# Swimming at the 2019 World Aquatics Championships – Women's 50 metre butterfly

The Women's 50 metre butterfly competition at the 2019 World Championships was held on 26 and 27 July 2019.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Sarah Sjöström (SWE) | 24.43 | Borås, Sweden | 5 July 2014 |
| Competition record | Sarah Sjöström (SWE) | 24.60 | Budapest, Hungary | 29 July 2017 |

## Results
### Heats

The heats were held on 26 July at 11:11.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | Sarah Sjöström | Sweden | 25.39 | Q |
| 2 | 6 | 4 | Kelsi Dahlia | United States | 25.70 | Q |
| 3 | 5 | 4 | Farida Osman | Egypt | 25.71 | Q |
| 4 | 5 | 3 | Penny Oleksiak | Canada | 25.73 | Q |
| 5 | 7 | 5 | Ranomi Kromowidjojo | Netherlands | 25.86 | Q |
| 6 | 7 | 3 | Louise Hansson | Sweden | 25.97 | Q |
| 7 | 6 | 2 | Elena Di Liddo | Italy | 26.03 | Q |
| 8 | 7 | 6 | Marie Wattel | France | 26.07 | Q |
| 9 | 7 | 2 | Jeanette Ottesen | Denmark | 26.09 | Q |
| 10 | 6 | 6 | Wang Yichun | China | 26.13 | Q |
| 11 | 5 | 2 | Maggie MacNeil | Canada | 26.14 | Q |
| 11 | 6 | 1 | Zhang Yufei | China | 26.14 | Q |
| 11 | 7 | 0 | Brianna Throssell | Australia | 26.14 | Q |
| 14 | 5 | 5 | Kimberly Buys | Belgium | 26.23 | Q |
| 15 | 6 | 7 | Anna Ntountounaki | Greece | 26.26 | Q |
| 16 | 6 | 3 | Arina Surkova | Russia | 26.32 | QSO |
| 16 | 6 | 5 | Emilie Beckmann | Denmark | 26.32 | QSO |
| 18 | 5 | 6 | Maaike de Waard | Netherlands | 26.40 | |
| 19 | 7 | 1 | Erin Gallagher | South Africa | 26.45 | |
| 20 | 5 | 7 | Mimosa Jallow | Finland | 26.62 | |
| 21 | 5 | 1 | Svetlana Chimrova | Russia | 26.64 | |
| 22 | 6 | 8 | Angelina Köhler | Germany | 26.65 | |
| 23 | 4 | 5 | Anastasia Gorbenko | Israel | 26.70 | |
| 24 | 7 | 8 | Park Ye-rin | South Korea | 26.75 | |
| 25 | 5 | 9 | Huang Mei-chien | Chinese Taipei | 26.89 | |
| 25 | 7 | 7 | Alexandra Touretski | Switzerland | 26.89 | |
| 27 | 5 | 0 | Quah Ting Wen | Singapore | 26.92 | |
| 28 | 4 | 2 | Jenjira Srisaard | Thailand | 26.93 | NR |
| 29 | 6 | 0 | Beatrix Bordás | Hungary | 26.98 | |
| 30 | 6 | 9 | Aleyna Özkan | Turkey | 27.00 | |
| 31 | 4 | 4 | Sirena Rowe | Colombia | 27.02 | |
| 32 | 4 | 7 | Paulina Nogaj | Poland | 27.08 | |
| 33 | 4 | 3 | Chan Kin Lok | Hong Kong | 27.17 | |
| 34 | 4 | 6 | Gabriela Ņikitina | Latvia | 27.48 | |
| 34 | 7 | 9 | Anicka Delgado | Ecuador | 27.48 | |
| 36 | 5 | 8 | Alia Atkinson | Jamaica | 27.49 | |
| 37 | 4 | 1 | Alexandra Schegoleva | Cyprus | 27.74 | |
| 38 | 4 | 0 | Maddy Moore | Bermuda | 28.02 | |
| 39 | 1 | 3 | Alexis Margett | Bolivia | 28.21 | |
| 40 | 4 | 9 | Maria Schutzmeier | Nicaragua | 28.34 | |
| 41 | 4 | 8 | Chade Nersicio | Curaçao | 28.45 | |
| 42 | 3 | 3 | Mikaili Charlemagne | Saint Lucia | 29.24 | |
| 43 | 2 | 7 | Varsenik Manucharyan | Armenia | 29.65 | |
| 44 | 2 | 8 | Sophia Diagne | Senegal | 29.90 | |
| 45 | 3 | 1 | Georgia-Leigh Vele | Papua New Guinea | 30.07 | |
| 46 | 3 | 7 | Aaliyah Palestrini | Seychelles | 30.18 | |
| 47 | 3 | 6 | Jamila Sanmoogan | Guyana | 30.21 | |
| 48 | 3 | 4 | Elodie Poo-cheong | Mauritius | 30.26 | |
| 49 | 3 | 5 | Aniqah Gaffoor | Sri Lanka | 30.36 | |
| 50 | 3 | 2 | Ann-Marie Hepler | Marshall Islands | 30.77 | |
| 51 | 1 | 6 | Enkhzul Khuyagbaatar | Mongolia | 30.80 | |
| 52 | 3 | 8 | Olivia Fuller | Antigua and Barbuda | 30.88 | |
| 53 | 2 | 1 | Dirngulbai Misech | Palau | 31.14 | |
| 54 | 1 | 4 | Taffi Illis | Sint Maarten | 31.33 | |
| 55 | 2 | 5 | Sofia Shah | Nepal | 32.04 | |
| 56 | 2 | 2 | Hemthon Vitiny | Cambodia | 32.38 | |
| 57 | 2 | 0 | Selina Katumba | Uganda | 32.77 | |
| 58 | 3 | 0 | Anastasiya Tyurina | Tajikistan | 33.17 | |
| 59 | 1 | 5 | Aika Watanabe | Northern Mariana Islands | 33.43 | |
| 60 | 2 | 4 | Dania Nour | Palestine | 34.30 | |
| 61 | 3 | 9 | Domingas Munhemeze | Mozambique | 34.53 | |
| 62 | 2 | 9 | Lucie Kouadio-Patinier | Ivory Coast | 35.43 | |
| 63 | 2 | 3 | Rahel Gebresilassie | Ethiopia | 36.37 | |
| 64 | 2 | 6 | Tity Dumbuya | Sierra Leone | 37.90 | |

