# Swimming at the 2017 World Aquatics Championships – Women's 100 metre freestyle

The Women's 100 metre freestyle competition at the 2017 World Championships was held on 27 and 28 July 2017.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Cate Campbell (AUS) | 52.06 | Brisbane, Australia | 2 July 2016 |
| Competition record | Britta Steffen (GER) | 52.07 | Rome, Italy | 31 July 2009 |
During the competition, prior to this 100 metre event, on 23 July 2017, Sarah Sjöström set a new world record in the 4 × 100 metre freestyle relay final; her mark was at 51.71.
| Date | Event | Name | Nationality | Time | Record |
| 23 July | Women's 4 × 100 m freestyle relay final | Sarah Sjöström | Sweden | 51.71 | WR, CR |

## Results
### Heats

The heats were held on 27 July at 09:30.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 8 | 4 | Sarah Sjöström | Sweden | 53.01 | Q |
| 2 | 7 | 6 | Pernille Blume | Denmark | 53.13 | Q, NR |
| 3 | 6 | 4 | Simone Manuel | United States | 53.17 | Q |
| 4 | 8 | 5 | Penny Oleksiak | Canada | 53.18 | Q |
| 5 | 6 | 5 | Mallory Comerford | United States | 53.42 | Q |
| 6 | 8 | 3 | Ranomi Kromowidjojo | Netherlands | 53.45 | Q |
| 7 | 7 | 5 | Emma McKeon | Australia | 53.47 | Q |
| 8 | 7 | 4 | Bronte Campbell | Australia | 53.56 | Q |
| 9 | 7 | 3 | Federica Pellegrini | Italy | 53.92 | Q |
| 10 | 6 | 6 | Charlotte Bonnet | France | 54.00 | Q |
| 10 | 8 | 6 | Zhu Menghui | China | 54.00 | Q |
| 12 | 7 | 2 | Sandrine Mainville | Canada | 54.22 | Q |
| 13 | 6 | 3 | Michelle Coleman | Sweden | 54.23 | Q |
| 14 | 8 | 7 | Freya Anderson | Great Britain | 54.25 | Q |
| 15 | 6 | 1 | Siobhan Haughey | Hong Kong | 54.45 | Q |
| 16 | 6 | 7 | Maud van der Meer | Netherlands | 54.49 | QSO |
| 16 | 8 | 1 | Andrea Murez | Israel | 54.49 | QSO |
| 18 | 7 | 7 | Ai Yanhan | China | 54.54 | |
| 19 | 6 | 2 | Silvia di Pietro | Italy | 54.74 | |
| 20 | 7 | 1 | Maria Ugolkova | Switzerland | 54.81 | |
| 21 | 8 | 2 | Rikako Ikee | Japan | 54.91 | |
| 22 | 8 | 8 | Manuella Lyrio | Brazil | 55.32 | |
| 23 | 6 | 8 | Signe Bro | Denmark | 55.40 | |
| 24 | 5 | 5 | Erin Gallagher | South Africa | 55.46 | |
| 25 | 8 | 9 | Farida Osman | Egypt | 55.52 | |
| 26 | 7 | 9 | Anna Kolářová | Czech Republic | 55.73 | |
| 27 | 7 | 0 | Yuliya Khitraya | Belarus | 55.77 | |
| 28 | 6 | 9 | Fanni Gyurinovics | Hungary | 55.86 | |
| 29 | 8 | 0 | Julie Meynen | Luxembourg | 55.99 | |
| 30 | 5 | 7 | Bryndis Hansen | Iceland | 56.11 | |
| 31 | 5 | 6 | Lotta Nevalainen | Finland | 56.31 | |
| 32 | 7 | 8 | Rozaliya Nasretdinova | Russia | 56.34 | |
| 33 | 6 | 0 | Susann Bjørnsen | Norway | 56.56 | |
| 33 | 4 | 4 | Anastasia Bogdanovski | North Macedonia | 56.56 | |
| 35 | 5 | 3 | Gabrielle Fa'amausili | New Zealand | 56.60 | |
| 36 | 5 | 2 | Jasmine Alkhaldi | Philippines | 56.70 | |
| 37 | 5 | 8 | Gabriela Ņikitina | Latvia | 56.77 | |
| 38 | 5 | 1 | McKenna DeBever | Peru | 56.95 | |
| 39 | 4 | 5 | Karen Torrez | Bolivia | 57.28 | |
| 40 | 5 | 4 | Liliana Ibáñez | Mexico | 57.40 | |
| 41 | 4 | 6 | Julimar Avila | Honduras | 57.82 | |
| 42 | 5 | 9 | Felicity Passon | Seychelles | 57.99 | |
| 43 | 4 | 2 | Inés Remersaro | Uruguay | 58.27 | |
| 44 | 4 | 3 | Kimiko Raheem | Sri Lanka | 58.35 | |
| 45 | 4 | 1 | Matelita Buadromo | Fiji | 58.53 | |
| 46 | 1 | 3 | Elodie Poo-cheong | Mauritius | 58.76 | |
| 47 | 5 | 0 | Allyson Ponson | Aruba | 58.81 | |
| 48 | 3 | 4 | Mónica Ramírez | Andorra | 58.85 | =NR |
| 49 | 4 | 9 | Arianna Sanna | Dominican Republic | 59.03 | |
| 50 | 3 | 2 | Devyn Leask | Zimbabwe | 59.08 | |
| 50 | 4 | 7 | Bayan Jumah | Syria | 59.08 | |
| 52 | 1 | 2 | Ani Poghosyan | Armenia | 59.27 | |
| 53 | 3 | 3 | Talita Baqlah | Jordan | 59.33 | |
| 54 | 4 | 8 | Catharine Cooper | Panama | 59.37 | |
| 55 | 3 | 1 | Tan Chi Yan | Macau | 59.38 | |
| 56 | 4 | 0 | Gabriela Santis | Guatemala | 59.54 | |
| 57 | 3 | 5 | Jovana Terzić | Montenegro | 59.86 | |
| 58 | 3 | 8 | Nikol Merizaj | Albania | 1:00.04 | |
| 59 | 3 | 9 | Lani Cabrera | Barbados | 1:00.75 | |
| 60 | 2 | 1 | Sonia Tumiotto | Tanzania | 1:09.00 | |
| 61 | 3 | 6 | Ana Sofia Nóbrega | Angola | 1:00.92 | |
| 61 | 1 | 6 | Batbayaryn Enkhkhuslen | Mongolia | 1:00.92 | |
| 63 | 1 | 4 | Gabriela Hernandez | Nicaragua | 1:01.15 | |
| 64 | 3 | 0 | Jeanne Boutbien | Senegal | 1:01.30 | |
| 65 | 1 | 8 | Park Mi-song | North Korea | 1:02.24 | |
| 66 | 2 | 5 | Mikaili Charlemagne | Saint Lucia | 1:02.59 | |
| 67 | 2 | 4 | Flaka Pruthi | Kosovo | 1:03.81 | |
| 68 | 2 | 3 | Ann-Marie Hepler | Marshall Islands | 1:04.01 | |
| 69 | 2 | 8 | Sofia Shah | Nepal | 1:04.83 | |
| 70 | 2 | 6 | Bianca Mitchell | Antigua and Barbuda | 1:05.06 | |
| 71 | 2 | 2 | Mineri Gomez | Guam | 1:05.09 | |
| 72 | 2 | 7 | Charissa Panuve | Tonga | 1:05.47 | |
| 73 | 2 | 0 | Anastasiya Tyurina | Tajikistan | 1:09.14 | |
| 74 | 1 | 1 | Aminath Shajan | Maldives | 1:10.17 | |
| 75 | 2 | 9 | Tayamika Chang'anamuno | Malawi | 1:10.84 | |
| 76 | 1 | 5 | Jin Ju Thompson | Northern Mariana Islands | 1:12.07 | |
| 77 | 1 | 7 | Lidwine Uwase | Rwanda | 1:16.00 | |
| 78 | 1 | 0 | Imelda Ximenes Belo | East Timor | 1:19.52 | |
| — | 1 | 9 | Lena Irankunda | Burundi | DNS | DNS |

