# Swimming at the 2024 Summer Olympics – Women's 100 metre freestyle

The women's 100 metre freestyle event at the 2024 Summer Olympics was held on 30 and 31 July 2024 at Paris La Défense Arena, which was converted to a swimming pool for the swimming events. Since an Olympic size swimming pool is 50 metres long, this race consisted of two lengths of the pool.

## Records

Prior to this competition, the existing world and Olympic records were as follows:
| World record | Sarah Sjöström (SWE) | 51.71 | Budapest, Hungary | 23 July 2017 |
| Olympic record | Emma McKeon (AUS) | 51.96 | Tokyo, Japan | 30 July 2021 |

## Qualification

Each National Olympic Committee (NOC) was permitted to enter a maximum of two qualified athletes in each individual event, but only if both of them had attained the Olympic Qualifying Time (OQT). For this event, the OQT was 53.61 seconds. World Aquatics then considered athletes qualifying through universality; NOCs were given one event entry for each gender, which could be used by any athlete regardless of qualification time, providing the spaces had not already been taken by athletes from that nation who had achieved the OQT. Finally, the rest of the spaces were filled by athletes who had met the Olympic Consideration Time (OCT), which was 53.88 for this event. In total, 14 athletes qualified through achieving the OQT, 14 athletes qualified through universality places and one athlete qualified through achieving the OCT.
Top 10 fastest qualification times :
| Swimmer | Country | Time | Competition |
| Siobhan Haughey | Hong Kong | 00:52:02 | 2023 World Aquatics World Cup |
| Mollie O'Callaghan | Australia | 00:52:08 | 2023 World Aquatics Championships |
| Sarah Sjöström | Sweden | 00:52:24 | 2023 World Aquatics Championships |
| Marrit Steenbergen | Netherlands | 00:52:26 | 2024 World Aquatics Championships |
| Shayna Jack | Australia | 00:52:28 | 2023 World Aquatics Championships |
| Yang Junxuan | China | 00:52:68 | 2024 Chinese Championships |
| Torri Huske | United States | 00:52:90 | 2024 United States Olympic Trials |
| Anna Hopkin | Great Britain | 00:53:09 | 2024 World Aquatics Championships |
| Gretchen Walsh | United States | 00:53:13 | 2024 United States Olympic Trials |
| Wu Qingfeng | China | 00:53:25 | 2024 Chinese Championships |

## Results
### Heats

29 competitors enter the event. The top sixteen on time advance to the semi-final.
Results :
| Rank | Heat | Lane | Swimmer | Nation | Time | Notes |
| 1 | 2 | 4 | Sarah Sjöström | Sweden | 52.99 | Q |
| 2 | 4 | 4 | Siobhan Haughey | Hong Kong | 53.02 | Q |
| 3 | 2 | 5 | Yang Junxuan | China | 53.05 | Q |
| 4 | 4 | 5 | Marrit Steenbergen | Netherlands | 53.22 | Q |
| 5 | 3 | 4 | Mollie O'Callaghan | Australia | 53.27 | Q |
| 6 | 3 | 5 | Shayna Jack | Australia | 53.40 | Q |
| 7 | 4 | 3 | Torri Huske | United States | 53.53 | Q |
| 8 | 2 | 3 | Gretchen Walsh | United States | 53.54 | Q |
| 9 | 3 | 2 | Beryl Gastaldello | France | 53.65 | Q |
| 10 | 3 | 3 | Anna Hopkin | Great Britain | 53.67 | Q |
| 10 | 4 | 1 | Kayla Sanchez | Philippines | 53.67 | Q, NR |
| 12 | 4 | 2 | Marie Wattel | France | 53.70 | Q |
| 13 | 4 | 6 | Wu Qingfeng | China | 54.03 | Q |
| 14 | 3 | 6 | Michelle Coleman | Sweden | 54.10 | Q |
| 15 | 4 | 7 | Neza Klancar | Slovenia | 54.12 | Q |
| 16 | 2 | 2 | Maggie Mac Neil | Canada | 54.16 | Q, WD |
| 17 | 2 | 6 | Barbora Seemanova | Czech Republic | 54.66 | Q |
| 18 | 2 | 7 | Kalia Antoniou | Cyprus | 54.75 | R |
| 19 | 3 | 1 | Snaefridur Sol Jorunnardottir | Iceland | 54.85 | |
| 20 | 3 | 7 | Kornelia Fiedkiewicz | Poland | 55.25 | |
| 21 | 3 | 8 | Jana Pavalic | Croatia | 55.77 | |
| 22 | 4 | 8 | Gloria Anna Muzito | Uganda | 55.95 | |
| 23 | 2 | 1 | Jillian Janis Geohagan Crooks | Cayman Islands | 56.15 | |
| 24 | 2 | 8 | Nesrine Medjahed | Algeria | 57.34 | |
| 25 | 1 | 4 | Paige van der Westhuizen | Zimbabwe | 58.19 | |
| 26 | 1 | 3 | Tilly Collymore | Grenada | 58.84 | |
| 27 | 1 | 5 | Maxine Egner | Botswana | 58.98 | |
| 28 | 1 | 6 | Aleka Kylela Persaud | Guyana | 1:01.29 | |
| 29 | 1 | 2 | Rana Saadeldin | Sudan | 1:04.72 | |

