# Swimming at the 2015 World Aquatics Championships – Women's 100 metre butterfly

The Women's 100 metre butterfly competition of the swimming events at the 2015 World Aquatics Championships was held on 2 August with the heats and the semifinals and 3 August with the final.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Dana Vollmer (USA) | 55.98 | London, Great Britain | 29 July 2012 |
| Competition record | Sarah Sjöström (SWE) | 56.06 | Rome, Italy | 27 July 2009 |
The following new records were set during this competition.
| Date | Event | Name | Nationality | Time | Record |
| 2 August | Semifinal 2 | Sarah Sjöström | Sweden | 55.74 | WR, CR |
| 3 August | Final | Sarah Sjöström | Sweden | 55.64 | WR, CR |

## Results
### Heats

The heats were held on 2 August at 09:30.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | Sarah Sjöström | Sweden | 56.47 | Q |
| 2 | 6 | 4 | Jeanette Ottesen | Denmark | 57.79 | Q |
| 3 | 5 | 5 | Inge Dekker | Netherlands | 57.82 | Q |
| 4 | 7 | 2 | Lu Ying | China | 57.84 | Q |
| 5 | 5 | 4 | Katerine Savard | Canada | 57.96 | Q |
| 6 | 6 | 7 | Alexandra Wenk | Germany | 58.05 | Q |
| 7 | 5 | 6 | Kendyl Stewart | United States | 58.06 | Q |
| 8 | 7 | 5 | Emma McKeon | Australia | 58.12 | Q |
| 9 | 7 | 1 | An Se-hyeon | South Korea | 58.24 | Q, NR |
| 10 | 6 | 5 | Madeline Groves | Australia | 58.31 | Q |
| 11 | 6 | 6 | Chen Xinyi | China | 58.34 | Q, =WJ |
| 12 | 7 | 7 | Noemie Thomas | Canada | 58.35 | Q |
| 13 | 7 | 8 | Kimberly Buys | Belgium | 58.36 | Q, NR |
| 14 | 6 | 3 | Ilaria Bianchi | Italy | 58.37 | Q |
| 15 | 7 | 0 | Natsumi Hoshi | Japan | 58.47 | Q |
| 16 | 5 | 3 | Rachael Kelly | Great Britain | 58.48 | QSO |
| 16 | 6 | 9 | Farida Osman | Egypt | 58.48 | QSO, NR |
| 18 | 5 | 1 | Daynara de Paula | Brazil | 58.59 | |
| 19 | 5 | 2 | Jemma Lowe | Great Britain | 58.74 | |
| 20 | 6 | 2 | Claire Donahue | United States | 58.77 | |
| 21 | 6 | 1 | Marie Wattel | France | 58.84 | |
| 22 | 6 | 8 | Katarína Listopadová | Slovakia | 58.87 | |
| 23 | 4 | 5 | Anna Ntountounaki | Greece | 58.90 | |
| 24 | 7 | 9 | Béryl Gastaldello | France | 59.06 | |
| 25 | 5 | 8 | Evelyn Verrasztó | Hungary | 59.09 | |
| 26 | 5 | 7 | Nataliya Lovtsova | Russia | 59.11 | |
| 27 | 5 | 9 | Danielle Villars | Switzerland | 59.21 | NR |
| 28 | 5 | 0 | Anna Polyakova | Russia | 59.42 | |
| 29 | 4 | 8 | Sze Hang Yu | Hong Kong | 59.72 | |
| 30 | 4 | 4 | Park Jin-young | South Korea | 59.74 | |
| 31 | 6 | 0 | Daiene Dias | Brazil | 59.75 | |
| 32 | 7 | 6 | Elena Di Liddo | Italy | 59.78 | |
| 33 | 4 | 3 | Judit Ignacio Sorribes | Spain | 59.87 | |
| 34 | 4 | 7 | Emilia Pikkarainen | Finland | 1:00.16 | |
| 34 | 4 | 1 | Lucie Svěcená | Czech Republic | 1:00.16 | |
| 36 | 4 | 9 | Quah Ting Wen | Singapore | 1:00.30 | |
| 37 | 3 | 4 | Jessica Camposano | Colombia | 1:00.42 | |
| 38 | 3 | 5 | Isabella Páez | Venezuela | 1:00.58 | NR |
| 39 | 4 | 0 | Nastja Govejšek | Slovenia | 1:01.15 | |
| 40 | 3 | 7 | Ana Monteiro | Portugal | 1:01.53 | |
| 41 | 3 | 3 | Marie Meza | Costa Rica | 1:01.59 | |
| 42 | 3 | 2 | Jasmine Al-Khaldi | Philippines | 1:02.37 | |
| 43 | 3 | 6 | Jóhanna Gústafsdóttir | Iceland | 1:02.43 | |
| 44 | 3 | 8 | Sotiria Neofytou | Cyprus | 1:02.83 | |
| 45 | 4 | 6 | Sharo Rodríguez | Mexico | 1:02.97 | |
| 46 | 4 | 2 | Laura Arroyo | Mexico | 1:03.18 | |
| 47 | 2 | 7 | Felicity Passon | Seychelles | 1:03.29 | |
| 48 | 3 | 9 | Amina Kajtaz | Bosnia and Herzegovina | 1:03.39 | |
| 49 | 1 | 4 | Noel Borshi | Albania | 1:03.65 | |
| 50 | 3 | 1 | Monalisa Lorenza | Indonesia | 1:03.85 | |
| 51 | 3 | 0 | Talita Baqlah | Jordan | 1:04.23 | |
| 52 | 2 | 5 | Jannah Sonnenschein | Mozambique | 1:04.48 | |
| 53 | 2 | 4 | Estefania Urzua | Chile | 1:04.64 | |
| 54 | 2 | 2 | Dalia Torrez Zamora | Nicaragua | 1:04.75 | |
| 55 | 2 | 1 | Emily Muteti | Kenya | 1:04.91 | |
| 56 | 2 | 6 | Caylee Watson | Virgin Islands | 1:05.70 | |
| 57 | 2 | 3 | Ana Nobrega | Angola | 1:05.84 | |
| 58 | 2 | 8 | Lara Butler | Cayman Islands | 1:06.10 | |
| 59 | 2 | 9 | Alsu Bayramova | Azerbaijan | 1:06.79 | |
| 60 | 1 | 3 | María Ribera | Bolivia | 1:07.09 | |
| 61 | 1 | 6 | Amarah Phillip | British Virgin Islands | 1:08.60 | |
| 62 | 1 | 5 | Tegan McCarthy | Papua New Guinea | 1:08.82 | |
| 63 | 2 | 0 | Choe Su-rim | North Korea | 1:08.98 | |
| 64 | 1 | 1 | Bo-Anne Bos | Curaçao | 1:12.43 | |
| 65 | 1 | 2 | Johanna Umurungi | Rwanda | 1:13.14 | |
| 66 | 1 | 0 | Dirngulbai Misech | Palau | 1:14.05 | |
| 67 | 1 | 7 | Nooran Ba Matraf | Yemen | 1:14.43 | |
| 68 | 1 | 9 | Charissa Panuve | Tonga | 1:16.48 | |
| 69 | 1 | 8 | Nada Arkaji | Qatar | 1:17.30 | |
| | 7 | 3 | Liliána Szilágyi | Hungary | DNS | |

