# 2015 World Youth Championships in Athletics – Girls' 400 metres

The girls' 400 metres at the 2015 World Youth Championships in Athletics was held at the Estadio Olímpico Pascual Guerrero in Cali, Colombia from 15 to 17 July 2015.

## Records

Prior to the competition, the following records were as follows.
| World Youth Best | Li Jing (CHN) | 50.01 | Shanghai, China | 18 October 1997 |
| Championship Record | Nawal El Jack (SUD) | 51.19 | Marrakesh, Morocco | 15 July 2005 |
| World Youth Leading | Sydney McLaughlin (USA) | 52.59 | South Plainfield, United States | 30 May 2015 |

## Results
### Round 1

First 3 in each heat (Q) and the next 3 fastest (q) advance to the semifinals.
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 2 | Kyra Constantine | Canada | 53.20 | Q, PB |
| 2 | 3 | Lynna Irby | United States | 53.49 | Q |
| 3 | 5 | Salwa Eid Naser | Bahrain | 53.61 | Q |
| 4 | 6 | Roxana Gómez | Cuba | 53.65 | Q |
| 5 | 2 | Hannah Williams | Great Britain | 53.93 | Q, PB |
| 6 | 3 | Andrea Miklós | Romania | 54.29 | Q, PB |
| 7 | 1 | Symone Mason | United States | 54.41 | Q |
| 8 | 4 | Ivanna Avramchuk | Ukraine | 54.42 | Q, PB |
| 9 | 4 | Victoria Tachinski | Canada | 54.43 | Q |
| 10 | 7 | Erika Krūminaitė | Lithuania | 54.63 | Q, PB |
| 11 | 7 | Catherine Reid | Great Britain | 54.69 | Q |
| 12 | 7 | Dzhois Koba | Ukraine | 54.89 | Q |
| 13 | 5 | Natalia Kaczmarek | Poland | 55.12 | Q |
| 14 | 4 | Rebecca Borga | Italy | 55.22 | Q, PB |
| 15 | 1 | Janet Richard | Malta | 55.36 | Q |
| 16 | 2 | Alexía Polikráti | Greece | 55.38 | Q, PB |
| 17 | 4 | Avon Samuels | Guyana | 55.42 | q, PB |
| 18 | 4 | Dreshanae Rolle | Bahamas | 55.51 | q, PB |
| 19 | 1 | Rin Aoki | Japan | 55.72 | Q |
| 20 | 5 | Dora Filipović | Croatia | 55.77 | Q, SB |
| 21 | 3 | Alessia Tirnetta | Italy | 55.84 | Q |
| 22 | 7 | Mari Drabløs | Norway | 55.84 | q, PB |
| 23 | 4 | Shereen Samson Vallabouy | Malaysia | 56.02 | |
| 24 | 6 | Meleni Rodney | Grenada | 56.05 | Q |
| 25 | 2 | Liang Nuo | China | 56.14 | |
| 26 | 6 | Purity Chepkoech | Kenya | 56.21 | Q, PB |
| 27 | 2 | Ema Chovanová | Slovakia | 56.44 | |
| 28 | 7 | Patricia Mendoza | Mexico | 56.53 | |
| 29 | 2 | Patrīcija Roshofa | Latvia | 56.62 | |
| 30 | 5 | Sofía Bencomo | Mexico | 56.71 | |
| 31 | 3 | Andrea Serrano | Spain | 56.84 | |
| 32 | 1 | Cristina Balan | Romania | 57.08 | |
| 33 | 6 | Satanya Wright | Jamaica | 57.11 | |
| 34 | 6 | D'Nia Freeman | Bahamas | 57.34 | |
| 35 | 6 | Artesha Richardson | Anguilla | 57.72 | PB |
| 36 | 5 | Tamara Polić | Serbia | 57.85 | |
| 37 | 4 | Ruth Peña | Spain | 58.62 | |
| 38 | 5 | Janiel Moore | Jamaica | 59.20 | |
| 39 | 1 | Nomatter Kapfudzaruwa | Zimbabwe | 59.40 | |
| 40 | 7 | Jarly Marín | Colombia | 59.41 | |
| 41 | 3 | Xiang Miaochan | China | 1:00.14 | |
| 42 | 3 | Rebecca Guidi | San Marino | 1:02.32 | PB |
| 43 | 1 | Kellandie Bully | Dominica | 1:02.81 | |
| – | 1 | Tania Caicedo | Ecuador | DQ | |
| – | 3 | Lilian Reyes | Dominican Republic | DQ | |
| – | 7 | Jane Njoki Theuri | Kenya | DQ | |
| – | 2 | Natricia Hooper | Guyana | DQ | |
| – | 6 | Luna Jović | Serbia | DQ | |
| – | 5 | Yamani Mudiyanselage | Sri Lanka | DNS | |

### Semifinal

First 2 in each heat (Q) and the next 2 fastest (q) advance to the final.
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 2 | Lynna Irby | United States | 52.77 | Q, PB |
| 2 | 1 | Kyra Constantine | Canada | 52.88 | Q, PB |
| 3 | 3 | Salwa Eid Naser | Bahrain | 52.99 | Q |
| 4 | 1 | Catherine Reid | Great Britain | 53.20 | Q, PB |
| 5 | 1 | Symone Mason | United States | 53.38 | q |
| 6 | 2 | Hannah Williams | Great Britain | 53.52 | Q, PB |
| 7 | 3 | Roxana Gómez | Cuba | 53.61 | Q |
| 8 | 3 | Andrea Miklós | Romania | 53.93 | q, PB |
| 9 | 2 | Natalia Kaczmarek | Poland | 54.25 | PB |
| 10 | 3 | Dzhois Koba | Ukraine | 54.26 | PB |
| 11 | 2 | Ivanna Avramchuk | Ukraine | 54.43 | |
| 12 | 3 | Victoria Tachinski | Canada | 54.77 | |
| 13 | 1 | Janet Richard | Malta | 55.37 | |
| 14 | 1 | Erika Krūminaitė | Lithuania | 55.51 | |
| 15 | 2 | Dreshanae Rolle | Bahamas | 55.58 | |
| 16 | 2 | Alexía Polikráti | Greece | 55.68 | |
| 16 | 1 | Dora Filipović | Croatia | 55.68 | SB |
| 18 | 1 | Rin Aoki | Japan | 55.69 | |
| 19 | 2 | Alessia Tirnetta | Italy | 55.91 | |
| 20 | 1 | Mari Drabløs | Norway | 56.33 | |
| 21 | 2 | Meleni Rodney | Grenada | 56.36 | |
| 22 | 3 | Rebecca Borga | Italy | 56.56 | |
| 23 | 3 | Purity Chepkoech | Kenya | 57.87 | |
| – | 3 | Avon Samuels | Guyana | DQ | |

### Final

| Rank | Name | Nationality | Time | Note |
| | Salwa Eid Naser | Bahrain | 51.50 | WYL |
| | Lynna Irby | United States | 51.79 | PB |
| | Catherine Reid | Great Britain | 52.25 | PB |
| 4 | Kyra Constantine | Canada | 52.44 | PB |
| 5 | Roxana Gómez | Cuba | 52.79 | PB |
| 6 | Hannah Williams | Great Britain | 53.24 | PB |
| 7 | Andrea Miklós | Romania | 53.29 | PB |
| 8 | Symone Mason | United States | 53.55 | |