# Swimming at the 2015 World Aquatics Championships – Women's 50 metre butterfly

The Women's 50 metre butterfly competition of the swimming events at the 2015 World Aquatics Championships was held on 7 August with the heats and the semifinals and 8 August with the final.

## 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 | Therese Alshammar (SWE) | 25.07 | Rome, Italy | 31 July 2009 |
The following new records were set during this competition.
| Date | Event | Name | Nationality | Time | Record |
| 7 August | Semifinal 2 | Sarah Sjöström | Sweden | 25.06 | CR |
| 8 August | Final | Sarah Sjöström | Sweden | 24.96 | CR |

## Results
### Heats

The heats were held at 09:54
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | Sarah Sjöström | Sweden | 25.43 | Q |
| 2 | 5 | 4 | Jeanette Ottesen | Denmark | 25.51 | Q |
| 3 | 7 | 5 | Inge Dekker | Netherlands | 25.66 | Q |
| 4 | 5 | 5 | Lu Ying | China | 25.69 | Q |
| 5 | 6 | 4 | Fran Halsall | Great Britain | 25.86 | Q |
| 6 | 6 | 3 | Arianna Vanderpool-Wallace | Bahamas | 26.02 | Q |
| 7 | 6 | 6 | Elena Gemo | Italy | 26.07 | Q |
| 7 | 7 | 6 | Kendyl Stewart | United States | 26.07 | Q |
| 9 | 6 | 7 | Anna Dowgiert | Poland | 26.24 | Q, NR |
| 10 | 5 | 2 | Kimberly Buys | Belgium | 26.28 | Q |
| 11 | 6 | 5 | Silvia Di Pietro | Italy | 26.32 | Q |
| 12 | 7 | 2 | Farida Osman | Egypt | 26.33 | Q |
| 12 | 7 | 7 | Mélanie Henique | France | 26.33 | Q |
| 14 | 7 | 3 | Béryl Gastaldello | France | 26.46 | Q |
| 14 | 7 | 1 | Noemie Thomas | Canada | 26.46 | Q |
| 16 | 5 | 8 | Daynara de Paula | Brazil | 26.49 | Q |
| 17 | 6 | 2 | Claire Donahue | United States | 26.52 | |
| 18 | 7 | 8 | Nastja Govejšek | Slovenia | 26.54 | |
| 19 | 6 | 1 | Rikako Ikee | Japan | 26.66 | |
| 20 | 6 | 8 | Misaki Yamaguchi | Japan | 26.68 | |
| 21 | 4 | 7 | Bryndis Hansen | Iceland | 26.79 | NR |
| 21 | 5 | 3 | Emma McKeon | Australia | 26.79 | |
| 23 | 5 | 0 | Aleksandra Urbańczyk | Poland | 26.82 | |
| 24 | 4 | 3 | Katarína Listopadová | Slovakia | 26.84 | |
| 25 | 6 | 9 | Anna Ntountounaki | Greece | 26.85 | |
| 26 | 4 | 0 | An Se-hyeon | South Korea | 26.90 | |
| 26 | 5 | 7 | Amit Ivry | Israel | 26.90 | |
| 26 | 7 | 0 | Brianna Throssell | Australia | 26.90 | |
| 29 | 5 | 1 | Katerine Savard | Canada | 26.93 | |
| 30 | 4 | 8 | Sviatlana Khakhlova | Belarus | 26.99 | |
| 31 | 4 | 4 | Alia Atkinson | Jamaica | 27.01 | |
| 31 | 5 | 9 | Lucie Svěcená | Czech Republic | 27.01 | |
| 33 | 4 | 2 | Sasha Touretski | Switzerland | 27.04 | NR |
| 34 | 5 | 6 | Nataliya Lovtsova | Russia | 27.11 | |
| 35 | 4 | 5 | Sze Hang Yu | Hong Kong | 27.24 | |
| 36 | 4 | 1 | Fanny Teijonsalo | Finland | 27.49 | |
| 37 | 3 | 5 | Carolina Colorado Henao | Colombia | 27.58 | |
| 37 | 4 | 9 | Quah Ting Wen | Singapore | 27.58 | |
| 39 | 3 | 4 | Jeserik Pinto | Venezuela | 27.70 | |
| 40 | 3 | 3 | Jasmine Al-Khaldi | Philippines | 28.16 | |
| 41 | 3 | 6 | Sotiria Neofytou | Cyprus | 28.25 | |
| 42 | 3 | 2 | Amina Kajtaz | Bosnia and Herzegovina | 28.32 | |
| 43 | 7 | 9 | Laura Arroyo | Mexico | 28.98 | |
| 44 | 3 | 1 | Astri Foldarskar | Faroe Islands | 29.00 | |
| 45 | 6 | 0 | Sharo Rodríguez | Mexico | 29.13 | |
| 46 | 2 | 3 | San Su Moe Theint | Myanmar | 29.21 | |
| 47 | 3 | 9 | María Ribera | Bolivia | 29.22 | |
| 48 | 3 | 7 | Elinah Phillip | British Virgin Islands | 29.29 | |
| 49 | 2 | 4 | Dalia Torrez Zamora | Nicaragua | 29.31 | |
| 50 | 3 | 8 | Choe Su-rim | North Korea | 29.57 | |
| 51 | 3 | 0 | Jannah Sonnenschein | Mozambique | 29.66 | |
| 52 | 2 | 7 | Ann-Marie Hepler | Marshall Islands | 30.02 | |
| 53 | 2 | 6 | Samantha Roberts | Antigua and Barbuda | 30.16 | |
| 54 | 2 | 5 | Chade Nersicio | Curaçao | 30.23 | |
| 55 | 2 | 1 | Tegan McCarthy | Papua New Guinea | 30.27 | |
| 56 | 2 | 9 | Jamila Sanmoogan | Guyana | 31.38 | |
| 57 | 2 | 0 | Dirngulbai Misech | Palau | 31.70 | |
| 58 | 2 | 8 | Irene Prescott | Tonga | 31.90 | |
| 59 | 1 | 4 | Rita Zeqiri | Kosovo | 32.12 | |
| 60 | 1 | 3 | Sonia Aktar | Bangladesh | 32.81 | |
| 61 | 1 | 6 | Angel de Jesús | Northern Mariana Islands | 33.86 | |
| 62 | 1 | 5 | Rahel Gebresilassie | Ethiopia | 36.15 | |
| 63 | 2 | 2 | Fatoumata Samassékou | Mali | 36.31 | |
| 64 | 1 | 2 | Alzain Tareq | Bahrain | 41.13 | |
| | 4 | 6 | Liliána Szilágyi | Hungary | | DNS |