### Swim-off

The swim-off was held at 11:56.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Rachael Kelly | Great Britain | 58.17 | Q |
| 2 | 5 | Farida Osman | Egypt | 58.22 | NR |

### Semifinals

The semifinals were held on 2 August at 17:32.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Jeanette Ottesen | Denmark | 57.04 | Q |
| 2 | 5 | Lu Ying | China | 57.36 | Q |
| 3 | 6 | Emma McKeon | Australia | 57.59 | Q |
| 4 | 3 | Alexandra Wenk | Germany | 57.77 | Q, NR |
| 5 | 7 | Noemie Thomas | Canada | 58.05 | QSO |
| 6 | 2 | Madeline Groves | Australia | 58.17 | |
| 7 | 8 | Rachael Kelly | Great Britain | 58.27 | |
| 8 | 1 | Ilaria Bianchi | Italy | 58.49 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Sarah Sjöström | Sweden | 55.74 | Q, WR |
| 2 | 3 | Katerine Savard | Canada | 57.52 | Q |
| 3 | 7 | Chen Xinyi | China | 57.63 | Q, WJ |
| 4 | 5 | Inge Dekker | Netherlands | 58.05 | QSO |
| 5 | 6 | Kendyl Stewart | United States | 58.14 | |
| 6 | 2 | An Se-hyeon | South Korea | 58.44 | |
| 7 | 8 | Natsumi Hoshi | Japan | 58.45 | |
| 8 | 1 | Kimberly Buys | Belgium | 59.08 | |

### Final

The final was held on 3 August at 17:40.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Sarah Sjöström | Sweden | 55.64 | WR |
| | 5 | Jeanette Ottesen | Denmark | 57.05 | |
| | 3 | Lu Ying | China | 57.48 | |
| 4 | 2 | Emma McKeon | Australia | 57.67 | |
| 5 | 6 | Katerine Savard | Canada | 57.69 | |
| 6 | 7 | Chen Xinyi | China | 57.85 | |
| 7 | 8 | Noemie Thomas | Canada | 57.94 | |
| 8 | 1 | Alexandra Wenk | Germany | 58.22 | |