| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | 
|---|---|---|---|---|---|---|---|
| 1 | 1 | 6 | 658 | Ludovica CAVO | 
 ITA                 | 
                57.77 Q PB | |
| 2 | 1 | 3 | 649 | Michelle SMITH | 
 ISV                 | 
                58.35 Q | |
| 3 | 2 | 3 | 960 | Akala GARRETT | 
 USA                 | 
                58.40 Q | |
| 4 | 1 | 4 | 984 | Michaela ROSE | 
 USA                 | 
                58.44 Q | |
| 5 | 2 | 6 | 851 | Anje NEL | 
 RSA                 | 
                58.52 Q SB | |
| 6 | 1 | 1 | 417 | Klara KOŠČAK | 
 CRO                 | 
                58.84 Q NU20R | |
| 7 | 1 | 2 | 309 | Isabella GUTHRIE | 
 AUS                 | 
                58.89 Q | |
| 8 | 2 | 1 | 691 | Moe MATSUOKA | 
 JPN                 | 
                58.90 Q | .898 | 
| 9 | 2 | 4 | 801 | Wiktoria OKO | 
 POL                 | 
                58.90 Q | .900 | 
| 10 | 3 | 6 | 592 | Lara-Noelle STEINBRECHER | 
 GER                 | 
                58.95 Q | |
| 11 | 2 | 2 | 667 | Alessia SERAMONDI | 
 ITA                 | 
                59.03 Q | |
| 12 | 3 | 2 | 542 | Ophelia PYE | 
 GBR                 | 
                59.04 Q | |
| 13 | 4 | 6 | 745 | Antonia SANCHEZ | 
 MEX                 | 
                59.35 q PB | |
| 14 | 1 | 5 | 903 | Hanna KARLSSON | 
 SWE                 | 
                59.38 Q | |
| 15 | 2 | 5 | 808 | Aleksandra WOŁCZAK | 
 POL                 | 
                59.39 Q | |
| 16 | 3 | 5 | 685 | Oneika MCANNUFF | 
 JAM                 | 
                59.45 Q | |
| 17 | 3 | 4 | 577 | Vivienne MORGENSTERN | 
 GER                 | 
                59.57 Q | |
| 18 | 3 | 1 | 445 | Amanda HENRIQUES | 
 DEN                 | 
                59.62 Q PB | |
| 19 | 4 | 5 | 774 | Marin Stray GAUTADOTTIR | 
 NOR                 | 
                59.74 q PB | |
| 20 | 4 | 4 | 813 | Sofia LAVRESHINA | 
 POR                 | 
                59.88 q SB | |
| 21 | 4 | 2 | 899 | Andrea ŠVECOVÁ | 
 SVK                 | 
                1:00.07 q PB | |
| 22 | 4 | 1 | 604 | Vasiliki-Paraskevi MITSIOULI | 
 GRE                 | 
                1:00.20 q | |
| 23 | 5 | 2 | 941 | Yaroslava YALYSOVETSKA | 
 UKR                 | 
                1:00.29 q | |
| 24 | 5 | 6 | 643 | Lucy MCGLYNN | 
 IRL                 | 
                1:00.30 | |
| 25 | 3 | 3 | 836 | Simone DE WET | 
 RSA                 | 
                1:00.35 Q | |
| 26 | 6 | 6 | 429 | Ester BENDOVÁ | 
 CZE                 | 
                1:00.40 | |
| 27 | 5 | 5 | 857 | Neža DOLENC | 
 SLO                 | 
                1:00.44 | |
| 28 | 4 | 3 | 762 | Esther Elo JOSEPH | 
 NGR                 | 
                1:00.51 | |
| 29 | 7 | 6 | 478 | Juliana DEMEŠTŠENKO | 
 EST                 | 
                1:00.71 | |
| 30 | 5 | 3 | 423 | Liliet M. CABRERA | 
 CUB                 | 
                1:00.73 | |
| 31 | 5 | 4 | 363 | Letícia QUINGOSTAS | 
 BRA                 | 
                1:00.80 | |
| 32 | 6 | 3 | 679 | Safhia HINDS | 
 JAM                 | 
                1:00.97 | |
| 33 | 6 | 5 | 381 | Jenna JAMES | 
 CAN                 | 
                1:00.99 | |
| 34 | 6 | 4 | 727 | Gerda KIRKYTĖ | 
 LTU                 | 
                1:01.00 | |
| 35 | 8 | 6 | 885 | Anna HABERTHÜR | 
 SUI                 | 
                1:01.72 | |
| 36 | 7 | 5 | 871 | Amesha Piumanthi Hettiarachchi HETTIARACHCHILAGE | 
 SRI                 | 
                1:02.11 | |
| 37 | 6 | 2 | 420 | Anja RAMIĆ | 
 CRO                 | 
                1:02.28 | |
| 38 | 7 | 2 | 639 | . SIMMY | 
 IND                 | 
                1:02.58 | |
| 39 | 5 | 1 | 730 | Ema SARAFINAITĖ | 
 LTU                 | 
                1:02.71 | |
| 40 | 7 | 3 | 374 | Sita SIBIRI | 
 BUR                 | 
                1:03.52 | |
| 41 | 8 | 5 | 401 | Juliana Katerine GARCES | 
 COL                 | 
                1:04.20 | |
| 42 | 6 | 1 | 389 | Savannah SUTHERLAND | 
 CAN                 | 
                1:04.46 | |
| 43 | 7 | 1 | 355 | Camille Cristina DE OLIVEIRA | 
 BRA                 | 
                1:10.73 | |
| 4 | 493 | Aada AHO | 
 FIN                 | 
                DQ | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second