# Swimming at the 2018 Summer Youth Olympics – Girls' 100 metre breaststroke

The girls' 100 metre breaststroke 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 10:41.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 5 | Anastasia Makarova | Russia | 1:08.80 | Q |
| 2 | 6 | 4 | Mona McSharry | Ireland | 1:09.24 | Q |
| 3 | 4 | 3 | Shiori Asaba | Japan | 1:09.27 | Q |
| 4 | 5 | 4 | Niamh Coyne | Ireland | 1:09.49 | Q |
| 5 | 6 | 3 | Anna Pirovano | Italy | 1:09.78 | Q |
| 6 | 4 | 4 | Kotryna Teterevkova | Lithuania | 1:10.06 | Q |
| 7 | 4 | 2 | Hannah Brunzell | Sweden | 1:10.10 | Q |
| 8 | 6 | 6 | Chelsea Hodges | Australia | 1:10.37 | Q |
| 9 | 6 | 5 | Weronika Hallmann | Poland | 1:10.47 | Q |
| 10 | 4 | 5 | Avery Wiseman | Canada | 1:10.63 | Q |
| 11 | 6 | 2 | Elena Guttmann | Austria | 1:10.86 | Q |
| 12 | 3 | 5 | Julia Månsson | Sweden | 1:10.91 | Q |
| 12 | 4 | 6 | Tina Čelik | Slovenia | 1:10.91 | Q |
| 14 | 5 | 3 | Zheng Muyan | China | 1:10.94 | Q |
| 15 | 5 | 6 | Agnė Šeleikaitė | Lithuania | 1:10.95 | Q |
| 16 | 4 | 1 | Clara Basso-Bert | France | 1:11.31 | Q |
| 17 | 2 | 4 | Yun Eun-sol | South Korea | 1:11.37 | |
| 18 | 3 | 3 | Anna Kroniger | Germany | 1:11.51 | |
| 19 | 3 | 1 | Christie Chue | Singapore | 1:11.56 | |
| 20 | 6 | 8 | Christin Mundell | South Africa | 1:11.58 | |
| 21 | 5 | 7 | Alba Vázquez | Spain | 1:11.69 | |
| 22 | 4 | 7 | Kate Douglass | United States | 1:11.77 | |
| 23 | 3 | 8 | Saovanee Boonamphai | Thailand | 1:11.82 | |
| 24 | 3 | 4 | Anastasia Moscenscaia | Moldova | 1:12.00 | |
| 25 | 4 | 8 | Wang Hee-song | South Korea | 1:12.01 | |
| 26 | 3 | 6 | Claudia Maria Gâdea | Romania | 1:12.04 | |
| 27 | 5 | 1 | Raquel Pereira | Portugal | 1:12.13 | |
| 28 | 2 | 2 | Mila Medić | Serbia | 1:12.14 | |
| 29 | 1 | 5 | María Alborzen | Argentina | 1:12.23 | |
| 30 | 3 | 7 | Ingrid Huszár | Romania | 1:12.36 | |
| 31 | 5 | 2 | Nina Kucheran | Canada | 1:12.50 | |
| 32 | 6 | 7 | Ana Vieira | Brazil | 1:12.57 | |
| 33 | 1 | 4 | Lea Polonsky | Israel | 1:12.69 | |
| 34 | 2 | 3 | Emina Pašukan | Bosnia and Herzegovina | 1:12.73 | |
| 34 | 3 | 2 | Laura Lahtinen | Finland | 1:12.73 | |
| 36 | 2 | 7 | Elena Onieva Henrich | Switzerland | 1:13.00 | |
| 37 | 2 | 5 | Natalie Kan | Hong Kong | 1:13.04 | |
| 38 | 2 | 6 | Nika Čulina | Croatia | 1:13.18 | |
| 39 | 2 | 1 | Miroslava Záborská | Slovakia | 1:13.30 | |
| 40 | 5 | 8 | Gülşen Beste Samancı | Turkey | 1:13.39 | |
| 41 | 1 | 3 | Anahi Schreuders | Aruba | 1:15.14 | |
| 42 | 2 | 8 | Karen Mist Arngeirsdóttir | Iceland | 1:15.43 | |
| 43 | 6 | 1 | Camille Mallet | France | 1:16.12 | |
| 44 | 1 | 6 | Bibigul Menlibaeva | Uzbekistan | 1:16.75 | |
| 45 | 1 | 7 | Aishath Hulva Khulail | Maldives | 1:34.61 | |
| | 2 | 2 | Mera Abushammaleh | Palestine | DNS | |

### Semifinals

The semifinals were started on 9 October at 18:51.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Anastasia Makarova | Russia | 1:08.75 | Q |
| 2 | 1 | 3 | Kotryna Teterevkova | Lithuania | 1:08.80 | Q |
| 3 | 1 | 5 | Niamh Coyne | Ireland | 1:08.90 | Q |
| 4 | 2 | 3 | Anna Pirovano | Italy | 1:09.14 | Q |
| 5 | 2 | 6 | Hannah Brunzell | Sweden | 1:09.46 | Q |
| 6 | 2 | 5 | Shiori Asaba | Japan | 1:09.50 | Q |
| 7 | 2 | 8 | Agnė Šeleikaitė | Lithuania | 1:09.55 | Q |
| 8 | 1 | 4 | Mona McSharry | Ireland | 1:09.74 | Q |
| 9 | 2 | 2 | Weronika Hallmann | Poland | 1:10.06 | |
| 10 | 2 | 7 | Elena Guttmann | Austria | 1:10.43 | |
| 11 | 1 | 6 | Chelsea Hodges | Australia | 1:10.59 | |
| 12 | 1 | 7 | Julia Månsson | Sweden | 1:10.60 | |
| 13 | 1 | 2 | Avery Wiseman | Canada | 1:10.67 | |
| 14 | 2 | 1 | Tina Čelik | Slovenia | 1:10.77 | |
| 15 | 1 | 1 | Zheng Muyan | China | 1:10.78 | |
| 16 | 1 | 8 | Clara Basso-Bert | France | 1:12.71 | |

### Final

The final was held on 10 October at 18:39.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Anastasia Makarova | Russia | 1:07.88 |
| | 3 | Niamh Coyne | Ireland | 1:08.90 |
| | 5 | Kotryna Teterevkova | Lithuania | 1:08.95 |
| 4 | 8 | Mona McSharry | Ireland | 1:08.97 |
| 5 | 6 | Anna Pirovano | Italy | 1:09.16 |
| 6 | 2 | Hannah Brunzell | Sweden | 1:09.20 |
| 7 | 1 | Agnė Šeleikaitė | Lithuania | 1:09.40 |
| 8 | 7 | Shiori Asaba | Japan | 1:09.57 |