Heats
jeudi 27 juillet 2017, 09h30 GMT – 09h30 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Sarah Sjöström | Sweden | 53.01″ |
| 2 |  Pernille Blume | Denmark | + 0.12″ |
| 3 |  Simone Manuel | United States | + 0.16″ |
| 4 |  Penny Oleksiak | Canada | + 0.17″ |
| 5 |  Mallory Comerford | United States | + 0.41″ |
| 6 |  Ranomi Kromowidjojo | Netherlands | + 0.44″ |
| 7 |  Emma McKeon | Australia | + 0.46″ |
| 8 | Bronte Campbell | Australia | + 0.55″ |
| 9 |  Federica Pellegrini | Italy | + 0.91″ |
| 10 |  Menghui Zhu | China | + 0.99″ |
| 10 |  Charlotte Bonnet | France | + 0.99″ |
| 12 | Sandrine Mainville | Canada | + 1.21″ |
| 13 | Michelle Coleman | Sweden | + 1.22″ |
| 14 | Freya Anderson | Great Britain | + 1.24″ |
| 15 | Siobhán Haughey | Hong Kong, China | + 1.44″ |
| 16 |  Andrea Murez | Israel | + 1.48″ |
| 17 | Maud van der Meer | Netherlands | + 1.48″ |
| 18 | Yanhan Ai | China | + 1.53″ |
| 19 | Silvia Di Pietro | Italy | + 1.73″ |
| 20 |  Maria Ugolkova | Switzerland | + 1.8″ |
| 21 |  Rikako Ikee | Japan | + 1.9″ |
| 22 | Manuella Lyrio | Brazil | + 2.31″ |
| 23 | Signe Bro | Denmark | + 2.39″ |
| 24 |  Erin Gallagher | South Africa | + 2.45″ |
| 25 | Farida Osman | Egypt | + 2.51″ |
| 26 | Anna Kolárová | Czech Republic | + 2.72″ |
| 27 | Yuliya Khitraya | Belarus | + 2.76″ |
| 28 | Fanni Gyurinovics | Hungary | + 2.85″ |
| 29 | Julie Meynen | Luxembourg | + 2.98″ |
| 30 | Bryndis Hansen | Iceland | + 3.1″ |
| 31 | Lotta Nevalainen | Finland | + 3.3″ |
| 32 | Rozaliya Nasretdinova | Russia | + 3.33″ |
| 33 | Susann Bjørnsen | Norway | + 3.55″ |
| 33 | Anastasia Bogdanovski | North Macedonia | + 3.55″ |
| 35 | Gabi Fa'Amausili | New Zealand | + 3.59″ |
| 36 | Jasmine Alkhaldi | Philippines | + 3.69″ |
| 37 | Gabriela Nikitina | Latvia | + 3.76″ |
| 38 | McKenna DeBever | Peru | + 3.94″ |
| 39 | Karen Torrez | Bolivia | + 4.27″ |
| 40 | Liliana Ibañez | Mexico | + 4.39″ |
| 41 | Julimar Ávila | Honduras | + 4.81″ |
| 42 | Felicity Passon | Seychelles | + 4.98″ |
| 43 | Inés Remersaro | Uruguay | + 5.26″ |
| 44 | Kimiko Raheem | Sri Lanka | + 5.34″ |
| 45 | Matelita Buadromo | Fiji | + 5.52″ |
| 46 | Élodie Poo-Cheong | Mauritius | + 5.75″ |
| 47 | Allyson Ponson | Aruba | + 5.8″ |
| 48 | Mònica Ramírez | Andorra | + 5.84″ |
| 49 | Arianna Sanna | Dominican Republic | + 6.02″ |
| 50 | Devyn Leask | Zimbabwe | + 6.07″ |
| 50 | Baean Jouma | Syria | + 6.07″ |
| 52 | Ani Poghosyan | Armenia | + 6.26″ |
| 53 | Talita Baqlah | Jordan | + 6.32″ |
| 54 | Catharine Cooper | Panama | + 6.36″ |
| 55 | Chi Yan Tan | Macau, China | + 6.37″ |
| 56 | Gabriela Santis | Guatemala | + 6.53″ |
| 57 | Jovana Terzic | Montenegro | + 6.85″ |
| 58 | Nikol Merizaj | Albania | + 7.03″ |
| 59 | Lani Cabrera | Barbados | + 7.74″ |
| 60 | Sonia Tumiotto | Tanzania | + 7.89″ |
| 61 | Enkhkhuslen Batbayar | Mongolia | + 7.91″ |
| 61 | Ana Nóbrega | Angola | + 7.91″ |
| 63 | Gabriela Hernández | Nicaragua | + 8.14″ |
| 64 | Jeanne Boutbien | Senegal | + 8.29″ |
| 65 | Mi Song Pak | DPR Korea | + 9.23″ |
| 66 | Mikaili Charlemagne | St. Lucia | + 9.58″ |
| 67 | Flaka Pruthi | Kosovo | + 10.8″ |
| 68 | Annie Hepler | Marshall Islands | + 11″ |
| 69 | Sofia Shah | Nepal | + 11.82″ |
| 70 | Bianca Mitchell | Antigua and Barbuda | + 12.05″ |
| 71 | Mineri Gomez | Guam | + 12.08″ |
| 72 | Charissa Panuve | Tonga | + 12.46″ |
| 73 | Anastasiya Tyurina | Tajikistan | + 16.13″ |
| 74 | Aminath Shajan | Maldives | + 17.16″ |
| 75 | Tayamika Chang'Anamuno | Malawi | + 17.83″ |
| 76 | Jinju Thompson | Northern Mariana Islands | + 19.06″ |
| 77 | Lidwine Umuhoza Uwase | Rwanda | + 22.99″ |
| 78 | Imelda Belo | East Timor | + 26.51″ |
| Lena Irankunda | Burundi | DNS |