Heats
mardi 11 décembre 2018, 04h49 GMT – 04h49 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Olivia Smoliga | United States | 55.47″ |
| 2 |  Emily Seebohm | Australia | + 1.61″ |
| 3 |  Katinka Hosszú | Hungary | + 1.62″ |
| 4 |  Simona Kubová | Czech Republic | + 1.66″ |
| 5 |  Kathleen Baker | United States | + 1.69″ |
| 6 | Minna Atherton | Australia | + 1.7″ |
| 7 |  Michelle Coleman | Sweden | + 1.74″ |
| 8 | Georgia Davies | Great Britain | + 1.77″ |
| 9 | Sayaka Akase | Japan | + 1.89″ |
| 10 | Emi Moronuki | Japan | + 1.95″ |
| 11 | Yuanhui Fu | China | + 2.19″ |
| 12 | Alicja Tchórz | Poland | + 2.31″ |
| 13 | Anastasia Fesikova | Russia | + 2.38″ |
| 14 |  Mimosa Jallow | Finland | + 2.46″ |
| 15 |  Margherita Panziera | Italy | + 2.67″ |
| 16 |  Mathilde Cini | France | + 2.69″ |
| 17 | Daria K Ustinova | Russia | + 2.74″ |
| 18 |  Laura Riedemann | Germany | + 2.8″ |
| 19 |  Anastasiya Shkurdai | Belarus | + 2.97″ |
| 20 | Andrea Berrino | Argentina | + 3.11″ |
| 21 |  Etiene Medeiros | Brazil | + 3.15″ |
| 22 | Hanna Rosvall | Sweden | + 3.33″ |
| 23 | Isabella Arcila | Colombia | + 3.36″ |
| 24 | Caroline Pilhatsch | Austria | + 3.44″ |
| 25 | Jenny Mensing | Germany | + 3.61″ |
| 26 | Karolína Hájková | Slovakia | + 3.78″ |
| 27 | Ekaterina Avramova | Turkey | + 3.79″ |
| 28 | Ingrid Wilm | Canada | + 3.84″ |
| 29 |  Jie Chen | China | + 3.89″ |
| 30 |  Stephanie Au | Hong Kong, China | + 3.91″ |
| 31 | Carlotta Zofkova | Italy | + 4.1″ |
| 32 | Krystal Lara | Dominican Republic | + 4.81″ |
| 33 | Gabriela Georgieva | Bulgaria | + 5.11″ |
| 34 | África Zamorano | Spain | + 5.27″ |
| 35 | Lushavel Stickland | Samoa | + 5.28″ |
| 36 | Felicity Passon | Seychelles | + 5.34″ |
| 37 | Paige Flynn | New Zealand | + 5.42″ |
| 38 | Signhild Joensen | Faroe Islands | + 5.51″ |
| 39 | Celina Marquez | El Salvador | + 5.8″ |
| 40 | Tatiana Salcutan | Moldova | + 7.49″ |
| 41 | Andrea Becali | Cuba | + 8.49″ |
| 42 | Mònica Ramírez | Andorra | + 8.59″ |
| 43 | Trinidad Ardiles | Chile | + 8.76″ |
| 44 | Camille Koenig | Mauritius | + 9″ |
| 45 | Nimia Murúa | Panama | + 9.62″ |
| 46 | Hye Gyong Ri | DPR Korea | + 10.06″ |
| 47 | Danielle Treasure | Barbados | + 11.27″ |
| 48 | Colleen Furgeson | Marshall Islands | + 11.97″ |
| 49 | Kimberly Ince | Grenada | + 12.21″ |
| 50 | Yolani Blake | Fiji | + 12.4″ |
| 51 | Eda Zeqiri | Kosovo | + 13.22″ |
| 52 | Britheny Joassaint | Haiti | + 14.11″ |
| 53 | Osisang Chilton | Palau | + 16.63″ |
| 54 | Ada Thioune | Senegal | + 21.35″ |
| 55 | Amanda Poppe | Guam | + 25.97″ |
| Hamna Ahmed | Maldives | DNS | |
| Naima Akter | Bangladesh | DNS |