### Semifinals

The semifinals were held at 18:45.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Jeanette Ottesen | Denmark | 25.27 | Q |
| 2 | 5 | Lu Ying | China | 25.79 | Q |
| 3 | 3 | Arianna Vanderpool-Wallace | Bahamas | 25.81 | Q |
| 4 | 7 | Farida Osman | Egypt | 25.88 | Q, AF |
| 5 | 6 | Kendyl Stewart | United States | 25.93 | |
| 6 | 8 | Daynara de Paula | Brazil | 26.24 | |
| 7 | 1 | Béryl Gastaldello | France | 26.25 | |
| 8 | 2 | Kimberly Buys | Belgium | 26.43 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Sarah Sjöström | Sweden | 25.06 | Q, CR |
| 2 | 3 | Fran Halsall | Great Britain | 25.71 | Q |
| 3 | 5 | Inge Dekker | Netherlands | 25.90 | Q |
| 4 | 2 | Anna Dowgiert | Poland | 25.91 | Q, NR |
| 5 | 1 | Mélanie Henique | France | 26.03 | |
| 6 | 6 | Elena Gemo | Italy | 26.11 | |
| 7 | 7 | Silvia Di Pietro | Italy | 26.17 | |
| 8 | 8 | Noemie Thomas | Canada | 26.37 | |

### Final

The final was held on 8 August at 17:32.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Sarah Sjöström | Sweden | 24.96 | CR |
| | 5 | Jeanette Ottesen | Denmark | 25.34 | |
| | 6 | Lu Ying | China | 25.37 | AS |
| 4 | 1 | Inge Dekker | Netherlands | 25.64 | |
| 5 | 7 | Farida Osman | Egypt | 25.78 | AF |
| 6 | 3 | Fran Halsall | Great Britain | 25.85 | |
| 7 | 2 | Arianna Vanderpool-Wallace | Bahamas | 25.93 | |
| 8 | 8 | Anna Dowgiert | Poland | 26.20 | |