# Swimming at the 2017 World Aquatics Championships – Women's 50 metre backstroke

The Women's 50 metre backstroke competition at the 2017 World Championships was held on 26 and 27 July 2017.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Zhao Jing (CHN) | 27.06 | Rome, Italy | 30 July 2009 |
| Competition record | Zhao Jing (CHN) | 27.06 | Rome, Italy | 30 July 2009 |

## Results
### Heats

The heats were held on 26 July at 09:30.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | Fu Yuanhui | China | 27.21 | Q |
| 2 | 6 | 4 | Aliaksandra Herasimenia | Belarus | 27.65 | Q |
| 2 | 6 | 5 | Etiene Medeiros | Brazil | 27.65 | Q |
| 4 | 7 | 6 | Georgia Davies | Great Britain | 27.73 | Q |
| 5 | 7 | 5 | Holly Barratt | Australia | 27.75 | Q |
| 6 | 5 | 4 | Wang Xueer | China | 27.85 | Q |
| 7 | 5 | 5 | Hannah Stevens | United States | 27.89 | Q |
| 8 | 6 | 6 | Emily Seebohm | Australia | 27.91 | Q |
| 9 | 6 | 3 | Kathleen Baker | United States | 27.94 | Q |
| 10 | 5 | 3 | Anastasia Fesikova | Russia | 27.96 | Q |
| 10 | 5 | 7 | Andrea Berrino | Argentina | 27.96 | Q, NR |
| 12 | 6 | 1 | Mimosa Jallow | Finland | 28.05 | Q, NR |
| 13 | 7 | 3 | Kylie Masse | Canada | 28.10 | Q |
| 14 | 4 | 4 | Alicja Tchórz | Poland | 28.13 | Q |
| 15 | 7 | 2 | Simona Baumrtová | Czech Republic | 28.15 | Q |
| 16 | 7 | 7 | Theodora Drakou | Greece | 28.22 | Q |
| 17 | 6 | 2 | Kira Toussaint | Netherlands | 28.30 | |
| 18 | 6 | 9 | Yu Hyoun-ji | South Korea | 28.31 | |
| 19 | 5 | 6 | Maaike de Waard | Netherlands | 28.42 | |
| 19 | 7 | 1 | Kathleen Dawson | Great Britain | 28.42 | |
| 21 | 6 | 7 | Ida Lindborg | Sweden | 28.44 | |
| 22 | 7 | 0 | Caroline Pilhatsch | Austria | 28.45 | |
| 23 | 5 | 2 | Gabrielle Fa'amausili | New Zealand | 28.47 | |
| 24 | 7 | 8 | Aleksandra Urbańczyk | Poland | 28.49 | |
| 25 | 5 | 0 | Park Han-byeol | South Korea | 28.52 | |
| 26 | 4 | 6 | Ingibjörg Jónsdóttir | Iceland | 28.53 | NR |
| 27 | 4 | 3 | Isabella Arcila | Colombia | 28.59 | |
| 28 | 4 | 5 | Fernanda González | Mexico | 28.67 | NR |
| 29 | 5 | 1 | Katarína Listopadová | Slovakia | 28.68 | |
| 30 | 5 | 8 | Daria Ustinova | Russia | 28.73 | |
| 31 | 6 | 8 | Daryna Zevina | Ukraine | 28.78 | |
| 32 | 7 | 9 | Mathilde Cini | France | 28.79 | |
| 33 | 4 | 2 | Sára Jóo | Hungary | 28.91 | |
| 34 | 6 | 0 | Ekaterina Avramova | Turkey | 29.11 | |
| 35 | 3 | 5 | Naomi Ruele | Botswana | 29.21 | NR |
| 36 | 3 | 4 | Sigrid Sepp | Estonia | 29.24 | |
| 37 | 4 | 8 | Toto Wong | Hong Kong | 29.27 | |
| 38 | 4 | 9 | Gabriela Georgieva | Bulgaria | 29.29 | |
| 39 | 4 | 0 | Chen Szu-chi | Chinese Taipei | 29.42 | |
| 40 | 4 | 7 | Jeserik Pinto | Venezuela | 29.50 | |
| 41 | 5 | 9 | Yekaterina Rudenko | Kazakhstan | 29.51 | |
| 42 | 3 | 6 | Lushavel Stickland | Samoa | 30.04 | |
| 43 | 3 | 3 | Felicity Passon | Seychelles | 30.32 | |
| 44 | 4 | 1 | Kristina Steina | Latvia | 30.36 | |
| 45 | 3 | 7 | Celina Marquez | El Salvador | 30.38 | |
| 46 | 3 | 2 | Kalia Antoniou | Cyprus | 30.59 | |
| 47 | 1 | 5 | Xiomara Getrouw | Suriname | 30.74 | |
| 48 | 3 | 8 | Hiba Fahsi | Morocco | 30.75 | |
| 49 | 3 | 9 | Carolina Cermelli | Panama | 30.77 | |
| 50 | 2 | 8 | Mónica Ramírez | Andorra | 30.96 | |
| 51 | 3 | 1 | Karen Vilorio | Honduras | 31.10 | |
| 52 | 2 | 4 | Elodie Marion Razafy | Madagascar | 31.26 | |
| 53 | 1 | 4 | María José Ribera | Bolivia | 31.53 | |
| 54 | 3 | 0 | Jennifer Rizkallah | Lebanon | 31.65 | |
| 55 | 2 | 5 | Rusudan Goginashvili | Georgia | 31.97 | |
| 56 | 2 | 7 | Catarina Sousa | Angola | 32.24 | |
| 57 | 1 | 3 | Britheny Joassaint | Haiti | 32.45 | |
| 58 | 2 | 9 | Gisela Cossa | Mozambique | 34.11 | |
| 59 | 2 | 3 | Gabby Gittens | Antigua and Barbuda | 34.16 | |
| 60 | 2 | 1 | Robyn Young | Eswatini | 35.46 | |
| 61 | 2 | 6 | Amanda Poppe | Guam | 35.64 | |
| 62 | 1 | 6 | Tayamika Chang'anamuno | Malawi | 37.87 | |
| 63 | 2 | 2 | Nazlati Mohamed Andhumdine | Comoros | 48.32 | |

