# Swimming at the 2024 World Aquatics Championships – Women's 100 metre backstroke

The Women's 100 metre backstroke competition at the 2024 World Aquatics Championships was held on 12 and 13 February 2024.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Kaylee McKeown (AUS) | 57.33 | Budapest, Hungary | 21 October 2023 |
| Competition record | Kaylee McKeown (AUS) | 57.53 | Fukuoka, Japan | 25 July 2023 |

## Results
### Heats

The heats were started on 12 February at 09:32.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 4 | Claire Curzan | United States | 59.72 | Q |
| 2 | 5 | 4 | Ingrid Wilm | Canada | 59.82 | Q |
| 3 | 4 | 3 | Iona Anderson | Australia | 59.88 | Q |
| 4 | 4 | 4 | Jaclyn Barclay | Australia | 1:00.05 | Q |
| 5 | 6 | 3 | Lauren Cox | Great Britain | 1:00.27 | Q |
| 6 | 4 | 6 | Kathleen Dawson | Great Britain | 1:00.36 | Q |
| 7 | 4 | 5 | Carmen Weiler | Spain | 1:00.44 | Q |
| 8 | 5 | 3 | Kira Toussaint | Netherlands | 1:00.50 | Q |
| 9 | 6 | 5 | Maaike de Waard | Netherlands | 1:00.61 | Q |
| 10 | 5 | 5 | Adela Piskorska | Poland | 1:01.03 | Q |
| 11 | 5 | 6 | Hanna Rosvall | Sweden | 1:01.20 | Q |
| 12 | 6 | 6 | Anastasiya Shkurdai | Neutral Independent Athletes | 1:01.43 | Q |
| 13 | 6 | 2 | Camila Rebelo | Portugal | 1:01.51 | Q |
| 14 | 6 | 7 | Francesca Pasquino | Italy | 1:01.54 | Q |
| 15 | 5 | 8 | Gabriela Georgieva | Bulgaria | 1:01.65 | Q |
| 16 | 4 | 2 | Stephanie Au | Hong Kong | 1:01.80 | Q |
| 17 | 4 | 0 | Carla González | Venezuela | 1:01.83 | |
| 18 | 5 | 2 | Paulina Peda | Poland | 1:01.87 | |
| 19 | 5 | 9 | Emma Harvey | Bermuda | 1:01.88 | NR |
| 20 | 4 | 7 | Maria Godden | Ireland | 1:01.99 | |
| 21 | 5 | 1 | Andrea Berrino | Argentina | 1:02.02 | |
| 22 | 6 | 9 | Jillian Crooks | Cayman Islands | 1:02.19 | |
| 23 | 5 | 0 | Chen Xin | China | 1:02.49 | |
| 24 | 4 | 8 | Levenia Sim | Singapore | 1:02.72 | |
| 25 | 6 | 1 | Song Jae-yun | South Korea | 1:02.74 | |
| 26 | 4 | 1 | Eszter Szabó-Feltóthy | Hungary | 1:02.80 | |
| 26 | 5 | 7 | Milla Drakopoulos | South Africa | 1:02.80 | |
| 28 | 6 | 8 | Teia Salvino | Philippines | 1:02.81 | |
| 29 | 6 | 0 | Xeniya Ignatova | Kazakhstan | 1:02.83 | |
| 30 | 3 | 4 | Jana Marković | Serbia | 1:03.70 | |
| 31 | 3 | 2 | Andrea Becali | Cuba | 1:04.22 | |
| 32 | 3 | 6 | Celina Márquez | El Salvador | 1:04.29 | |
| 33 | 3 | 7 | Valerie Tarazi | Palestine | 1:04.41 | |
| 33 | 4 | 9 | Alexia Sotomayor | Peru | 1:04.41 | |
| 35 | 3 | 1 | Natalia Zaiteva | Moldova | 1:04.50 | |
| 36 | 3 | 9 | Donata Katai | Zimbabwe | 1:04.51 | |
| 37 | 3 | 3 | Carolina Cermelli | Panama | 1:04.83 | |
| 38 | 3 | 0 | Ganga Senavirathne | Sri Lanka | 1:04.93 | |
| 39 | 2 | 4 | Suvana Chetana | India | 1:05.26 | |
| 40 | 2 | 2 | Ariuntamir Enkh-Amgalan | Mongolia | 1:05.27 | NR |
| 41 | 3 | 5 | Abril Aunchayna | Uruguay | 1:05.31 | |
| 42 | 3 | 8 | Masniari Wolf | Indonesia | 1:05.39 | |
| 43 | 2 | 3 | Gaurika Singh | Nepal | 1:05.47 | NR |
| 44 | 2 | 7 | Elizaveta Pecherskikh | Kyrgyzstan | 1:05.68 | |
| 45 | 2 | 5 | Amani Al-Obaidli | Bahrain | 1:06.06 | |
| 46 | 2 | 6 | Eda Zeqiri | Kosovo | 1:06.64 | |
| 47 | 1 | 4 | Idealy Tendrinavalona | Madagascar | 1:09.14 | |
| 48 | 2 | 8 | Alejandra Santana | Dominican Republic | 1:09.27 | |
| 49 | 2 | 0 | Chanchakriya Kheun | Cambodia | 1:09.31 | |
| 50 | 2 | 9 | Riley Miller | U.S. Virgin Islands | 1:09.47 | |
| 51 | 2 | 1 | Aynura Primova | Turkmenistan | 1:09.56 | |
| 52 | 1 | 5 | Angelina Smythe | Seychelles | 1:10.37 | |
| 53 | 1 | 7 | Maleek Al-Mukthar | Libya | 1:10.61 | |
| 54 | 1 | 6 | Natalia Ladha | Tanzania | 1:13.56 | |
| 55 | 1 | 3 | Jennifer Harding-Marlin | Saint Kitts and Nevis | 1:14.93 | |
| 56 | 1 | 2 | Hamna Ahmed | Maldives | 1:18.71 | |

