| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | 
|---|---|---|---|---|---|---|---|
| 1 | 1 | 3 | 818 | Ella ONOJUVWEVWO | 
 NGR                 | 
                52.19 Q | |
| 2 | 1 | 4 | 1003 | Zaya AKINS | 
 USA                 | 
                52.69 Q | |
| 3 | 1 | 2 | 407 | Dianna PROCTOR | 
 CAN                 | 
                52.73 Q PB | |
| 4 | 2 | 2 | 472 | Lurdes Gloria MANUEL | 
 CZE                 | 
                52.76 Q | |
| 5 | 2 | 3 | 441 | Paola LOBOA | 
 COL                 | 
                52.81 Q PB | |
| 6 | 1 | 1 | 578 | Charlotte HENRICH | 
 GBR                 | 
                53.07 Q | |
| 7 | 3 | 2 | 862 | Dominika DURAJ | 
 POL                 | 
                53.16 Q | |
| 8 | 2 | 1 | 622 | Johanna MARTIN | 
 GER                 | 
                53.22 Q | |
| 9 | 1 | 6 | 1039 | Michaela MOUTON | 
 USA                 | 
                53.29 Q | |
| 10 | 2 | 6 | 436 | Nahomy CASTRO | 
 COL                 | 
                53.37 Q SB | |
| 11 | 3 | 3 | 331 | Jemma POLLARD | 
 AUS                 | 
                53.45 Q | |
| 12 | 2 | 4 | 575 | Kara DACOSTA | 
 GBR                 | 
                53.59 Q | |
| 13 | 3 | 1 | 665 | Zita SZENTGYÖRGYI | 
 HUN                 | 
                53.63 Q | |
| 14 | 4 | 3 | 824 | Line Safaa AL-SAIDDI | 
 NOR                 | 
                53.64 q SB | |
| 15 | 1 | 5 | 721 | Elisa VALENSIN | 
 ITA                 | 
                53.82 Q | |
| 16 | 2 | 5 | 926 | Karolina ZBIČAJNIK | 
 SLO                 | 
                53.86 Q | |
| 17 | 4 | 2 | 385 | Julia Aparecida ROCHA | 
 BRA                 | 
                53.87 q | |
| 18 | 4 | 1 | 843 | Madeleine WADDELL | 
 NZL                 | 
                54.02 q PB | |
| 19 | 3 | 4 | 889 | Maria Denisa CAPOTĂ | 
 ROU                 | 
                54.03 Q | |
| 20 | 3 | 5 | 335 | Amelia ROWE | 
 AUS                 | 
                54.10 Q | |
| 21 | 4 | 4 | 906 | Precious MOLEPO | 
 RSA                 | 
                54.11 q | |
| 22 | 5 | 3 | 1050 | Jonbibi HUKMOVA | 
 UZB                 | 
                54.12 q PB | |
| 23 | 3 | 6 | 749 | Shanque WILLIAMS | 
 JAM                 | 
                54.22 Q | |
| 24 | 5 | 2 | 829 | Borghild Oline HOLSTAD | 
 NOR                 | 
                54.48 q | |
| 25 | 4 | 5 | 654 | Tianna SPRINGER | 
 GUY                 | 
                54.49 | .482 | 
| 26 | 4 | 6 | 913 | Chane VERMEULEN | 
 RSA                 | 
                54.49 | .487 | 
| 27 | 5 | 6 | 412 | Kiara WEBB | 
 CAN                 | 
                54.60 | |
| 28 | 6 | 3 | 750 | Abrina WRIGHT | 
 JAM                 | 
                54.63 | |
| 29 | 7 | 3 | 805 | Angelique ABBERLEY | 
 MRI                 | 
                54.66 NU20R | .658 | 
| 30 | 6 | 6 | 916 | Laavinia JAIGANTH | 
 SGP                 | 
                54.66 NU20R | .659 | 
| 31 | 6 | 2 | 653 | Narissa MCPHERSON | 
 GUY                 | 
                54.67 | |
| 32 | 5 | 4 | 964 | Lenka GYMERSKÁ | 
 SVK                 | 
                55.01 | |
| 33 | 7 | 6 | 888 | Stefania BALINT | 
 ROU                 | 
                55.05 | |
| 34 | 8 | 6 | 392 | Kristina PETKOVA | 
 BUL                 | 
                55.09 | |
| 35 | 5 | 1 | 460 | Camila RODRÍGUEZ | 
 CUB                 | 
                55.24 | |
| 36 | 8 | 3 | 305 | Malena GALVAN | 
 ARG                 | 
                55.37 =PB | |
| 37 | 5 | 5 | 953 | Michelle LIEM | 
 SUI                 | 
                55.42 | |
| 38 | 6 | 1 | 799 | Kenya MATURANA | 
 MEX                 | 
                55.45 | |
| 39 | 6 | 5 | 691 | Eir HLESDOTTIR | 
 ISL                 | 
                55.48 | |
| 40 | 7 | 5 | 644 | Chrysi FOUNTOULAKI | 
 GRE                 | 
                55.54 | |
| 41 | 9 | 3 | 676 | Neeru PAHTAK | 
 IND                 | 
                55.58 | |
| 42 | 7 | 2 | 702 | Elena CAMBIOLO | 
 ITA                 | 
                55.61 | |
| 43 | 6 | 4 | 510 | Ana PRIETO | 
 ESP                 | 
                55.75 | |
| 44 | 8 | 5 | 1065 | Tyhra CHARLES | 
 VIN                 | 
                55.87 | |
| 45 | 7 | 1 | 917 | T'anna LIBURD | 
 SKN                 | 
                55.91 | |
| 46 | 8 | 2 | 958 | Chiara RISI | 
 SUI                 | 
                56.11 | |
| 47 | 8 | 1 | 941 | Jithma WIJETHUNGA | 
 SRI                 | 
                56.16 | |
| 48 | 9 | 6 | 673 | Anuskha KUMBHAR | 
 IND                 | 
                56.52 | |
| 49 | 9 | 2 | 923 | Lina KEDER | 
 SLO                 | 
                56.54 | |
| 50 | 7 | 4 | 800 | Paola MIRELES | 
 MEX                 | 
                56.58 | |
| 51 | 8 | 4 | 390 | Grazielly Kamilly VANDERLEI SENA | 
 BRA                 | 
                56.75 | |
| 52 | 9 | 4 | 1002 | Giuliana ORONÁ | 
 URU                 | 
                58.42 | |
| 5 | 822 | Salamatou HALIDOU HASSANE | 
 NIG                 | 
                DNS | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second