### Semifinals

The semifinals were held on 26 July at 17:51.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | Georgia Davies | Great Britain | 27.49 | Q, NR |
| 2 | 6 | Emily Seebohm | Australia | 27.51 | Q |
| 3 | 4 | Aliaksandra Herasimenia | Belarus | 27.54 | Q |
| 4 | 3 | Wang Xueer | China | 27.60 | Q |
| 5 | 2 | Anastasia Fesikova | Russia | 27.65 | |
| 6 | 7 | Mimosa Jallow | Finland | 27.95 | NR |
| 7 | 8 | Theodora Drakou | Greece | 28.13 | |
| 7 | 1 | Alicja Tchórz | Poland | 28.13 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | Etiene Medeiros | Brazil | 27.18 | Q, AM |
| 2 | 4 | Fu Yuanhui | China | 27.19 | Q |
| 3 | 2 | Kathleen Baker | United States | 27.48 | Q, NR |
| 4 | 3 | Holly Barratt | Australia | 27.51 | Q |
| 5 | 6 | Hannah Stevens | United States | 27.63 | |
| 6 | 1 | Kylie Masse | Canada | 27.64 | NR |
| 7 | 7 | Andrea Berrino | Argentina | 27.80 | NR |
| 8 | 8 | Simona Baumrtová | Czech Republic | 28.03 | |

### Final

The final was held on 27 July at 18:06.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Etiene Medeiros | Brazil | 27.14 | AM |
| | 5 | Fu Yuanhui | China | 27.15 | |
| | 1 | Aliaksandra Herasimenia | Belarus | 27.23 | ER |
| 4 | 2 | Emily Seebohm | Australia | 27.37 | OC |
| 5 | 3 | Kathleen Baker | United States | 27.50 | |
| 6 | 8 | Wang Xueer | China | 27.55 | |
| 7 | 7 | Holly Barratt | Australia | 27.60 | |
| 8 | 6 | Georgia Davies | Great Britain | 27.61 | |