# 2021 FINA World Swimming Championships (25 m) – Women's 50 metre butterfly

The Women's 50 metre butterfly competition of the 2021 FINA World Swimming Championships (25 m) was held on 19 and 20 December 2021.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Therese Alshammar (SWE) | 24.38 | Singapore | 22 November 2009 |
| Competition record | Ranomi Kromowidjojo (NED) | 24.47 | Hangzhou, China | 14 December 2018 |
The following new records were set during this competition:
| Date | Event | Name | Nation | Time | Record |
| 19 December | Final | Ranomi Kromowidjojo | Netherlands | 24.44 | CR |

## Results
### Heats

The heats were started on 18 December at 09:43.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | Sarah Sjöström | Sweden | 24.92 | Q |
| 2 | 6 | 4 | Ranomi Kromowidjojo | Netherlands | 24.97 | Q |
| 3 | 5 | 5 | Maaike de Waard | Netherlands | 25.12 | Q |
| 4 | 6 | 1 | Claire Curzan | United States | 25.17 | Q |
| 5 | 6 | 7 | Zhang Yufei | China | 25.20 | Q |
| 6 | 6 | 5 | Arina Surkova | Russian Swimming Federation | 25.33 | Q |
| 7 | 7 | 7 | Torri Huske | United States | 25.43 | Q |
| 8 | 7 | 2 | Farida Osman | Egypt | 25.60 | Q |
| 9 | 7 | 3 | Silvia Di Pietro | Italy | 25.64 | Q |
| 10 | 5 | 6 | Elena Di Liddo | Italy | 25.67 | Q |
| 10 | 7 | 5 | Holly Barratt | Australia | 25.67 | Q |
| 12 | 7 | 1 | Sara Junevik | Sweden | 25.69 | Q |
| 13 | 7 | 6 | Emilie Beckmann | Denmark | 25.75 | Q |
| 14 | 5 | 2 | Julie Kepp Jensen | Denmark | 25.76 | Q |
| 15 | 6 | 3 | Anna Ntountounaki | Greece | 25.81 | Q |
| 16 | 6 | 6 | Marie Wattel | France | 25.82 | Q |
| 17 | 5 | 9 | Jenjira Srisaard | Thailand | 26.19 | |
| 18 | 6 | 2 | Jeong So-eun | South Korea | 26.22 | |
| 18 | 7 | 9 | Giovanna Diamante | Brazil | 26.22 | |
| 20 | 5 | 1 | Anastasiya Kuliashova | Belarus | 26.26 | |
| 21 | 5 | 7 | Rozaliya Nasretdinova | Russian Swimming Federation | 26.28 | |
| 22 | 5 | 8 | Ellen Walshe | Ireland | 26.33 | |
| 23 | 6 | 8 | Lana Pudar | Bosnia and Herzegovina | 26.37 | |
| 24 | 5 | 0 | Jana Pavalić | Croatia | 26.47 | |
| 25 | 7 | 0 | Tayla Lovemore | South Africa | 26.78 | |
| 26 | 6 | 9 | Alexandra Touretski | Switzerland | 26.87 | |
| 27 | 4 | 5 | Chan Kin Lok | Hong Kong | 26.99 | |
| 28 | 4 | 1 | Nikol Merizaj | Albania | 27.03 | NR |
| 29 | 4 | 7 | Mariam Sheikhalizadeh | Azerbaijan | 27.32 | NR |
| 30 | 4 | 4 | Gabriela Ņikitina | Latvia | 27.45 | |
| 31 | 4 | 3 | Lillian Slušná | Slovakia | 27.49 | |
| 32 | 1 | 3 | María José Ribera | Bolivia | 27.55 | |
| 33 | 4 | 2 | Jasmine Alkhaldi | Philippines | 27.56 | |
| 34 | 3 | 4 | Elisabeth Timmer | Aruba | 27.58 | NR |
| 35 | 4 | 0 | Oumy Diop | Senegal | 27.66 | NR |
| 36 | 4 | 9 | María Schutzmeier | Nicaragua | 27.80 | |
| 37 | 4 | 8 | Zaneta Alvaranga | Jamaica | 27.93 | |
| 38 | 3 | 3 | Samantha Roberts | Antigua and Barbuda | 28.36 | NR |
| 39 | 3 | 2 | Varsenik Manucharyan | Armenia | 28.79 | |
| 40 | 3 | 5 | Cherelle Thompson | Trinidad and Tobago | 28.97 | |
| 41 | 3 | 7 | Antsa Rabejaona | Madagascar | 29.13 | |
| 42 | 3 | 6 | Mikaili Charlemagne | Saint Lucia | 29.16 | |
| 43 | 2 | 4 | Khuyagbaataryn Enkhzul | Mongolia | 29.34 | |
| 44 | 3 | 8 | Nubia Adjei | Ghana | 29.63 | |
| 45 | 2 | 5 | Avice Meya | Uganda | 29.90 | |
| 46 | 1 | 7 | Mst Sonia Khatun | Bangladesh | 30.13 | |
| 47 | 2 | 6 | Khema Elizabeth | Seychelles | 30.30 | |
| 48 | 2 | 3 | Dirngulbai Misech | Palau | 30.60 | |
| 49 | 3 | 0 | Ayah Binrajab | Bahrain | 30.65 | |
| 50 | 2 | 9 | Muynin Kaing | Cambodia | 30.77 | NR |
| 50 | 3 | 9 | Denise Donelli | Mozambique | 30.77 | |
| 52 | 2 | 1 | Taffi Illis | Sint Maarten | 31.99 | |
| 53 | 1 | 4 | Daniella Nafal | Palestine | 32.07 | |
| 54 | 1 | 5 | Kayla Hepler | Marshall Islands | 32.46 | |
| 55 | 1 | 6 | Sophie Beth Taylor | Turks and Caicos Islands | 32.78 | |
| 56 | 2 | 2 | Jessica Makwenda | Malawi | 34.07 | |
| 57 | 2 | 7 | Tity Dumbuya | Sierra Leone | 34.79 | |
| 58 | 2 | 8 | Rahel Gebresilassie | Ethiopia | 36.34 | |
| 59 | 2 | 0 | Alia Ishimwe | Burundi | 37.62 | |
| 60 | 1 | 2 | Grace Nguelo'o | Cameroon | 38.37 | |
| | 3 | 1 | Timipame-ere Akiayefa | Nigeria | DNS | |
| | 4 | 6 | Marina Chan | Singapore | DNS | |
| | 5 | 3 | Maggie Mac Neil | Canada | DNS | |
| | 5 | 4 | Béryl Gastaldello | France | DNS | |
| | 6 | 0 | Barbora Seemanová | Czech Republic | DNS | |
| | 7 | 8 | Kylie Masse | Canada | DNS | |