### Semifinals

The swimmers with the best 8 times, regardless of heat, advance to the final.
Results :
| Rank | Heat | Lane | Swimmer | Nation | Time | Notes |
| 1 | 1 | 4 | Siobhán Haughey | Hong Kong | 52.64 | Q |
| 2 | 1 | 3 | Shayna Jack | Australia | 52.72 | Q |
| 3 | 2 | 3 | Mollie O'Callaghan | Australia | 52.75 | Q |
| 4 | 2 | 5 | Yang Junxuan | China | 52.81 | Q |
| 5 | 1 | 5 | Marrit Steenbergen | Netherlands | 52.86 | Q |
| 6 | 2 | 4 | Sarah Sjöström | Sweden | 52.87 | Q |
| 7 | 2 | 6 | Torri Huske | United States | 52.99 | Q |
| 8 | 1 | 6 | Gretchen Walsh | United States | 53.18 | Q |
| 9 | 2 | 1 | Wu Qingfeng | China | 53.34 | |
| 10 | 1 | 7 | Marie Wattel | France | 53.38 | |
| 11 | 1 | 2 | Anna Hopkin | Great Britain | 53.74 | |
| 12 | 1 | 1 | Michelle Coleman | Sweden | 53.75 | |
| 13 | 1 | 8 | Barbora Seemanova | Czech Republic | 53.94 | |
| 14 | 2 | 8 | Neza Klancar | Slovenia | 53.96 | NR |
| 15 | 2 | 7 | Kayla Sanchez | Philippines | 54.21 | |
| 16 | 2 | 2 | Beryl Gastaldello | France | 54.29 | |

### Final

Results :
| Rank | Lane | Swimmer | Nation | Time |
| | 7 | Sarah Sjöström | Sweden | 52.16 |
| | 1 | Torri Huske | United States | 52.29 |
| | 4 | Siobhán Haughey | Hong Kong | 52.33 |
| 4 | 3 | Mollie O'Callaghan | Australia | 52.34 |
| 5 | 5 | Shayna Jack | Australia | 52.72 |
| 6 | 6 | Yang Junxuan | China | 52.82 |
| 7 | 2 | Marrit Steenbergen | Netherlands | 52.83 |
| 8 | 8 | Gretchen Walsh | United States | 53.04 |
Statistics :
| Name | 15 metre split (s) | 50 metre split (s) | 50–65 metre split (s) | Time (s) | Stroke rate (strokes/min) |
| Sarah Sjöström | 6.18 | 25.26 | 7.56 | 52.16 | 51.6 |
| Torri Huske | 6.01 | 25.06 | 7.22 | 52.29 | 50.4 |
| Siobhán Haughey | 6.28 | 25.09 | 7.48 | 52.33 | 53.8 |
| Mollie O'Callaghan | 6.17 | 25.51 | 7.23 | 52.34 | 50.6 |
| Shayna Jack | 6.35 | 25.29 | 7.69 | 52.72 | 51.8 |
| Yang Junxuan | 6.36 | 25.51 | 7.85 | 52.82 | 54.0 |
| Marrit Steenbergen | 6.31 | 25.38 | 7.41 | 52.83 | 51.8 |
| Gretchen Walsh | 5.96 | 25.22 | 7.40 | 53.04 | 47.5 |