Heats
mardi 25 juillet 2017, 09h49 GMT – 09h49 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Federica Pellegrini | Italy | 1′ 56.07″ |
| 2 |  Katie Ledecky | United States | + 0.2″ |
| 3 |  Katinka Hosszú | Hungary | + 0.36″ |
| 4 |  Emma McKeon | Australia | + 0.54″ |
| 5 |  Siobhán Haughey | Hong Kong, China | + 0.55″ |
| 6 | Leah Smith | United States | + 0.97″ |
| 7 |  Femke Heemskerk | Netherlands | + 0.99″ |
| 7 | Veronika Andrusenko | Russia | + 0.99″ |
| 9 |  Michelle Coleman | Sweden | + 1.08″ |
| 10 |  Charlotte Bonnet | France | + 1.27″ |
| 11 |  Chihiro Igarashi | Japan | + 1.6″ |
| 12 |  Bingjie Li | China | + 1.72″ |
| 13 | Yanhan Ai | China | + 1.97″ |
| 14 |  Katerine Savard | Canada | + 2.09″ |
| 15 | Mary-Sophie Harvey | Canada | + 2.31″ |
| 16 | Robin Neumann | Netherlands | + 2.59″ |
| 17 | Ariarne Titmus | Australia | + 2.72″ |
| 18 |  Maria Ugolkova | Switzerland | + 3.06″ |
| 19 | Manuella Lyrio | Brazil | + 3.17″ |
| 20 | Easop Lee | Korea | + 3.31″ |
| 21 | Tomomi Aoki | Japan | + 3.37″ |
| 22 |  Andrea Murez | Israel | + 3.68″ |
| 23 | Evelyn Verrasztó | Hungary | + 3.85″ |
| 24 | Alice Mizzau | Italy | + 4.03″ |
| 25 | Anastasia Guzhenkova | Russia | + 4.17″ |
| 26 | Diana Durães | Portugal | + 5.41″ |
| 27 |  Signe Bro | Denmark | + 6.16″ |
| 28 | Anastasia Bogdanovski | North Macedonia | + 6.85″ |
| 29 | Anna Kolárová | Czech Republic | + 6.92″ |
| 30 | McKenna DeBever | Peru | + 7.09″ |
| 31 | Monique Olivier | Luxembourg | + 7.19″ |
| 32 | Helena Moreno | Costa Rica | + 7.51″ |
| 33 | Jessica Camposano | Colombia | + 8.06″ |
| 34 | Gaja Natlacen | Slovenia | + 8.15″ |
| 35 | Ressa Kania Dewi | Indonesia | + 9.18″ |
| 36 | Nicole Oliva | Philippines | + 9.48″ |
| 37 | Gabriela Santis | Guatemala | + 10.87″ |
| 38 | Devyn Leask | Zimbabwe | + 12.06″ |
| 39 | Nicole Rautemberg | Paraguay | + 12.35″ |
| 40 | Arianna Sanna | Dominican Republic | + 12.38″ |
| 41 | Lauren Hew | Cayman Islands | + 12.84″ |
| 42 | Dara Al-Bakry | Jordan | + 14.55″ |
| 43 | Sonia Tumiotto | Tanzania | + 14.94″ |
| 44 | Chi Yan Tan | Macau, China | + 15.54″ |
| 45 | Lani Cabrera | Barbados | + 15.7″ |
| 46 | Ishani Senanayake | Sri Lanka | + 17.31″ |
| 47 | Yusra Mardini | + 19.73″ | |
| 48 | Diana Basho | Albania | + 26.79″ |
| 49 | Bianca Mitchell | Antigua and Barbuda | + 28.6″ |
| 50 | Osisang Chilton | Palau | + 29.76″ |
| 51 | Tisa Shakya | Nepal | + 33.13″ |
| 52 | Jinju Thompson | Northern Mariana Islands | + 40.4″ |
| Andreina Pinto | Venezuela | DNS | |
| Julia Hassler | Liechtenstein | DNS |