### Swim-off

The swim-off was held on 26 July at 12:02.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Arina Surkova | Russia | 26.13 | Q |
| 2 | 5 | Emilie Beckmann | Denmark | 26.24 | |

### Semifinals

The semifinals were held on 26 July at 21:09.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | Marie Wattel | France | 25.56 | Q, NR |
| 2 | 4 | Kelsi Dahlia | United States | 25.59 | Q |
| 3 | 5 | Penny Oleksiak | Canada | 25.93 | Q |
| 4 | 8 | Arina Surkova | Russia | 26.06 | |
| 5 | 3 | Louise Hansson | Sweden | 26.10 | |
| 6 | 7 | Zhang Yufei | China | 26.18 | |
| 7 | 2 | Wang Yichun | China | 26.21 | |
| 8 | 1 | Kimberly Buys | Belgium | 26.51 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Sarah Sjöström | Sweden | 24.79 | Q |
| 2 | 3 | Ranomi Kromowidjojo | Netherlands | 25.54 | Q |
| 3 | 5 | Farida Osman | Egypt | 25.79 | Q |
| 4 | 1 | Brianna Throssell | Australia | 25.93 | Q |
| 5 | 2 | Jeanette Ottesen | Denmark | 26.01 | Q |
| 6 | 6 | Elena Di Liddo | Italy | 26.16 | |
| 7 | 7 | Maggie MacNeil | Canada | 26.28 | |
| 8 | 8 | Anna Ntountounaki | Greece | 26.31 | |

### Final

The final was started on 27 July at 20:02.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Sarah Sjöström | Sweden | 25.02 | |
| | 5 | Ranomi Kromowidjojo | Netherlands | 25.35 | |
| | 2 | Farida Osman | Egypt | 25.47 | |
| 4 | 6 | Kelsi Dahlia | United States | 25.48 | =AM |
| 5 | 3 | Marie Wattel | France | 25.50 | NR |
| 6 | 7 | Penny Oleksiak | Canada | 25.69 | |
| 7 | 8 | Jeanette Ottesen | Denmark | 25.76 | |
| 8 | 1 | Brianna Throssell | Australia | 26.11 | |