| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | 
|---|---|---|---|---|---|---|---|
| 1 | 1 | 4 | 1136 | Femke BOL | 
 NED                 | 
                53.39 Q | |
| 2 | 1 | 3 | 599 | Kemi ADEKOYA | 
 BRN                 | 
                53.56 Q AR | |
| 3 | 1 | 1 | 1008 | Rushell CLAYTON | 
 JAM                 | 
                53.97 Q | |
| 4 | 2 | 3 | 1018 | Andrenette KNIGHT | 
 JAM                 | 
                54.21 Q | .205 | 
| 5 | 2 | 1 | 1431 | Dalilah MUHAMMAD | 
 USA                 | 
                54.21 Q | .207 | 
| 6 | 1 | 5 | 850 | Jessie KNIGHT | 
 GBR                 | 
                54.27 Q | |
| 7 | 3 | 3 | 987 | Ayomide FOLORUNSO | 
 ITA                 | 
                54.30 Q | |
| 8 | 2 | 5 | 1420 | Shamier LITTLE | 
 USA                 | 
                54.40 Q | |
| 9 | 3 | 1 | 887 | Carolina KRAFZIK | 
 GER                 | 
                54.53 Q | .521 | 
| 10 | 1 | 2 | 1026 | Janieve RUSSELL | 
 JAM                 | 
                54.53 Q | .528 | 
| 11 | 4 | 1 | 790 | Viivi LEHIKOINEN | 
 FIN                 | 
                54.65 Q | |
| 12 | 2 | 2 | 1383 | Anna COCKRELL | 
 USA                 | 
                54.68 Q | |
| 13 | 3 | 5 | 1366 | Anna RYZHYKOVA | 
 UKR                 | 
                54.70 Q | |
| 14 | 5 | 1 | 1000 | Rebecca SARTORI | 
 ITA                 | 
                54.82 q PB | |
| 15 | 4 | 3 | 1145 | Cathelijn PEETERS | 
 NED                 | 
                54.95 Q | |
| 16 | 2 | 4 | 1369 | Viktoriya TKACHUK | 
 UKR                 | 
                55.05 Q | |
| 17 | 4 | 5 | 690 | Nikoleta JÍCHOVÁ | 
 CZE                 | 
                55.10 Q | |
| 18 | 3 | 4 | 553 | Hanne CLAES | 
 BEL                 | 
                55.13 Q | |
| 19 | 5 | 5 | 1119 | Noura ENNADI | 
 MAR                 | 
                55.21 q | .204 | 
| 20 | 5 | 3 | 1266 | Zenéy GELDENHUYS | 
 RSA                 | 
                55.21 q | .208 | 
| 21 | 4 | 4 | 1182 | Line KLOSTER | 
 NOR                 | 
                55.23 Q | |
| 22 | 5 | 4 | 874 | Eileen DEMES | 
 GER                 | 
                55.29 q PB | |
| 23 | 3 | 2 | 1196 | Gianna WOODRUFF | 
 PAN                 | 
                55.31 Q | |
| 24 | 6 | 4 | 510 | Sarah CARLI | 
 AUS                 | 
                55.76 | |
| 25 | 4 | 2 | 629 | Savannah SUTHERLAND | 
 CAN                 | 
                55.85 Q | |
| 26 | 7 | 4 | 1239 | Fatoumata Binta DIALLO | 
 POR                 | 
                56.03 | |
| 27 | 6 | 1 | 1296 | Yasmin GIGER | 
 SUI                 | 
                56.16 | |
| 28 | 6 | 5 | 914 | Dimitra GNAFAKI | 
 GRE                 | 
                56.18 SB | |
| 29 | 7 | 5 | 618 | Brooke OVERHOLT | 
 CAN                 | 
                56.20 | |
| 30 | 7 | 1 | 938 | Janka MOLNÁR | 
 HUN                 | 
                56.21 | |
| 31 | 5 | 2 | 575 | Chayenne DA SILVA | 
 BRA                 | 
                56.25 | |
| 32 | 6 | 2 | 993 | Eleonora MARCHIANDO | 
 ITA                 | 
                56.27 | |
| 33 | 6 | 3 | 677 | Zurian HECHAVARRÍA | 
 CUB                 | 
                56.43 | |
| 34 | 7 | 3 | 1319 | Moa GRANAT | 
 SWE                 | 
                56.61 | |
| 35 | 7 | 2 | 1201 | Robyn BROWN | 
 PHI                 | 
                56.83 | |
| 36 | 8 | 5 | 1285 | Agata ZUPIN | 
 SLO                 | 
                57.62 | |
| 37 | 8 | 2 | 1061 | Ami YAMAMOTO | 
 JPN                 | 
                57.76 | |
| 38 | 8 | 3 | 542 | Lena PRESSLER | 
 AUT                 | 
                57.90 | |
| 39 | 8 | 4 | 1060 | Eri UTSUNOMIYA | 
 JPN                 | 
                57.98 | |
| 40 | 9 | 4 | 1332 | Yanique HAYE-SMITH | 
 TKS                 | 
                1:00.08 | |
| 41 | 8 | 1 | 1187 | Portia BING | 
 NZL                 | 
                1:06.97 | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second