2021 World Athletics U20 Championships – Women's 400 metres hurdles
# 2021 World Athletics U20 Championships – Women's 400 metres hurdles

The women's 400 metres hurdles at the 2021 World Athletics U20 Championships was held at the Kasarani Stadium on 19 and 22 August.

## Records

Standing records prior to the 2021 World Athletics U20 Championships :

| World U20 Record | Sydney McLaughlin (USA) | 53.60 | Fayetteville, United States | 27 April 2018 |
| - | - | - | - | - |
| Championship Record | Lashinda Demus (USA) | 54.70 | Kingston, Jamaica | 19 July 2002 |
| World U20 Leading | Ashton Lindley (USA) | 56.74 | Eugene, United States | 12 June 2021 |

## Results

### Heats

Qualification: First 2 of each heat (Q) and the 2 fastest times (q) qualified for the final.

| Rank | Heat | Name | Nationality | Time | Note |
| - | - | - | - | - | - |
| 1 | 1 | Heidi Salminen | Finland | 58.12 | Q, PB |
| 2 | 3 | Savannah Sutherland | Canada | 58.45 | Q |
| 3 | 1 | Ludivine Aubert | France | 58.46 | Q |
| 4 | 2 | Garriel White | Jamaica | 58.65 | Q |
| 5 | 1 | Angelica Ghergo | Italy | 58.84 | q |
| 6 | 3 | Moseiha Bridgen | Jamaica | 58.88 | Q |
| 7 | 3 | Maria Tarabanskaya | Authorised Neutral Athletes | 59.18 | q |
| 8 | 2 | Alicja Kaczmarek | Poland | 59.32 | Q |
| 9 | 2 | Jada van Staden | South Africa | 59.33 | |
| 10 | 3 | Aada Aho | Finland | 59.50 | |
| 11 | 2 | Ilana Hanssens | Belgium | 59.60 | |
| 12 | 1 | Ester Bendová | Czech Republic | 59.91 | |
| 13 | 3 | Rahela Leščak | Croatia | 1:00.20 | |
| 14 | 2 | Anna Konstantina Chatzipourgani | Greece | 1:00.67 | |
| 15 | 2 | Neža Dolenc | Slovenia | 1:01.37 | |
| 16 | 3 | Sofia Lavreshina | Portugal | 1:01.53 | |
| 17 | 2 | Andrea Švecová | Slovakia | 1:02.60 | |
| 18 | 1 | Agnes Ngumbi | Kenya | 1:02.65 | PB |
| 19 | 1 | Lara Bezgovšek | Slovenia | 1:08.29 | |
| | 1 | Martha Rasmussen | Denmark | DQ | TR22.6.1 |
| | 1 | Sarah Ochigbo | Nigeria | DNS | |
| | 3 | Charlize Eilerd | South Africa | DNS | |

### Final

The final was held on 22 August at 15:00.

| Rank | Lane | Name | Nationality | Time | Note |
| - | - | - | - | - | - |
| | 5 | Heidi Salminen | Finland | 56.94 | PB |
| | 6 | Ludivine Aubert | France | 57.16 | PB |
| | 3 | Savannah Sutherland | Canada | 57.27 | PB |
| 4 | 2 | Angelica Ghergo | Italy | 57.69 | PB |
| 5 | 1 | Maria Tarabanskaya | Authorised Neutral Athletes | 57.96 | PB |
| 6 | 7 | Alicja Kaczmarek | Poland | 58.62 | |
| 7 | 8 | Moseiha Bridgen | Jamaica | 58.64 | |
| | 4 | Garriel White | Jamaica | DNS | DNS |
