| W | World Outdoor | 52.34 | Yuliya Pechenkina | RUS | Tula, RUS | |
| J | World/ U-20 | 53.60 | Sydney McLaughlin | USA | 4/27/2018 | Fayetteville, AR |
| C20 | Carifta/ U-20 | 56.22 | Shiann Salmon | JAM | 4/1/2018 | Nassau, BAH |
| PL | JD | # | Athlete | Age | Team | Time |
|---|---|---|---|---|---|---|
| 1 | 343 | FOOTE, SHAQUENA | 18 | JAM | 58.05 | |
| 2 | 366 | THOMAS, JOHNELLE | 18 | JAM | 58.77 | |
| 3 | 489 | BADAL, TAMIA | 19 | TTO | 1:01.34 | |
| 4 | 533 | WOODLEY, TAMARA | 19 | VIN | 1:02.84 | |
| 5 | 169 | HOYTE, RHEA | 18 | BAR | 1:04.36 | |
| 6 | 119 | GIBSON, GABRIELLE | 19 | BAH | 1:05.67 | |
| 7 | 529 | NANTON, ODESHIA | 18 | VIN | 1:06.60 |
| HPL | JD | # | Athlete | Age | Team | Time | Note |
|---|---|---|---|---|---|---|---|
| 1 | 343 | FOOTE, SHAQUENA | 18 | JAM | 58.05 | ||
| 2 | 366 | THOMAS, JOHNELLE | 18 | JAM | 58.77 | ||
| 3 | 489 | BADAL, TAMIA | 19 | TTO | 1:01.34 | ||
| 4 | 533 | WOODLEY, TAMARA | 19 | VIN | 1:02.84 | ||
| 5 | 169 | HOYTE, RHEA | 18 | BAR | 1:04.36 | ||
| 6 | 119 | GIBSON, GABRIELLE | 19 | BAH | 1:05.67 | ||
| 7 | 529 | NANTON, ODESHIA | 18 | VIN | 1:06.60 |