# Swimming at the 2023 World Aquatics Championships – Women's 50 metre backstroke

The women's 50 metre backstroke competition at the 2023 World Aquatics Championships was held on 26 and 27 July 2023.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Liu Xiang (CHN) | 26.98 | Jakarta, Indonesia | 21 August 2018 |
| Competition record | Zhao Jing (CHN) | 27.06 | Rome, Italy | 30 July 2009 |

## Results
### Heats

The heats were started on 26 July at 10:32.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 4 | Regan Smith | United States | 27.31 | Q |
| 2 | 5 | 4 | Kylie Masse | Canada | 27.48 | Q |
| 3 | 7 | 4 | Katharine Berkoff | United States | 27.56 | Q |
| 4 | 6 | 5 | Kaylee McKeown | Australia | 27.60 | Q |
| 5 | 7 | 2 | Mary-Ambre Moluh | France | 27.69 | Q |
| 6 | 5 | 5 | Ingrid Wilm | Canada | 27.75 | Q |
| 7 | 6 | 3 | Wan Letian | China | 27.84 | Q |
| 7 | 7 | 1 | Miki Takahashi | Japan | 27.84 | Q |
| 9 | 6 | 6 | Wang Xueer | China | 27.89 | Q |
| 10 | 5 | 3 | Maaike de Waard | Netherlands | 27.91 | Q |
| 11 | 7 | 6 | Lauren Cox | Great Britain | 27.98 | Q |
| 12 | 7 | 5 | Analia Pigrée | France | 28.01 | Q |
| 13 | 5 | 1 | Danielle Hill | Ireland | 28.03 | Q |
| 14 | 6 | 2 | Simona Kubová | Czech Republic | 28.14 | Q |
| 15 | 6 | 7 | Theodora Drakou | Greece | 28.20 | Q |
| 16 | 5 | 9 | Andrea Berrino | Argentina | 28.24 | Q |
| 17 | 5 | 8 | Lora Komoróczy | Hungary | 28.29 | |
| 18 | 7 | 7 | Adela Piskorska | Poland | 28.35 | |
| 19 | 5 | 0 | Lee Eun-ji | South Korea | 28.40 | |
| 19 | 6 | 1 | Paulina Peda | Poland | 28.40 | |
| 21 | 5 | 6 | Kira Toussaint | Netherlands | 28.41 | |
| 22 | 6 | 0 | Louise Hansson | Sweden | 28.42 | |
| 23 | 6 | 8 | Costanza Cocconcelli | Italy | 28.51 | |
| 24 | 7 | 9 | Carmen Weiler Sastre | Spain | 28.59 | |
| 25 | 7 | 0 | Margherita Panziera | Italy | 28.61 | |
| 26 | 4 | 4 | Ingeborg Løyning | Norway | 28.62 | |
| 27 | 6 | 9 | Stephanie Au | Hong Kong | 28.63 | |
| 28 | 4 | 2 | Camila Rebelo | Portugal | 28.65 | |
| 29 | 5 | 7 | Roos Vanotterdijk | Belgium | 28.69 | |
| 30 | 7 | 8 | Julie Kepp Jensen | Denmark | 28.77 | |
| 31 | 4 | 7 | Emma Harvey | Bermuda | 28.79 | |
| 32 | 4 | 6 | Tayde Sansores | Mexico | 28.91 | |
| 33 | 4 | 5 | Nina Kost | Switzerland | 29.00 | |
| 34 | 4 | 3 | Julia Góes | Brazil | 29.09 | |
| 35 | 4 | 0 | Xeniya Ignatova | Kazakhstan | 29.25 | |
| 36 | 3 | 4 | Wu Yi-en | Chinese Taipei | 29.28 | |
| 37 | 4 | 8 | Milla Drakopoulos | South Africa | 29.31 | |
| 38 | 4 | 1 | Saovanee Boonamphai | Thailand | 29.46 | |
| 39 | 3 | 2 | Elisabeth Erlendsdóttir | Faroe Islands | 29.94 | |
| 40 | 4 | 9 | Abril Aunchayna | Uruguay | 30.04 | |
| 41 | 3 | 5 | Alexia Sotomayor | Peru | 30.12 | |
| 42 | 2 | 9 | Mia Phiri | Zambia | 30.17 | NR |
| 43 | 3 | 6 | Donata Katai | Zimbabwe | 30.21 | |
| 44 | 3 | 3 | Mia Blaževska Eminova | North Macedonia | 30.41 | |
| 45 | 3 | 1 | Eda Zeqiri | Kosovo | 30.96 | |
| 46 | 3 | 7 | Marie Khoury | Lebanon | 31.14 | |
| 47 | 1 | 6 | Gaurika Singh | Nepal | 31.44 | |
| 48 | 3 | 8 | Nubia Adjei | Ghana | 31.61 | |
| 49 | 3 | 0 | Chanchakriya Kheum | Cambodia | 31.90 | |
| 50 | 2 | 4 | Denise Donelli | Mozambique | 32.39 | |
| 51 | 2 | 8 | Idealy Tendrinavalona | Madagascar | 32.41 | |
| 52 | 2 | 7 | Cheang Weng Lam | Macau | 32.48 | |
| 53 | 3 | 9 | Ariuntamir Enkh-Amgalan | Mongolia | 32.54 | |
| 54 | 2 | 0 | Shoko Litulumar | Northern Mariana Islands | 34.25 | |
| 55 | 1 | 4 | Ria Save | Tanzania | 34.71 | |
| 56 | 2 | 1 | Kayla Hepler | Marshall Islands | 34.73 | |
| 57 | 2 | 5 | Hamna Ahmed | Maldives | 35.11 | |
| 58 | 2 | 6 | Noelani Malia Day | Tonga | 35.37 | |
| 59 | 2 | 3 | Nafissath Radji | Benin | 35.40 | |
| 60 | 2 | 2 | Tayamika Chang'Anamuno | Malawi | 36.03 | |
| 61 | 1 | 3 | Rana Saadeldin | Sudan | 36.32 | NR |
| | 1 | 5 | Ruth Turay | Sierra Leone | Did not start | Did not start |
| | 5 | 2 | Anastasia Gorbenko | Israel | Did not start | Did not start |
| | 7 | 3 | Mollie O'Callaghan | Australia | Did not start | Did not start |

