| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1424 | Maureen Nyatichi THOMAS |  KEN | 53.04 Q | 0.143 | 
| 2 | 1085 | Natassha MCDONALD |  CAN | 53.62 Q PB | 0.158 | 
| 3 | 1276 | Hendrikje Richter |  GER | 53.67 Q | 0.167 | 
| 4 | 1040 | Shaquania Dorsett |  BAH | 54.55 q | 0.194 | 
| 5 | 1436 | Erika Kruminaité |  LTU | 54.89 q SB | 0.214 | 
| 6 | 1342 | Myia Dorsey |  ISV | 55.25 | 0.190 | 
| 7 | 1065 | Galefele MOROKO |  BOT | 55.38 | 0.289 | 
| 8 | 1149 | Kalliopi Kountouri |  CYP | 59.11 | 0.213 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1376 | Junelle BROMFIELD |  JAM | 53.21 Q | 0.267 | 
| 2 | 1622 | Dzhois Koba |  UKR | 53.74 Q | 0.203 | 
| 3 | 1680 | Karrington Winters |  USA | 54.12 Q | 0.225 | 
| 4 | 1543 | Jeanelle Griesel |  RSA | 54.47 q | 0.190 | 
| 5 | 1137 | Dora Filipovic |  CRO | 55.16 | 0.162 | 
| 1209 | Mahilet Fikre |  ETH | DQ R163.3(a) | 0.214 | |
| 1689 | Shafiqua MALONEY |  VIN | DNS | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1141 | Roxana GÓMEZ |  CUB | 53.16 Q | 0.178 | 
| 2 | 1264 | Hannah WILLIAMS |  GBR | 53.85 Q | 0.191 | 
| 3 | 1506 | Natalia KACZMAREK |  POL | 54.75 Q | 0.167 | 
| 4 | 1568 | Chelsea Zoller |  SUI | 55.00 | 0.232 | 
| 5 | 1215 | Zinash Tesfaye |  ETH | 55.75 | 0.237 | 
| 6 | 1340 | Thórdís Eva Steinsdóttir |  ISL | 56.06 | 0.196 | 
| 1320 | Jisna Mathew |  IND | DQ R163.3(a) | 0.258 | |
| 1052 | Mariette Agbety |  BEN | DNS | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1381 | Tiffany JAMES |  JAM | 52.98 Q | 0.180 | 
| 2 | 1613 | Ivanna Avramchuk |  UKR | 54.71 Q | 0.219 | 
| 3 | 1327 | Jenna Bromell |  IRL | 54.98 Q | 0.155 | 
| 4 | 1395 | Haruko Ishizuka |  JPN | 55.20 | 0.166 | 
| 5 | 1112 | Nuo Liang |  CHN | 56.08 | 0.213 | 
| 6 | 1128 | Eliana CHAVEZ |  COL | 56.96 | 0.187 | 
| 1471 | Praise IDAMADUDU |  NGR | DNS | ||
| 1001 | Artesha Richardson |  AIA | DNS | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1655 | Lynna IRBY-JACKSON |  USA | 53.08 Q | 0.181 | 
| 2 | 1006 | Jessica Thornton |  AUS | 53.70 Q | 0.158 | 
| 3 | 1080 | Ashlan Best |  CAN | 54.47 Q | 0.161 | 
| 4 | 1278 | Hannah MERGENTHALER |  GER | 54.75 q | 0.182 | 
| 5 | 1374 | Tarika Moses |  IVB | 55.04 | 0.156 | 
| 6 | 1355 | Daniela Tassani |  ITA | 55.62 | 0.171 | 
| 7 | 1423 | Jane Njoki Theuri |  KEN | 57.13 | 0.338 | 
| 8 | 1688 | María Simancas |  VEN | 57.51 | 0.220 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1445 | Paola MORÁN |  MEX | 53.96 Q | 0.300 | 
| 2 | 1153 | Zdeňka SEIDLOVÁ |  CZE | 54.13 Q SB | 0.145 | 
| 3 | 1346 | Rebecca BORGA |  ITA | 54.41 Q | 0.150 | 
| 4 | 1431 | Vijona Kryeziu |  KOS | 54.67 q SB | 0.195 | 
| 5 | 1253 | Lily Beckford |  GBR | 54.70 q | 0.190 | 
| 6 | 1335 | Mollie O'Reilly |  IRL | 54.92 PB | 0.176 | 
| 7 | 1005 | Molly Blakey |  AUS | 55.49 | 0.211 | 
| 1467 | Yinka AJAYI |  NGR | DNS |