Swimming at the 2015 World Aquatics Championships – Women's 50 metre backstroke
The Women's 50 metre backstroke competition of the swimming events at the 2015 World Aquatics Championships was held on 5 August with the heats and the semifinals and 6 August with the final.Records
Prior to the competition, the existing world and championship records were as follows.Results
Heats
The heats were held on 5 August at 09:30.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | 4 | Fu Yuanhui | | 27.66 | Q |
| 2 | 6 | 4 | Etiene Medeiros | | 27.74 | Q |
| 3 | 5 | 4 | Emily Seebohm | | 27.75 | Q |
| 4 | 5 | 5 | Liu Xiang | | 27.79 | Q |
| 5 | 4 | 5 | Mie Nielsen | | 27.89 | Q |
| 6 | 6 | 5 | Lauren Quigley | | 27.94 | Q |
| 7 | 4 | 6 | Beryl Gastaldello | | 28.02 | Q, NR |
| 7 | 6 | 3 | Madison Wilson | | 28.02 | Q |
| 9 | 5 | 6 | Kirsty Coventry | | 28.15 | Q |
| 9 | 6 | 2 | Anastasia Fesikova | | 28.15 | Q |
| 11 | 6 | 6 | Elena Gemo | | 28.18 | Q |
| 12 | 6 | 0 | Theodora Drakou | | 28.35 | Q |
| 13 | 4 | 7 | Aleksandra Urbańczyk | | 28.36 | Q |
| 14 | 6 | 8 | Sanja Jovanović | | 28.40 | Q |
| 15 | 6 | 1 | Mathilde Cini | | 28.46 | Q |
| 16 | 5 | 2 | Daria Ustinova | | 28.52 | Q |
| 17 | 5 | 8 | Sviatlana Khakhlova | | 28.62 | |
| 18 | 5 | 0 | Katarína Listopadová | | 28.63 | |
| 19 | 5 | 9 | Dominique Bouchard | | 28.66 | |
| 20 | 5 | 3 | Yekaterina Rudenko | | 28.67 | |
| 20 | 5 | 1 | Simona Baumrtová | | 28.67 | |
| 22 | 6 | 9 | Stephanie Au | | 28.70 | |
| 23 | 4 | 0 | Eygló Ósk Gústafsdóttir | | 28.75 | |
| 24 | 5 | 7 | Park Han-byeol | | 28.85 | |
| 25 | 6 | 7 | Maaike de Waard | | 28.86 | |
| 26 | 4 | 1 | Alicja Tchórz | | 28.87 | |
| 27 | 3 | 5 | Gisela Morales | | 28.94 | |
| 28 | 4 | 8 | Daryna Zevina | | 28.97 | |
| 29 | 4 | 9 | Bobbie Gichard | | 29.15 | |
| 30 | 3 | 4 | Magdalena Kuras | | 29.33 | |
| 31 | 2 | 5 | Naomi Ruele | | 29.36 | |
| 32 | 3 | 6 | Yulduz Kuchkarova | | 29.37 | |
| 33 | 3 | 3 | Amit Ivry | | 29.50 | |
| 34 | 3 | 2 | Ekaterina Avramova | | 29.60 | |
| 35 | 3 | 0 | Carolina Colorado Henao | | 29.61 | |
| 36 | 3 | 7 | Sigrid Sepp | | 29.95 | |
| 37 | 3 | 9 | Chan Caroline Zi Xin | | 30.14 | |
| 38 | 2 | 4 | Jessika Cossa | | 30.17 | |
| 39 | 3 | 1 | Anak Ratih | | 30.33 | |
| 40 | 2 | 3 | Ariel Weech | | 30.77 | |
| 41 | 2 | 2 | Monica Ramírez | | 30.89 | |
| 42 | 3 | 8 | Andrea García | | 30.94 | |
| 43 | 2 | 7 | Evelina Afoa | | 31.74 | |
| 44 | 2 | 6 | Lauren Hew | | 32.33 | |
| 45 | 2 | 1 | Colleen Furgeson | | 33.04 | |
| 46 | 2 | 0 | Rita Zeqiri | | 33.65 | |
| 47 | 2 | 8 | Rahaf Baqleh | | 33.67 | |
| 48 | 2 | 9 | Debra Daniel | | 33.75 | |
| 49 | 1 | 4 | Yesui Bayar | | 35.44 | |
| 50 | 1 | 5 | Anastasiya Tyurina | | 38.48 | |
| 51 | 1 | 3 | | | 38.81 | |
| 52 | 1 | 6 | Fatema Abdulmohsen | | 40.40 | |
| 4 | 2 | Mimosa Jallow | | | |
| 4 | 3 | Rachel Bootsma | | | |
Semifinals
The semifinals were held at 17:42.Semifinal 1
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Etiene Medeiros | | 27.41 | Q |
| 2 | 5 | Liu Xiang | | 27.67 | Q |
| 3 | 6 | Madison Wilson | | 27.83 | Q |
| 4 | 3 | Lauren Quigley | | 27.88 | Q |
| 5 | 7 | Theodora Drakou | | 28.01 | Q, NR |
| 6 | 2 | Anastasia Fesikova | | 28.11 | |
| 7 | 8 | Daria Ustinova | | 28.39 | |
| 8 | 1 | Sanja Jovanović | | 28.59 | |
Semifinal 2
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Fu Yuanhui | | 27.18 | Q |
| 2 | 3 | Mie Nielsen | | 27.63 | Q, NR |
| 3 | 5 | Emily Seebohm | | 27.70 | Q |
| 4 | 8 | Mathilde Cini | | 28.16 | |
| 5 | 7 | Elena Gemo | | 28.21 | |
| 6 | 2 | Kirsty Coventry | | 28.28 | |
| 7 | 6 | Beryl Gastaldello | | 28.30 | |
| 8 | 1 | Aleksandra Urbańczyk | | 28.46 | |
Final
The final was held at 18:49.
| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Fu Yuanhui | | 27.11 | |
| 5 | Etiene Medeiros | | 27.26 | AM |
| 6 | Liu Xiang | | 27.58 | |
| 4 | 2 | Emily Seebohm | | 27.66 | |
| 5 | 3 | Mie Nielsen | | 27.73 | |
| 6 | 7 | Madison Wilson | | 27.92 | |
| 7 | 1 | Lauren Quigley | | 27.99 | |
| 8 | 8 | Theodora Drakou | | 28.17 | |