### Semifinals

The semifinals were held on 12 February at 19:53.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Claire Curzan | United States | 58.73 | Q |
| 2 | 1 | 4 | Ingrid Wilm | Canada | 59.55 | Q |
| 3 | 1 | 5 | Jaclyn Barclay | Australia | 59.83 | Q |
| 4 | 2 | 5 | Iona Anderson | Australia | 59.94 | Q |
| 5 | 2 | 3 | Lauren Cox | Great Britain | 1:00.03 | Q |
| 6 | 1 | 6 | Kira Toussaint | Netherlands | 1:00.37 | Q |
| 7 | 1 | 3 | Kathleen Dawson | Great Britain | 1:00.40 | Q |
| 8 | 2 | 2 | Maaike de Waard | Netherlands | 1:00.68 | Q |
| 9 | 2 | 6 | Carmen Weiler | Spain | 1:00.81 | |
| 10 | 2 | 1 | Camila Rebelo | Portugal | 1:00.91 | |
| 11 | 1 | 2 | Adela Piskorska | Poland | 1:00.99 | |
| 12 | 1 | 7 | Anastasiya Shkurdai | Neutral Independent Athletes | 1:01.24 | |
| 13 | 2 | 8 | Gabriela Georgieva | Bulgaria | 1:01.42 | |
| 14 | 1 | 8 | Stephanie Au | Hong Kong | 1:01.50 | |
| 15 | 2 | 7 | Hanna Rosvall | Sweden | 1:01.67 | |
| 16 | 1 | 1 | Francesca Pasquino | Italy | 1:01.68 | |

### Final

The final were was on 13 February at 19:51.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Claire Curzan | United States | 58.29 |
| | 6 | Iona Anderson | Australia | 59.12 |
| | 5 | Ingrid Wilm | Canada | 59.18 |
| 4 | 3 | Jaclyn Barclay | Australia | 59.28 |
| 5 | 2 | Lauren Cox | Great Britain | 59.60 |
| 6 | 1 | Kathleen Dawson | Great Britain | 1:00.42 |
| 7 | 8 | Maaike de Waard | Netherlands | 1:00.64 |
| 8 | 7 | Kira Toussaint | Netherlands | 1:00.73 |