### Swim-off

The swim-off was held on 27 July at 10:58.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | Andrea Murez | Israel | 54.20 | Q, NR |
| 2 | 4 | Maud van der Meer | Netherlands | 54.49 | |

### Semifinals

The semifinals were held on 27 July at 17:41.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Pernille Blume | Denmark | 52.99 | Q, NR |
| 2 | 6 | Bronte Campbell | Australia | 53.04 | Q |
| 3 | 5 | Penny Oleksiak | Canada | 53.05 | Q |
| 4 | 3 | Ranomi Kromowidjojo | Netherlands | 53.09 | Q |
| 5 | 2 | Charlotte Bonnet | France | 53.77 | |
| 6 | 1 | Freya Anderson | Great Britain | 53.91 | |
| 7 | 7 | Sandrine Mainville | Canada | 54.01 | |
| 8 | 8 | Andrea Murez | Israel | 54.62 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Sarah Sjöström | Sweden | 52.44 | Q |
| 2 | 5 | Simone Manuel | United States | 52.69 | Q |
| 3 | 3 | Mallory Comerford | United States | 52.85 | Q |
| 4 | 6 | Emma McKeon | Australia | 53.20 | Q |
| 5 | 1 | Michelle Coleman | Sweden | 53.51 | |
| 6 | 7 | Zhu Menghui | China | 53.85 | |
| 7 | 8 | Siobhán Haughey | Hong Kong | 54.05 | |
| 8 | 2 | Federica Pellegrini | Italy | 54.26 | |

### Final

The final was held on 28 July at 17:32.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Simone Manuel | United States | 52.27 | AM |
| | 4 | Sarah Sjöström | Sweden | 52.31 | |
| | 6 | Pernille Blume | Denmark | 52.69 | NR |
| 4 | 3 | Mallory Comerford | United States | 52.77 | |
| 5 | 1 | Ranomi Kromowidjojo | Netherlands | 52.78 | |
| 6 | 7 | Penny Oleksiak | Canada | 52.94 | |
| 7 | 2 | Bronte Campbell | Australia | 53.18 | |
| 8 | 8 | Emma McKeon | Australia | 53.21 | |