 5 | Karolina Jurczyk | Poland | 28.25 | |
| 26 | 3 | 7 | Kristýna Štemberová | Czech Republic | 28.33 | |
| 27 | 2 | 5 | Victoria Russell | Bahamas | 28.40 | |
| 28 | 5 | 8 | Elinah Phillip | British Virgin Islands | 28.65 | |
| 29 | 1 | 4 | Dune Coetzee | South Africa | 28.70 | |
| 30 | 2 | 1 | Mariel Mencía | Dominican Republic | 28.80 | |
| 31 | 2 | 7 | Madelyn Moore | Bermuda | 28.96 | |
| 32 | 2 | 8 | Inés Marín | Chile | 28.99 | |
| 33 | 1 | 5 | Theresa Hefel | Liechtenstein | 29.52 | |
| 34 | 1 | 2 | Ruvarashe Gondo | Botswana | 32.16 | |
| 35 | 1 | 3 | Margie Winter | Federated States of Micronesia | 32.40 | |
| 36 | 1 | 6 | Anastasiya Tyurina | Tajikistan | 33.37 | |
| | 2 | 2 | Leoni Richter | Switzerland | DNS | |
| | 3 | 3 | Julia Mrozinski | Germany | DNS | |

### Swim-off

The swim-off was held on 9 October at 11:31.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | Michaela Ryan | Australia | 27.88 | Q |
| 2 | 4 | Ieva Maļuka | Latvia | 27.93 | |
| 3 | 3 | Alexandra Schegoleva | Cyprus | 27.94 | |

### Semifinals

The semifinals were started on 9 October at 18:13.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 3 | Angelina Köhler | Germany | 26.65 | Q |
| 1 | 2 | 4 | Anastasiya Shkurdai | Belarus | 26.65 | Q |
| 3 | 1 | 5 | Sara Junevik | Sweden | 26.75 | Q |
| 4 | 1 | 4 | Lin Xintong | China | 26.83 | Q |
| 5 | 1 | 3 | Anicka Delgado | Ecuador | 26.92 | Q |
| 6 | 1 | 1 | Tamara Potocká | Slovakia | 26.95 | Q |
| 7 | 1 | 6 | Polina Egorova | Russia | 26.98 | Q |
| 8 | 2 | 5 | Mayuka Yamamoto | Japan | 27.12 | Q |
| 9 | 1 | 2 | Julieta Lema | Argentina | 27.16 | |
| 10 | 2 | 1 | Chen Yu-rong | Chinese Taipei | 27.17 | |
| 11 | 2 | 2 | Kyla Leibel | Canada | 27.30 | |
| 12 | 2 | 6 | Miriam Guevara | Mexico | 27.70 | |
| 13 | 1 | 7 | Diana Nazarova | Kazakhstan | 27.71 | |
| 14 | 2 | 8 | Aleyna Özkan | Turkey | 27.77 | |
| 15 | 1 | 8 | Michaela Ryan | Australia | 28.06 | |
| 16 | 2 | 7 | Beatriz Padrón | Costa Rica | 28.18 | |

### Final

The final was held on 10 October at 18:29.
| Rank | Lane | Name | Nationality | Time |
| | 3 | Sara Junevik | Sweden | 26.40 |
| | 5 | Anastasiya Shkurdai | Belarus | 26.62 |
| | 1 | Polina Egorova | Russia | 26.68 |
| | 4 | Angelina Köhler | Germany | 26.68 |
| 5 | 2 | Anicka Delgado | Ecuador | 26.80 |
| 6 | 6 | Lin Xintong | China | 27.10 |
| 7 | 8 | Mayuka Yamamoto | Japan | 27.17 |
| 8 | 7 | Tamara Potocká | Slovakia | 27.48 |