# Swimming at the 2023 World Aquatics Championships – Women's 100 metre freestyle

The women's 100 metre freestyle competition at the 2023 World Aquatics Championships was held on 27 and 28 July 2023.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Sarah Sjöström (SWE) | 51.71 | Budapest, Hungary | 23 July 2017 |
| Competition record | Sarah Sjöström (SWE) | 51.71 | Budapest, Hungary | 23 July 2017 |

## Results
### Heats

The heats were started on 27 July at 10:32.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | Siobhán Haughey | Hong Kong | 53.15 | Q |
| 2 | 8 | 5 | Abbey Weitzeil | United States | 53.25 | Q |
| 3 | 6 | 4 | Emma McKeon | Australia | 53.40 | Q |
| 4 | 7 | 3 | Marie Wattel | France | 53.59 | Q |
| 5 | 6 | 2 | Michelle Coleman | Sweden | 53.72 | Q |
| 6 | 6 | 5 | Marrit Steenbergen | Netherlands | 53.82 | Q |
| 7 | 8 | 4 | Mollie O'Callaghan | Australia | 54.01 | Q |
| 8 | 8 | 3 | Cheng Yujie | China | 54.11 | Q |
| 9 | 6 | 6 | Stephanie Balduccini | Brazil | 54.15 | Q |
| 10 | 6 | 3 | Beryl Gastaldello | France | 54.16 | Q |
| 11 | 8 | 5 | Kate Douglass | United States | 54.41 | Q |
| 12 | 8 | 6 | Yang Junxuan | China | 54.45 | Q |
| 13 | 7 | 8 | Sofia Morini | Italy | 54.50 | Q |
| 14 | 6 | 1 | Aimee Canny | South Africa | 54.60 | Q |
| 15 | 8 | 2 | Signe Bro | Denmark | 54.61 | Q |
| 16 | 7 | 6 | Rikako Ikee | Japan | 54.67 | Q |
| 17 | 6 | 8 | Snæfríður Jórunnardóttir | Iceland | 54.74 | NR |
| 17 | 7 | 2 | Kalia Antoniou | Cyprus | 54.74 | |
| 19 | 6 | 7 | Kornelia Fiedkiewicz | Poland | 54.82 | |
| 20 | 8 | 8 | Hur Yeon-kyung | South Korea | 54.97 | |
| 21 | 7 | 1 | Barbora Seemanová | Czech Republic | 55.04 | |
| 22 | 8 | 7 | Janja Šegel | Slovenia | 55.17 | |
| 23 | 5 | 5 | Jillian Crooks | Cayman Islands | 55.32 | NR |
| 24 | 6 | 0 | Elisbet Gámez | Cuba | 55.40 | |
| 25 | 7 | 0 | Carmen Weiler Sastre | Spain | 55.46 | |
| 26 | 8 | 0 | Victoria Catterson | Ireland | 55.56 | |
| 27 | 5 | 3 | Anicka Delgado | Ecuador | 55.57 | |
| 28 | 8 | 1 | Roos Vanotterdijk | Belgium | 55.89 | |
| 29 | 8 | 9 | Chelsey Edwards | New Zealand | 56.04 | |
| 30 | 5 | 4 | Teresa Ivan | Slovakia | 56.16 | |
| 31 | 6 | 9 | Quah Ting Wen | Singapore | 56.52 | |
| 32 | 7 | 9 | Nina Kost | Switzerland | 56.60 | |
| 33 | 5 | 2 | Inés Marín | Chile | 56.90 | NR |
| 34 | 4 | 5 | Elisabeth Timmer | Aruba | 57.86 | |
| 35 | 5 | 6 | Maddy Moore | Bermuda | 58.01 | |
| 36 | 5 | 7 | Mia Blaževska Eminova | North Macedonia | 58.05 | |
| 37 | 5 | 9 | Ani Poghosyan | Armenia | 58.80 | |
| 38 | 4 | 2 | Zaylie Thompson | Bahamas | 58.86 | |
| 39 | 1 | 9 | Maria Brunlehner | Suspended Member Federation | 59.00 | |
| 40 | 5 | 1 | Maxine Egner | Botswana | 59.02 | |
| 41 | 4 | 3 | Adriana Giles | Bolivia | 59.17 | |
| 42 | 4 | 4 | Mya Azzopardi | Malta | 59.27 | |
| 43 | 5 | 8 | Sabrina Lyn | Jamaica | 59.38 | |
| 44 | 4 | 7 | Kirabo Namutebi | Uganda | 59.50 | |
| 45 | 4 | 8 | Tilly Collymore | Grenada | 59.85 | |
| 46 | 4 | 1 | Paige van der Westhuizen | Zimbabwe | 1:00.12 | |
| 47 | 4 | 6 | Mariel Mencia | Dominican Republic | 1:00.13 | |
| 48 | 5 | 0 | Isabella Alas | El Salvador | 1:00.58 | |
| 49 | 4 | 0 | Aleka Persaud | Guyana | 1:00.67 | NR |
| 50 | 3 | 2 | Aunjelique Liddie | Antigua and Barbuda | 1:01.07 | |
| 51 | 3 | 3 | Georgia-Leigh Vele | Papua New Guinea | 1:01.17 | |
| 52 | 1 | 0 | Asma Lefalher | Bahrain | 1:01.18 | |
| 53 | 4 | 9 | Jehanara Nabi | Pakistan | 1:01.39 | NR |
| 54 | 3 | 4 | Mariam Mithqal | Jordan | 1:01.69 | |
| 54 | 3 | 8 | Mia Lee | Guam | 1:01.69 | |
| 56 | 3 | 5 | Dorcas Abeng | Nigeria | 1:01.81 | |
| 57 | 1 | 1 | Katie Rock | Albania | 1:01.89 | |
| 58 | 3 | 0 | Makelyta Singsombath | Laos | 1:01.90 | |
| 59 | 3 | 9 | Duana Lama | Nepal | 1:01.93 | |
| 60 | 3 | 6 | Kaiya Brown | Samoa | 1:02.01 | |
| 61 | 1 | 8 | Mya de Freitas | Saint Vincent and the Grenadines | 1:02.19 | |
| 62 | 3 | 7 | Jovana Kuljaca | Montenegro | 1:02.31 | |
| 63 | 1 | 4 | Hayley Wong | Brunei | 1:03.48 | |
| 64 | 2 | 4 | Charissa Panuve | Tonga | 1:03.51 | |
| 65 | 3 | 1 | Anastasiya Morginshtern | Turkmenistan | 1:03.86 | |
| 66 | 1 | 7 | Sophia Latiff | Tanzania | 1:04.47 | |
| 67 | 2 | 5 | Saba Sultan | Kuwait | 1:05.49 | |
| 68 | 2 | 3 | Tayamika Chang'Anamuno | Malawi | 1:06.58 | |
| 69 | 1 | 6 | Mashael Al-Ayed | Saudi Arabia | 1:07.66 | |
| 70 | 2 | 1 | Simanga Dlamini | Eswatini | 1:07.78 | |
| 71 | 2 | 7 | Rana Saadeldin | Sudan | 1:08.38 | |
| 72 | 1 | 3 | Kayla Hepler | Marshall Islands | 1:09.01 | |
| 73 | 2 | 9 | Loane Russet | Vanuatu | 1:10.17 | |
| 74 | 2 | 2 | Yuri Hosei | Palau | 1:10.20 | |
| 75 | 2 | 6 | Iman Kouraogo | Burkina Faso | 1:10.65 | |
| 76 | 1 | 5 | Alia Ishimwe | Burundi | 1:13.45 | |
| 77 | 2 | 8 | Imelda Ximenes | Timor-Leste | 1:17.14 | |
| | 1 | 2 | Mariama Sow | Guinea | Did not start | Did not start |
| | 2 | 0 | Abbi Illis | Sint Maarten | Did not start | Did not start |
| | 7 | 7 | Petra Senánszky | Hungary | Did not start | Did not start |