### Semifinals

The semifinals were started on 18 December at 18:46.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 4 | Ranomi Kromowidjojo | Netherlands | 24.61 | Q |
| 2 | 2 | 4 | Sarah Sjöström | Sweden | 24.94 | Q |
| 3 | 2 | 3 | Zhang Yufei | China | 24.97 | Q, NR |
| 4 | 2 | 5 | Maaike de Waard | Netherlands | 25.19 | Q |
| 5 | 1 | 3 | Arina Surkova | Russian Swimming Federation | 25.20 | Q |
| 5 | 1 | 5 | Claire Curzan | United States | 25.20 | Q |
| 5 | 2 | 6 | Torri Huske | United States | 25.20 | Q |
| 8 | 2 | 2 | Silvia Di Pietro | Italy | 25.25 | Q |
| 9 | 1 | 1 | Julie Kepp Jensen | Denmark | 25.31 | |
| 10 | 2 | 8 | Anna Ntountounaki | Greece | 25.36 | |
| 11 | 1 | 6 | Farida Osman | Egypt | 25.49 | |
| 11 | 2 | 1 | Emilie Beckmann | Denmark | 25.49 | |
| 13 | 1 | 2 | Elena Di Liddo | Italy | 25.54 | |
| 14 | 2 | 7 | Holly Barratt | Australia | 25.63 | |
| 15 | 1 | 7 | Sara Junevik | Sweden | 25.68 | |
| 16 | 1 | 8 | Marie Wattel | France | 25.81 | |

### Final

The final was held on 19 December at 18:06.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Ranomi Kromowidjojo | Netherlands | 24.44 | CR, NR |
| | 5 | Sarah Sjöström | Sweden | 24.51 | |
| | 7 | Claire Curzan | United States | 24.55 | AM, WJ |
| 4 | 1 | Torri Huske | United States | 24.88 | |
| 5 | 3 | Zhang Yufei | China | 24.91 | NR |
| 6 | 6 | Maaike de Waard | Netherlands | 25.12 | |
| 7 | 8 | Silvia Di Pietro | Italy | 25.26 | |
| 8 | 2 | Arina Surkova | Russian Swimming Federation | 25.29 | |