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

The boys' 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.
Christopher Taylor of Jamaica won the event. His time of 45.27 seconds was a world age-15 best.

## Records

Prior to the competition, the following records were as follows.
| World Youth Best | Obea Moore (USA) | 45.14 | Santiago, Chile | 2 September 1995 |
| Championship Record | Kirani James (GRN) | 45.24 | Bressanone, Italy | 10 July 2009 |
| World Youth Leading | Christopher Taylor (JAM) | 45.55 | Kingston, Jamaica | 13 June 2015 |

## Results
### Round 1

First 3 in each heat (Q) and the next 6 fastest (q) advance to the semifinals.
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 6 | Josephus Lyles | United States | 46.26 | Q |
| 2 | 2 | Anthony Zambrano | Colombia | 46.27 | Q, PB |
| 3 | 2 | Christopher Taylor | Jamaica | 46.30 | Q |
| 4 | 6 | Loïc Prévot | France | 46.67 | Q, PB |
| 5 | 5 | Keshun Reed | United States | 46.98 | Q |
| 6 | 5 | Chandan Bauri | India | 47.15 | Q |
| 7 | 4 | Louis Stenmark | Australia | 47.17 | Q |
| 8 | 2 | Manato Sasaki | Japan | 47.27 | Q |
| 9 | 3 | Jamal Walton | Cayman Islands | 47.35 | Q |
| 10 | 1 | Karabo Sibanda | Botswana | 47.46 | Q |
| 11 | 5 | Edwin Ngeeti | Kenya | 47.47 | Q |
| 12 | 3 | Marvin Schlegel | Germany | 47.57 | Q |
| 13 | 5 | Xu Haoran | China | 47.59 | q, PB |
| 14 | 3 | Ryota Kitahara | Japan | 47.69 | Q |
| 15 | 6 | Josphat Kipngetich Ngeno | Kenya | 47.72 | Q |
| 16 | 2 | Roger Ordaz | Mexico | 47.74 | q, PB |
| 17 | 5 | Edgar Ramírez | Mexico | 47.88 | q, PB |
| 18 | 6 | Vladimir Aceti | Italy | 47.95 | q |
| 19 | 1 | Wu Yuang | China | 48.02 | Q |
| 20 | 5 | Florian Colon Marti | Germany | 48.07 | q |
| 21 | 2 | Tymoteusz Zimny | Poland | 48.09 | q, PB |
| 22 | 1 | Miquel Shepper | Suriname | 48.30 | Q, PB |
| 23 | 1 | Anthony Carpenter | Jamaica | 48.31 | |
| 24 | 3 | Nathan Friginette | Canada | 48.38 | PB |
| 24 | 2 | Bayraktar Berkay Çalık | Turkey | 48.38 | PB |
| 26 | 4 | André Marich | South Africa | 48.41 | Q |
| 27 | 4 | Anej Zupanc | Slovenia | 48.44 | Q, PB |
| 28 | 5 | Florin Gaspar | Romania | 48.45 | PB |
| 29 | 4 | Manuel Guijarro | Spain | 48.54 | |
| 29 | 6 | Austris Karpinskis | Latvia | 48.54 | |
| 29 | 2 | Dlamini Ndzingeko | Eswatini | 48.54 | PB |
| 32 | 6 | Rudi Pretorius | Namibia | 48.55 | PB |
| 33 | 1 | Petar Melnjak | Croatia | 48.59 | |
| 33 | 3 | Taha Hussein Yaseen | Iraq | 48.59 | |
| 33 | 5 | Nico Garea | Austria | 48.59 | PB |
| 36 | 4 | Kagiso Moyuthu | Botswana | 48.72 | PB |
| 37 | 1 | Mihaíl Pappás | Greece | 48.85 | |
| 38 | 1 | Andrés Hernández | Colombia | 49.02 | PB |
| 39 | 3 | Rodney Griffin | United States Virgin Islands | 49.09 | PB |
| 40 | 6 | Nicolae Daroczi | Romania | 49.12 | |
| 41 | 2 | Álvaro Sierra | Spain | 49.30 | |
| 42 | 4 | Kristjan Joosep | Estonia | 49.34 | |
| 43 | 3 | Michaiah Robinson | Bermuda | 49.49 | |
| 44 | 4 | Michael Aono | Canada | 50.18 | |
| 45 | 6 | Lou Wai Un | Macau | 51.75 | PB |
| 46 | 1 | Sebastian Acuña | Ecuador | 52.01 | |
| – | 3 | Christopher Melenciano | Dominican Republic | DQ | |
| – | 4 | Luis Charles | Dominican Republic | DQ | |

### Semifinal

First 2 in each heat (Q) and the next 2 fastest (q) advance to the final.
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 1 | Christopher Taylor | South Africa | 45.30 | Q, WYL |
| 2 | 1 | Josephus Lyles | United States | 45.93 | Q |
| 3 | 1 | Karabo Sibanda | Botswana | 46.53 | q |
| 4 | 3 | Anthony Zambrano | Colombia | 46.76 | Q |
| 5 | 2 | Keshun Reed | United States | 46.77 | Q |
| 6 | 2 | Louis Stenmark | Australia | 46.78 | Q, PB |
| 7 | 1 | Manato Sasaki | Japan | 46.85 | q, PB |
| 8 | 3 | Jamal Walton | Cayman Islands | 46.97 | Q |
| 9 | 3 | Loïc Prévot | France | 47.03 | |
| 10 | 2 | Chandan Bauri | India | 47.41 | |
| 11 | 1 | Xu Haoran | China | 47.44 | PB |
| 12 | 1 | Tymoteusz Zimny | Poland | 47.53 | PB |
| 13 | 2 | Ryota Kitahara | Japan | 47.85 | |
| 14 | 2 | Marvin Schlegel | Germany | 47.92 | |
| 15 | 3 | Wu Yuang | China | 48.11 | |
| 16 | 1 | André Marich | South Africa | 48.34 | |
| 17 | 3 | Roger Ordaz | Mexico | 48.59 | |
| 17 | 2 | Vladimir Aceti | Italy | 48.59 | |
| 19 | 3 | Florian Colon Marti | Germany | 48.84 | |
| 20 | 2 | Edgar Ramírez | Mexico | 49.01 | |
| 21 | 3 | Edwin Ngeeti | Kenya | 49.26 | |
| 22 | 2 | Josphat Kipngetich Ngeno | Kenya | 49.86 | |
| 23 | 1 | Anej Zupanc | Slovenia | 49.93 | |
| – | 3 | Miquel Shepper | Suriname | DQ | |

### Final

| Rank | Name | Nationality | Time | Note |
| | Christopher Taylor | Jamaica | 45.27 | WYL |
| | Josephus Lyles | United States | 45.46 | PB |
| | Keshun Reed | United States | 45.96 | |
| 4 | Jamal Walton | Cayman Islands | 45.99 | PB |
| 5 | Karabo Sibanda | Botswana | 46.03 | PB |
| 6 | Louis Stenmark | Australia | 46.29 | PB |
| 7 | Anthony Zambrano | Colombia | 46.57 | |
| 8 | Manato Sasaki | Japan | 47.54 | |