#### Swim-off

The swim-off to determine the first reserve was held on 27 July at 12:05.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Snæfríður Jórunnardóttir | Iceland | 54.87 | |
| 2 | 5 | Kalia Antoniou | Cyprus | 55.07 | |

### Semifinals

The semifinals were held on 27 July at 20:11.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 3 | Marrit Steenbergen | Netherlands | 52.82 | Q |
| 2 | 2 | 6 | Mollie O'Callaghan | Australia | 52.86 | Q |
| 3 | 2 | 4 | Siobhán Haughey | Hong Kong | 52.90 | Q |
| 4 | 2 | 5 | Emma McKeon | Australia | 53.00 | Q |
| 5 | 1 | 4 | Abbey Weitzeil | United States | 53.36 | Q |
| 6 | 2 | 7 | Kate Douglass | United States | 53.38 | Q |
| 7 | 2 | 3 | Michelle Coleman | Sweden | 53.41 | Q |
| 8 | 1 | 7 | Yang Junxuan | China | 53.67 | Q |
| 9 | 1 | 5 | Marie Wattel | France | 53.83 | |
| 10 | 1 | 6 | Cheng Yujie | China | 53.92 | |
| 11 | 2 | 8 | Signe Bro | Denmark | 53.94 | |
| 12 | 1 | 2 | Beryl Gastaldello | France | 54.49 | |
| 13 | 2 | 2 | Stephanie Balduccini | Brazil | 54.69 | |
| 14 | 2 | 1 | Sofia Morini | Italy | 54.72 | |
| 15 | 1 | 8 | Rikako Ikee | Japan | 54.86 | |
| 16 | 1 | 1 | Aimee Canny | South Africa | 54.87 | |

### Final

The final was started on 28 July at 20:02.
| Rank | Lane | Name | Nationality | Time |
| | 5 | Mollie O'Callaghan | Australia | 52.16 |
| | 3 | Siobhán Haughey | Hong Kong | 52.49 |
| | 4 | Marrit Steenbergen | Netherlands | 52.71 |
| 4 | 7 | Kate Douglass | United States | 52.81 |
| 5 | 6 | Emma McKeon | Australia | 52.83 |
| 6 | 2 | Abbey Weitzeil | United States | 53.34 |
| 7 | 1 | Michelle Coleman | Sweden | 53.83 |
| 8 | 8 | Yang Junxuan | China | 54.09 |