### Semifinals

The semifinals were started on 26 July at 20:36.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Regan Smith | United States | 27.10 | Q, AM |
| 2 | 1 | 5 | Kaylee McKeown | Australia | 27.26 | Q |
| 3 | 2 | 7 | Lauren Cox | Great Britain | 27.29 | Q |
| 4 | 1 | 4 | Kylie Masse | Canada | 27.49 | Q |
| 4 | 2 | 5 | Katharine Berkoff | United States | 27.49 | Q |
| 6 | 1 | 7 | Analia Pigrée | France | 27.70 | Q |
| 7 | 1 | 3 | Ingrid Wilm | Canada | 27.71 | Q |
| 8 | 2 | 2 | Wang Xueer | China | 27.74 | |
| 8 | 2 | 6 | Wan Letian | China | 27.74 | |
| 10 | 2 | 3 | Mary-Ambre Moluh | France | 27.82 | |
| 11 | 2 | 8 | Theodora Drakou | Greece | 27.87 | NR |
| 12 | 1 | 2 | Maaike de Waard | Netherlands | 28.03 | |
| 13 | 2 | 1 | Danielle Hill | Ireland | 28.10 | |
| 14 | 1 | 6 | Miki Takahashi | Japan | 28.13 | |
| 15 | 1 | 1 | Simona Kubová | Czech Republic | 28.16 | |
| 16 | 1 | 8 | Andrea Berrino | Argentina | 28.34 | |

#### Swim-off

The swim-off was held on 26 July at 22:14.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Wang Xueer | China | 27.78 | Q |
| 2 | 5 | Wan Letian | China | 27.90 | |

### Final

The final was held on 27 July at 20:36.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Kaylee McKeown | Australia | 27.08 | OC |
| | 4 | Regan Smith | United States | 27.11 | |
| | 6 | Lauren Cox | Great Britain | 27.20 | |
| 4 | 3 | Kylie Masse | Canada | 27.28 | |
| 5 | 2 | Katharine Berkoff | United States | 27.38 | |
| 6 | 1 | Ingrid Wilm | Canada | 27.41 | |
| 7 | 8 | Wang Xueer | China | 27.99 | |
| 8 | 7 | Analia Pigrée | France | 28.04 | |