Pos. | Bateria | Raia | Nadadora | Nacionalidade | Tempo | Notas |
1 | 5 | 4 | Sjöström, SarahSarah Sjöström | Suécia | 0:55.96 !55.96 | Q |
2 | 3 | 4 | Worrell, KelsiKelsi Worrell | Estados Unidos | 0:56.44 !56.44 | Q |
3 | 4 | 5 | McKeon, EmmaEmma McKeon | Austrália | 0:56.81 !56.81 | Q |
4 | 3 | 5 | Ikee, RikakoRikako Ikee | Japão | 0:57.45 !57.45 | Q |
5 | 4 | 4 | Oleksiak, PennyPenny Oleksiak | Canadá | 0:57.51 !57.51 | Q |
6 | 4 | 6 | Zhang Yufei | China | 0:57.54 !57.54 | Q |
7 | 5 | 6 | An Se-hyeon | Coreia do Sul | 0:57.83 !57.83 | Q |
8 | 5 | 3 | Chimrova, SvetlanaSvetlana Chimrova | Rússia | 0:57.85 !57.85 | Q |
9 | 4 | 3 | Bianchi, IlariaIlaria Bianchi | Itália | 0:57.98 !57.98 | Q |
10 | 3 | 3 | Szilágyi, LiliánaLiliána Szilágyi | Hungria | 0:58.00 !58.00 | Q |
11 | 5 | 7 | Gibson, SarahSarah Gibson | Estados Unidos | 0:58.16 !58.16 | Q |
12 | 4 | 7 | Schmidtke, AlienaAliena Schmidtke | Alemanha | 0:58.24 !58.24 | Q |
13 | 3 | 2 | Buys, KimberlyKimberly Buys | Bélgica | 0:58.45 !58.45 | Q |
14 | 5 | 5 | Lu Ying | China | 0:58.51 !58.51 | Q |
15 | 4 | 2 | Thomas, AlysAlys Thomas | Reino Unido | 0:58.65 !58.65 | Q |
16 | 5 | 1 | Throssell, BriannaBrianna Throssell | Austrália | 0:58.66 !58.66 | Q |
17 | 5 | 2 | Osman, FaridaFarida Osman | Egito | 0:58.67 !58.67 | |
18 | 3 | 6 | Savard, KaterineKaterine Savard | Canadá | 0:58.71 !58.71 | |
19 | 3 | 1 | Hansson, LouiseLouise Hansson | Suécia | 0:58.86 !58.86 | |
20 | 3 | 8 | Beckmann, EmilieEmilie Beckmann | Dinamarca | 0:58.95 !58.95 | |
21 | 3 | 7 | Gastaldello, BérylBéryl Gastaldello | França | 0:58.97 !58.97 | |
22 | 5 | 8 | Ntountounaki, AnnaAnna Ntountounaki | Grécia | 0:59.01 !59.01 | |
23 | 4 | 1 | Atkinson, CharlotteCharlotte Atkinson | Reino Unido | 0:59.04 !59.04 | |
24 | 5 | 0 | Siebner, KerenKeren Siebner | Israel | 0:59.72 !59.72 | |
25 | 4 | 9 | Govejšek, NastjaNastja Govejšek | Eslovênia | 1:00.25 | |
26 | 4 | 8 | Svěcená, LucieLucie Svěcená | Chéquia | 1:00.34 | |
27 | 2 | 4 | van Berkel, MartinaMartina van Berkel | Suíça | 1:00.50 | |
28 | 2 | 6 | Kajtaz, AminaAmina Kajtaz | Bósnia e Herzegovina | 1:00.77 | |
29 | 3 | 0 | Chan Kin Lok | Hong Kong | 1:00.52 | |
30 | 4 | 0 | Paéz, IsabellaIsabella Paéz | Venezuela | 1:00.90 | |
31 | 2 | 5 | Meza, Marie LauraMarie Laura Meza | Costa Rica | 1:01.25 | |
32 | 3 | 9 | Hansen, BryndisBryndis Hansen | Islândia | 1:01.32 | |
33 | 2 | 3 | Muteti, EmilyEmily Muteti | Quênia | 1:01.35 | |
34 | 5 | 9 | Mišendová, BarboraBarbora Mišendová | Eslováquia | 1:01.71 | |
35 | 2 | 2 | Alkhaldi, JasmineJasmine Alkhaldi | Filipinas | 1:01.80 | |
36 | 2 | 1 | Lee, RobynRobyn Lee | Zimbabwe | 1:02.84 | |
37 | 2 | 8 | Avila, JulimarJulimar Avila | Honduras | 1:03.38 | |
38 | 1 | 5 | Poo-cheong, ElodieElodie Poo-cheong | Ilhas Maurícias | 1:03.68 | |
39 | 2 | 0 | Buadromo, MatelitaMatelita Buadromo | Fiji | 1:04.94 | |
40 | 1 | 6 | Gowda, DaminiDamini Gowda | Índia | 1:06.19 | |
41 | 1 | 8 | Mardini, YusraYusra Mardini | Atletas independentes da FINA | 1:07.99 | |
42 | 1 | 2 | Ayub, MishaelMishael Ayub | Paquistão | 1:08.33 | |
43 | 2 | 9 | Suttie, AlaniaAlania Suttie | Samoa | 1:08.77 | |
44 | 1 | 3 | Aklouk, LaraLara Aklouk | Jordânia | 1:09.37 | |
45 | 1 | 1 | Edorodion, FaithFaith Edorodion | Nigéria | 1:13.89 | |
46 | 1 | 7 | Gomez, MineriMineri Gomez | Guam | 1:17.47 | |
47 | 1 | 4 | Stagno, GessicaGessica Stagno | Moçambique | DNS |
2 | 7 | Avdic, AzraAzra Avdic | Peru |