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.The following new records were set during this competition.
| Date | Event | Name | Nationality | Time | Record |
| 7 August | Semifinal 2 | Sarah Sjöström | 25.06 | CR | |
| 8 August | Final | Sarah Sjöström | 24.96 | CR |
Results
Heats
The heats were held at 09:54| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | Sarah Sjöström | 25.43 | Q | |
| 2 | 5 | 4 | Jeanette Ottesen | 25.51 | Q | |
| 3 | 7 | 5 | Inge Dekker | 25.66 | Q | |
| 4 | 5 | 5 | Lu Ying | 25.69 | Q | |
| 5 | 6 | 4 | Fran Halsall | 25.86 | Q | |
| 6 | 6 | 3 | Arianna Vanderpool-Wallace | 26.02 | Q | |
| 7 | 6 | 6 | Elena Gemo | 26.07 | Q | |
| 7 | 7 | 6 | Kendyl Stewart | 26.07 | Q | |
| 9 | 6 | 7 | Anna Dowgiert | 26.24 | Q, NR | |
| 10 | 5 | 2 | Kimberly Buys | 26.28 | Q | |
| 11 | 6 | 5 | Silvia Di Pietro | 26.32 | Q | |
| 12 | 7 | 2 | Farida Osman | 26.33 | Q | |
| 12 | 7 | 7 | Mélanie Henique | 26.33 | Q | |
| 14 | 7 | 3 | Beryl Gastaldello | 26.46 | Q | |
| 14 | 7 | 1 | Noemie Thomas | 26.46 | Q | |
| 16 | 5 | 8 | Daynara de Paula | 26.49 | Q | |
| 17 | 6 | 2 | Claire Donahue | 26.52 | ||
| 18 | 7 | 8 | Nastja Govejšek | 26.54 | ||
| 19 | 6 | 1 | Rikako Ikee | 26.66 | ||
| 20 | 6 | 8 | Misaki Yamaguchi | 26.68 | ||
| 21 | 4 | 7 | Bryndis Hansen | 26.79 | NR | |
| 21 | 5 | 3 | Emma McKeon | 26.79 | ||
| 23 | 5 | 0 | Aleksandra Urbańczyk | 26.82 | ||
| 24 | 4 | 3 | Katarína Listopadová | 26.84 | ||
| 25 | 6 | 9 | Anna Ntountounaki | 26.85 | ||
| 26 | 4 | 0 | An Se-hyeon | 26.90 | ||
| 26 | 5 | 7 | Amit Ivry | 26.90 | ||
| 26 | 7 | 0 | Brianna Throssell | 26.90 | ||
| 29 | 5 | 1 | Katerine Savard | 26.93 | ||
| 30 | 4 | 8 | Sviatlana Khakhlova | 26.99 | ||
| 31 | 4 | 4 | Alia Atkinson | 27.01 | ||
| 31 | 5 | 9 | Lucie Svěcená | 27.01 | ||
| 33 | 4 | 2 | Sasha Touretski | 27.04 | NR | |
| 34 | 5 | 6 | Nataliya Lovtsova | 27.11 | ||
| 35 | 4 | 5 | Sze Hang Yu | 27.24 | ||
| 36 | 4 | 1 | Fanny Teijonsalo | 27.49 | ||
| 37 | 3 | 5 | Carolina Colorado Henao | 27.58 | ||
| 37 | 4 | 9 | Quah Ting Wen | 27.58 | ||
| 39 | 3 | 4 | Jeserik Pinto | 27.70 | ||
| 40 | 3 | 3 | Jasmine Al-Khaldi | 28.16 | ||
| 41 | 3 | 6 | Sotiria Neofytou | 28.25 | ||
| 42 | 3 | 2 | Amina Kajtaz | 28.32 | ||
| 43 | 7 | 9 | Laura Arroyo | 28.98 | ||
| 44 | 3 | 1 | Astri Foldarskar | 29.00 | ||
| 45 | 6 | 0 | Sharo Rodríguez | 29.13 | ||
| 46 | 2 | 3 | San Su Moe Theint | 29.21 | ||
| 47 | 3 | 9 | María Ribera | 29.22 | ||
| 48 | 3 | 7 | Elinah Phillip | 29.29 | ||
| 49 | 2 | 4 | Dalia Torrez Zamora | 29.31 | ||
| 50 | 3 | 8 | Choe Su-rim | 29.57 | ||
| 51 | 3 | 0 | Jannah Sonnenschein | 29.66 | ||
| 52 | 2 | 7 | Ann-Marie Hepler | 30.02 | ||
| 53 | 2 | 6 | Samantha Roberts | 30.16 | ||
| 54 | 2 | 5 | Chade Nersicio | 30.23 | ||
| 55 | 2 | 1 | Tegan McCarthy | 30.27 | ||
| 56 | 2 | 9 | Jamila Sanmoogan | 31.38 | ||
| 57 | 2 | 0 | Dirngulbai Misech | 31.70 | ||
| 58 | 2 | 8 | Irene Prescott | 31.90 | ||
| 59 | 1 | 4 | Rita Zeqiri | 32.12 | ||
| 60 | 1 | 3 | Sonia Aktar | 32.81 | ||
| 61 | 1 | 6 | Angel de Jesús | 33.86 | ||
| 62 | 1 | 5 | Rahel Gebresilassie | 36.15 | ||
| 63 | 2 | 2 | Fatoumata Samassékou | 36.31 | ||
| 64 | 1 | 2 | Alzain Tareq | 41.13 | ||
| 4 | 6 | Liliána Szilágyi | DNS |
Semifinals
The semifinals were held at 18:45.Semifinal 1
Semifinal 2
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Sarah Sjöström | 25.06 | Q, CR | |
| 2 | 3 | Fran Halsall | 25.71 | Q | |
| 3 | 5 | Inge Dekker | 25.90 | Q | |
| 4 | 2 | Anna Dowgiert | 25.91 | Q, NR | |
| 5 | 1 | Mélanie Henique | 26.03 | ||
| 6 | 6 | Elena Gemo | 26.11 | ||
| 7 | 7 | Silvia Di Pietro | 26.17 | ||
| 8 | 8 | Noemie Thomas | 26.37 |
Final
The final was held on 8 August at 17:32.| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Sarah Sjöström | 24.96 | CR | ||
| 5 | Jeanette Ottesen | 25.34 | |||
| 6 | Lu Ying | 25.37 | AS | ||
| 4 | 1 | Inge Dekker | 25.64 | ||
| 5 | 7 | Farida Osman | 25.78 | AF | |
| 6 | 3 | Fran Halsall | 25.85 | ||
| 7 | 2 | Arianna Vanderpool-Wallace | 25.93 | ||
| 8 | 8 | Anna Dowgiert | 26.20 |