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.
The following new records were set during this competition.
| Date | Event | Name | Nationality | Time | Record |
| 2 August | Semifinal 2 | Sarah Sjöström | | 55.74 | , CR |
| 3 August | Final | Sarah Sjöström | | 55.64 | , 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 | | | Q |
| 2 | 6 | 4 | Jeanette Ottesen | | | Q |
| 3 | 5 | 5 | Inge Dekker | | | Q |
| 4 | 7 | 2 | Lu Ying | | | Q |
| 5 | 5 | 4 | Katerine Savard | | | Q |
| 6 | 6 | 7 | Alexandra Wenk | | | Q |
| 7 | 5 | 6 | Kendyl Stewart | | | Q |
| 8 | 7 | 5 | Emma McKeon | | | Q |
| 9 | 7 | 1 | An Se-hyeon | | | Q, NR |
| 10 | 6 | 5 | Madeline Groves | | | Q |
| 11 | 6 | 6 | Chen Xinyi | | | Q, =WJ |
| 12 | 7 | 7 | Noemie Thomas | | | Q |
| 13 | 7 | 8 | Kimberly Buys | | | Q, NR |
| 14 | 6 | 3 | Ilaria Bianchi | | | Q |
| 15 | 7 | 0 | Natsumi Hoshi | | | Q |
| 16 | 5 | 3 | Rachael Kelly | | | |
| 16 | 6 | 9 | Farida Osman | | | , NR |
| 18 | 5 | 1 | Daynara de Paula | | | |
| 19 | 5 | 2 | Jemma Lowe | | | |
| 20 | 6 | 2 | Claire Donahue | | | |
| 21 | 6 | 1 | Marie Wattel | | | |
| 22 | 6 | 8 | Katarína Listopadová | | | |
| 23 | 4 | 5 | Anna Ntountounaki | | | |
| 24 | 7 | 9 | Beryl Gastaldello | | | |
| 25 | 5 | 8 | Evelyn Verrasztó | | | |
| 26 | 5 | 7 | Nataliya Lovtsova | | | |
| 27 | 5 | 9 | Danielle Villars | | | NR |
| 28 | 5 | 0 | Anna Polyakova | | | |
| 29 | 4 | 8 | Sze Hang Yu | | | |
| 30 | 4 | 4 | Park Jin-young | | | |
| 31 | 6 | 0 | Daiene Dias | | | |
| 32 | 7 | 6 | Elena Di Liddo | | | |
| 33 | 4 | 3 | Judit Ignacio Sorribes | | | |
| 34 | 4 | 7 | Emilia Pikkarainen | | 1:00.16 | |
| 34 | 4 | 1 | Lucie Svěcená | | 1:00.16 | |
| 36 | 4 | 9 | Quah Ting Wen | | 1:00.30 | |
| 37 | 3 | 4 | Jessica Camposano | | 1:00.42 | |
| 38 | 3 | 5 | Isabella Páez | | 1:00.58 | NR |
| 39 | 4 | 0 | Nastja Govejšek | | 1:01.15 | |
| 40 | 3 | 7 | Ana Monteiro | | 1:01.53 | |
| 41 | 3 | 3 | Marie Meza | | 1:01.59 | |
| 42 | 3 | 2 | Jasmine Al-Khaldi | | 1:02.37 | |
| 43 | 3 | 6 | Jóhanna Gústafsdóttir | | 1:02.43 | |
| 44 | 3 | 8 | Sotiria Neofytou | | 1:02.83 | |
| 45 | 4 | 6 | Sharo Rodríguez | | 1:02.97 | |
| 46 | 4 | 2 | Laura Arroyo | | 1:03.18 | |
| 47 | 2 | 7 | Felicity Passon | | 1:03.29 | |
| 48 | 3 | 9 | Amina Kajtaz | | 1:03.39 | |
| 49 | 1 | 4 | Noel Borshi | | 1:03.65 | |
| 50 | 3 | 1 | Monalisa Lorenza | | 1:03.85 | |
| 51 | 3 | 0 | Talita Baqlah | | 1:04.23 | |
| 52 | 2 | 5 | Jannah Sonnenschein | | 1:04.48 | |
| 53 | 2 | 4 | Estefania Urzua | | 1:04.64 | |
| 54 | 2 | 2 | Dalia Torrez Zamora | | 1:04.75 | |
| 55 | 2 | 1 | Emily Muteti | | 1:04.91 | |
| 56 | 2 | 6 | Caylee Watson | | 1:05.70 | |
| 57 | 2 | 3 | Ana Nobrega | | 1:05.84 | |
| 58 | 2 | 8 | Lara Butler | | 1:06.10 | |
| 59 | 2 | 9 | Alsu Bayramova | | 1:06.79 | |
| 60 | 1 | 3 | María Ribera | | 1:07.09 | |
| 61 | 1 | 6 | Amarah Phillip | | 1:08.60 | |
| 62 | 1 | 5 | Tegan McCarthy | | 1:08.82 | |
| 63 | 2 | 0 | Choe Su-rim | | 1:08.98 | |
| 64 | 1 | 1 | Bo-Anne Bos | | 1:12.43 | |
| 65 | 1 | 2 | Johanna Umurungi | | 1:13.14 | |
| 66 | 1 | 0 | Dirngulbai Misech | | 1:14.05 | |
| 67 | 1 | 7 | Nooran Ba Matraf | | 1:14.43 | |
| 68 | 1 | 9 | Charissa Panuve | | 1:16.48 | |
| 69 | 1 | 8 | Nada Arkaji | | 1:17.30 | |
| 7 | 3 | Liliána Szilágyi | | | |
Swim-off
The swim-off was held at 11:56.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Rachael Kelly | | 58.17 | Q |
| 2 | 5 | Farida Osman | | 58.22 | NR |
Semifinals
The semifinals were held on 2 August at 17:32.Semifinal 1
Semifinal 2
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Sarah Sjöström | | 55.74 | Q, |
| 2 | 3 | Katerine Savard | | 57.52 | Q |
| 3 | 7 | Chen Xinyi | | 57.63 | Q, WJ |
| 4 | 5 | Inge Dekker | | 58.05 | |
| 5 | 6 | Kendyl Stewart | | 58.14 | |
| 6 | 2 | An Se-hyeon | | 58.44 | |
| 7 | 8 | Natsumi Hoshi | | 58.45 | |
| 8 | 1 | Kimberly Buys | | 59.08 | |
Final
The final was held on 3 August at 17:40.
| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Sarah Sjöström | | 55.64 | |
| 5 | Jeanette Ottesen | | 57.05 | |
| 3 | Lu Ying | | 57.48 | |
| 4 | 2 | Emma McKeon | | 57.67 | |
| 5 | 6 | Katerine Savard | | 57.69 | |
| 6 | 7 | Chen Xinyi | | 57.85 | |
| 7 | 8 | Noemie Thomas | | 57.94 | |
| 8 | 1 | Alexandra Wenk | | 58.22 | |
