The men's 400 metres event at the 2008 World Junior Championships in Athletics was held in Bydgoszcz, Poland, at Zawisza Stadium on 8, 9 and 10 July. [1] [2]
| Gold | Marcus Boyd |
| Silver | Kirani James |
| Bronze | O'Neal Wilder |
10 July
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| Marcus Boyd | 45.53 | |||
| Kirani James | 45.70 | |||
| O'Neal Wilder | 45.76 | |||
| 4 | Kurt Mulcahy | 46.54 | ||
| 5 | Niklas Zender | 46.78 | ||
| 6 | Daniel Harper | 47.20 | ||
| 7 | Jordan McGrath | 47.81 | ||
| Brian Gregan | DQ | IAAF rule 163.3 |
9 July
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Kirani James | 46.55 | Q | |
| 2 | Marcus Boyd | 46.88 | Q | |
| 3 | Petr Vaněk | 47.22 | ||
| 4 | Marcell Deák Nagy | 47.43 | ||
| 5 | Jānis Leitis | 47.51 | ||
| 6 | Awad El-Karim Makki | 48.21 | ||
| 7 | Juan Lewis | 48.30 | ||
| 8 | Hideyuki Hirose | 48.30 | ||
| 9 | Akihiro Urano | 48.34 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Niklas Zender | 46.78 | Q | |
| 2 | Brian Gregan | 46.88 | Q | |
| 3 | Nigel Levine | 47.14 | ||
| 4 | Zwede Hewitt | 47.36 | ||
| 5 | Vladimir Krasnov | 47.38 | ||
| 6 | Silvester Kirwa Meli | 47.73 | ||
| 7 | Pétros Kiriakídis | 48.03 | ||
| 8 | Ismail Al-Sabani | 48.04 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | O'Neal Wilder | 46.08 | Q | |
| 2 | Kurt Mulcahy | 46.56 | Q | |
| 3 | Daniel Harper | 46.81 | q | |
| 4 | Jordan McGrath | 47.13 | q | |
| 5 | Rondell Bartholomew | 47.60 | ||
| 6 | Juan Carlos Vega | 47.94 | ||
| 7 | Mauritz Kåshagen | 48.22 | ||
| 8 | Curtis Kock | 48.36 |
8 July
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Niklas Zender | 47.34 | Q | |
| 2 | Juan Lewis | 47.78 | Q | |
| 3 | Marcell Deák Nagy | 47.85 | Q | |
| 4 | Arkadiusz Wojno | 48.17 | ||
| 5 | Bacar Jannot | 48.38 | ||
| 6 | Alejandro Guerrero | 49.20 | ||
| 7 | Alessandro Pedrazzoli | 50.80 | ||
| Victor Isaiah | DQ | IAAF rule 163.3 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Hideyuki Hirose | 47.86 | Q | |
| 2 | Jānis Leitis | 47.95 | Q | |
| 3 | Pétros Kiriakídis | 48.24 | Q | |
| 4 | Darnell Greig | 48.42 | ||
| 5 | Yonas Al-Hosah | 48.47 | ||
| 6 | Roman Starukh | 48.90 | ||
| 7 | Juraj Mokráš | 49.29 | ||
| 8 | Noah Akwu | 49.45 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | O'Neal Wilder | 46.82 | Q | |
| 2 | Juan Carlos Vega | 48.03 | Q | |
| 3 | Curtis Kock | 48.21 | Q | |
| 4 | Kevin Williams | 48.42 | ||
| 5 | Denys Teslenko | 48.49 | ||
| 6 | Marc Orozco | 48.61 | ||
| 7 | Tom Chouquet | 49.06 | ||
| 8 | Marvin Augustine | 52.08 | ||
| 9 | Peter Semper | 54.87 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Kirani James | 46.53 | Q | |
| 2 | Daniel Harper | 47.18 | Q | |
| 3 | Jordan McGrath | 47.38 | Q | |
| 4 | Vladimir Krasnov | 47.73 | q | |
| 5 | Domenico Fontana | 47.99 | ||
| 6 | Pascal Nabow | 48.06 | ||
| 7 | La'Sean Pickstock | 48.54 | ||
| 8 | Akino Ming | 49.08 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Brian Gregan | 47.32 | Q | |
| 2 | Silvester Kirwa Meli | 47.34 | Q | |
| 3 | Ismail Al-Sabani | 47.39 | Q | |
| 4 | Petr Vaněk | 47.78 | q | |
| 5 | Jakub Krzewina | 47.97 | ||
| 6 | Rasmus Olsen | 48.46 | ||
| 7 | Hafidhou Attoumani | 48.56 | ||
| 8 | Fadi Ba-Hafs | 51.53 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Marcus Boyd | 47.56 | Q | |
| 2 | Rondell Bartholomew | 47.85 | Q | |
| 3 | Awad El-Karim Makki | 47.93 | Q | |
| 4 | Erik Voncina | 48.20 | ||
| 5 | Zoltán Kovács | 48.25 | ||
| 6 | Endrik Zilberstein | 48.58 | ||
| 7 | José Antonio Flores | 49.36 | ||
| 8 | Isoa Me | 49.40 | ||
| 9 | Wong Man Hou | 54.57 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Kurt Mulcahy | 47.35 | Q | |
| 2 | Nigel Levine | 47.38 | Q | |
| 3 | Zwede Hewitt | 47.45 | Q | |
| 4 | Mauritz Kåshagen | 47.75 | q | |
| 5 | Bereket Desta | 47.80 | ||
| 6 | Akihiro Urano | 48.07 | ||
| 7 | Arnaud Froidmont | 48.47 | ||
| 8 | Fabian Norgrove | 49.10 |
According to an unofficial count, 58 athletes from 42 countries participated in the event.