# Swimming at the 2023 World Aquatics Championships – Women's 100 metre butterfly

The women's 100 metre butterfly competition at the 2023 World Aquatics Championships was held on 23 and 24 July 2023.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Sarah Sjöström (SWE) | 55.48 | Rio de Janeiro, Brazil | 7 August 2016 |
| Competition record | Sarah Sjöström (SWE) | 55.53 | Budapest, Hungary | 24 July 2017 |

## Results
### Heats

The heats were started on 23 July at 11:21.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 5 | Zhang Yufei | China | 56.89 | Q |
| 2 | 4 | 5 | Emma McKeon | Australia | 57.05 | Q |
| 3 | 5 | 6 | Angelina Köhler | Germany | 57.23 | Q |
| 4 | 5 | 3 | Louise Hansson | Sweden | 57.49 | Q |
| 5 | 5 | 5 | Maggie Mac Neil | Canada | 57.56 | Q |
| 6 | 5 | 4 | Torri Huske | United States | 57.66 | Q |
| 7 | 3 | 3 | Wang Yichun | China | 57.72 | Q |
| 8 | 3 | 4 | Gretchen Walsh | United States | 57.74 | Q |
| 9 | 4 | 3 | Brianna Throssell | Australia | 57.94 | Q |
| 10 | 4 | 6 | Lana Pudar | Bosnia and Herzegovina | 57.95 | Q |
| 11 | 4 | 4 | Marie Wattel | France | 58.02 | Q |
| 12 | 4 | 7 | Anna Ntountounaki | Greece | 58.12 | Q |
| 13 | 3 | 6 | Ai Soma | Japan | 58.17 | Q |
| 14 | 3 | 0 | Amina Kajtaz | Croatia | 58.50 | Q, NR |
| 15 | 4 | 8 | Helena Rosendahl Bach | Denmark | 58.55 | Q |
| 16 | 3 | 2 | Katerine Savard | Canada | 58.56 | Q |
| 17 | 4 | 2 | Rikako Ikee | Japan | 58.61 | |
| 18 | 4 | 1 | Ilaria Bianchi | Italy | 58.62 | |
| 19 | 5 | 2 | Farida Osman | Egypt | 59.09 | |
| 20 | 5 | 1 | Keanna Macinnes | Great Britain | 59.30 | |
| 21 | 3 | 1 | Paulina Peda | Poland | 59.34 | |
| 22 | 5 | 0 | Barbora Seemanová | Czech Republic | 59.36 | |
| 23 | 5 | 7 | Giovanna Diamante | Brazil | 59.39 | |
| 24 | 3 | 7 | Ellen Walshe | Ireland | 59.39 | |
| 25 | 3 | 8 | Quah Jing Wen | Singapore | 59.60 | |
| 26 | 5 | 8 | Hazel Ouwehand | New Zealand | 59.81 | |
| 27 | 4 | 0 | Paula Juste | Spain | 59.94 | |
| 28 | 3 | 9 | Park Su-jin | South Korea | 1:00.20 | |
| 29 | 2 | 3 | Trinity Hearne | South Africa | 1:00.27 | |
| 30 | 4 | 9 | Zsuzsanna Jakabos | Hungary | 1:00.51 | |
| 31 | 2 | 5 | Laura Lahtinen | Finland | 1:00.56 | |
| 32 | 5 | 9 | Athena Meneses | Mexico | 1:00.95 | |
| 33 | 2 | 4 | Luana Alonso | Paraguay | 1:01.16 | |
| 34 | 2 | 2 | Olivia Borg | Samoa | 1:01.80 | NR |
| 35 | 2 | 6 | Jasmine Alkhaldi | Suspended Member Federation | 1:01.94 | |
| 36 | 2 | 1 | Sabrina Lyn | Jamaica | 1:02.13 | |
| 37 | 1 | 4 | Varsenik Manucharyan | Armenia | 1:02.41 | NR |
| 38 | 1 | 5 | María Schutzmeier | Nicaragua | 1:02.56 | |
| 39 | 2 | 9 | Isabella Alas | El Salvador | 1:02.85 | |
| 40 | 2 | 7 | Oumy Diop | Senegal | 1:03.14 | |
| 41 | 1 | 8 | Felicity Passon | Seychelles | 1:03.15 | |
| 42 | 2 | 8 | Emily Muteti | Suspended Member Federation | 1:03.17 | |
| 43 | 2 | 0 | Julimar Ávila | Honduras | 1:03.52 | |
| 44 | 1 | 3 | Lia Ana Lima | Angola | 1:04.88 | |
| 45 | 1 | 6 | Adriana Giles | Bolivia | 1:05.70 | |
| 46 | 1 | 7 | Hayley Hoy | Eswatini | 1:09.14 | |
| 47 | 1 | 2 | Hayley Wong | Brunei | 1:09.52 | |
| 48 | 1 | 1 | Tara Naluwoza | Uganda | 1:09.69 | |
| 49 | 1 | 0 | Alyse Maniriho | Burundi | 1:29.91 | |

### Semifinals

The semifinals were started on 23 July at 20:12.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Zhang Yufei | China | 56.40 | Q |
| 2 | 1 | 3 | Torri Huske | United States | 56.76 | Q |
| 3 | 2 | 3 | Maggie Mac Neil | Canada | 56.78 | Q |
| 4 | 1 | 4 | Emma McKeon | Australia | 56.89 | Q |
| 5 | 2 | 5 | Angelina Köhler | Germany | 57.05 | Q, NR |
| 6 | 1 | 6 | Gretchen Walsh | United States | 57.14 | Q |
| 6 | 2 | 2 | Brianna Throssell | Australia | 57.14 | Q |
| 8 | 2 | 7 | Marie Wattel | France | 57.17 | Q |
| 9 | 1 | 5 | Louise Hansson | Sweden | 57.29 | |
| 10 | 1 | 2 | Lana Pudar | Bosnia and Herzegovina | 57.34 | |
| 11 | 2 | 6 | Wang Yichun | China | 57.74 | |
| 12 | 1 | 7 | Anna Ntountounaki | Greece | 57.97 | |
| 13 | 1 | 8 | Katerine Savard | Canada | 58.18 | |
| 14 | 2 | 1 | Ai Soma | Japan | 58.27 | |
| 15 | 1 | 1 | Amina Kajtaz | Croatia | 58.49 | NR |
| 16 | 2 | 8 | Helena Rosendahl Bach | Denmark | 58.54 | |

### Final

The final was held on 24 July at 20:09.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Zhang Yufei | China | 56.12 | |
| | 3 | Maggie Mac Neil | Canada | 56.45 | |
| | 5 | Torri Huske | United States | 56.61 | |
| 4 | 6 | Emma McKeon | Australia | 56.88 | |
| 5 | 2 | Angelina Köhler | Germany | 57.05 | =NR |
| 6 | 8 | Marie Wattel | France | 57.13 | |
| 7 | 1 | Brianna Throssell | Australia | 57.34 | |
| 8 | 7 | Gretchen Walsh | United States | 57.58 | |