| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1960 | Taylor MANSON |  USA | 52.68 Q | 0.153 | 
| 2 | 1748 | Davicia Patterson |  IRL | 53.20 Q | 0.190 | 
| 3 | 1932 | Stella Wonruku |  UGA | 53.55 Q | 0.204 | 
| 4 | 1565 | Sharelle Samuel |  CAN | 53.62 Q PB | 0.152 | 
| 5 | 1582 | Nuo Liang |  CHN | 54.33 q SB | 0.174 | 
| 6 | 1597 | Angie Melisa Palacios |  COL | 54.42 q PB | 0.257 | 
| 7 | 1876 | Marlie VILJOEN |  RSA | 59.01 | 0.186 | 
| 8 | 1826 | Aishath Himna HASSAN |  MDV | 59.76 NU20R | 0.182 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1808 | Mary MORAA |  KEN | 52.85 Q PB | 0.250 | 
| 2 | 1871 | Andrea MIKLÓS |  ROU | 53.14 Q | 0.199 | 
| 3 | 1758 | Elisabetta VANDI |  ITA | 53.51 Q PB | 0.182 | 
| 4 | 1646 | Frehiywot WONDIE |  ETH | 53.59 Q | 0.238 | 
| 5 | 1553 | Giovana dos Santos |  BRA | 54.35 q | 0.191 | 
| 6 | 1739 | Ciara Deely |  IRL | 54.69 | 0.148 | 
| 7 | 1656 | Mette BAAS |  FIN | 55.42 | 0.157 | 
| 1979 | Pamela Milano |  VEN | DNS | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1510 | Ella CONNOLLY |  AUS | 52.99 Q SB | 0.176 | 
| 2 | 1549 | Tiffani MARINHO |  BRA | 53.18 Q | 0.214 | 
| 3 | 1600 | Roxana GÓMEZ |  CUB | 53.19 Q | 0.204 | 
| 4 | 1578 | Shalysa WRAY |  CAY | 54.48 Q | 0.172 | 
| 5 | 1761 | Camilla Pitzalis |  ITA | 54.59 PB | 0.223 | 
| 6 | 1620 | Milagros DURÁN |  DOM | 55.56 | 0.187 | 
| 7 | 1872 | Nicola Gibbon |  RSA | 57.90 | 0.197 | 
| 1917 | Rae-Anne Serville |  TTO | DNF | 0.248 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1731 | Hima DAS |  IND | 52.25 Q | 0.170 | 
| 2 | 1776 | Stacey Ann WILLIAMS |  JAM | 52.71 Q SB | 0.164 | 
| 3 | 1561 | Ashlan Best |  CAN | 53.91 Q SB | 0.163 | 
| 4 | 1617 | Fiordaliza COFIL |  DOM | 54.13 Q | 0.196 | 
| 5 | 1587 | Yu Zhou |  CHN | 54.49 q SB | 0.174 | 
| 6 | 1579 | Martina WEIL |  CHI | 54.52 | 0.180 | 
| 7 | 1935 | Tetiana KAYSEN |  UKR | 57.14 | 0.250 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1733 | Jisna Mathew |  IND | 54.32 Q | 0.215 | 
| 2 | 1718 | Amanda Crawford |  GRN | 54.37 Q | 0.397 | 
| 3 | 1900 | Veronica VANCARDO |  SUI | 54.93 Q | 0.152 | 
| 4 | 1697 | Laura Kaufmann |  GER | 54.96 Q | 0.202 | 
| 5 | 1961 | Symone MASON |  USA | 55.66 | 0.183 | 
| 6 | 1644 | Mahilet Fikre |  ETH | 55.88 | 0.222 | 
| 7 | 1830 | Maria Alejandra Carmona |  NCA | 58.39 PB | 0.235 | 
| 8 | 1812 | Patrīcija Karlīna Roshofa |  LAT | 60.08 | 0.216 |