# 2000 World Junior Championships in Athletics – Men's 800 metres

The men's 800 metres event at the 2000 World Junior Championships in Athletics was held in Santiago, Chile, at Estadio Nacional Julio Martínez Prádanos on 17, 18 and 20 October.

## Medalists

| Gold | Nicholas Wachira Kenya |
| Silver | Florent Lacasse France |
| Bronze | Antonio Manuel Reina Spain |

## Results
### Final

20 October
| Rank | Name | Nationality | Time |
| | Nicholas Wachira | Kenya | 1:47.16 |
| | Florent Lacasse | France | 1:47.61 |
| | Antonio Manuel Reina | Spain | 1:47.90 |
| 4 | Salem Amer Al-Badri | Qatar | 1:48.51 |
| 5 | Arnoud Okken | Netherlands | 1:49.10 |
| 6 | Abdelkabir Louraïbi | Morocco | 1:49.88 |
| 7 | Jason Stewart | New Zealand | 1:50.34 |
| 8 | Aldwyn Sappleton | Jamaica | 1:50.63 |
| 9 | Abdul Rahman Suleiman | Qatar | 1:50.92 |

### Semifinals

18 October

#### Semifinal 1

| Rank | Name | Nationality | Time | Notes |
| 1 | Florent Lacasse | France | 1:48.13 | Q |
| 2 | Nicholas Wachira | Kenya | 1:48.30 | Q |
| 3 | Salem Amer Al-Badri | Qatar | 1:48.44 | Q |
| 4 | Mohamed Osman | Saudi Arabia | 1:51.19 | |
| 5 | Aldwyn Sappleton | Jamaica | 1:52.56 | q |
| 6 | Jako Burgers | South Africa | 1:53.40 | |
| 7 | Fernando Almeida | Portugal | 1:54.52 | |
| 8 | Amine Laâlou | Morocco | 3:00.54 | |

#### Semifinal 2

| Rank | Name | Nationality | Time | Notes |
| 1 | Antonio Manuel Reina | Spain | 1:49.06 | Q |
| 2 | Arnoud Okken | Netherlands | 1:49.42 | Q |
| 3 | Abdelkabir Louraïbi | Morocco | 1:49.80 | Q |
| 4 | Abdul Rahman Suleiman | Qatar | 1:50.14 | q |
| 5 | Jason Stewart | New Zealand | 1:50.27 | q |
| 6 | Vincent Kemboi | Kenya | 1:50.29 | |
| 7 | Nick Devenport | United States | 1:52.81 | |
| 8 | Tom Vanchaze | Belgium | 1:54.65 | |

### Heats

17 October

#### Heat 1

| Rank | Name | Nationality | Time | Notes |
| 1 | Florent Lacasse | France | 1:51.05 | Q |
| 2 | Abdul Rahman Suleiman | Qatar | 1:51.39 | Q |
| 3 | Vincent Kemboi | Kenya | 1:51.43 | Q |
| 4 | Amine Laâlou | Morocco | 1:51.55 | q |
| 5 | Manuel Olmedo | Spain | 1:51.65 | |
| 6 | Hamza Abdenouz | Algeria | 1:51.69 | |
| 7 | Primesh Kumar | India | 1:56.80 | |
| 8 | Setefano Mika | Samoa | 2:02.72 | |

#### Heat 2

| Rank | Name | Nationality | Time | Notes |
| 1 | Arnoud Okken | Netherlands | 1:49.81 | Q |
| 2 | Tom Vanchaze | Belgium | 1:50.15 | Q |
| 3 | Aldwyn Sappleton | Jamaica | 1:50.36 | Q |
| 4 | Abdelkabir Louraïbi | Morocco | 1:50.80 | q |
| 5 | Jako Burgers | South Africa | 1:51.43 | q |
| 6 | Dominik Erhardt | Germany | 1:51.95 | |
| 7 | Ismail Ahmed Ismail | Sudan | 1:53.14 | |
| 8 | Ebrima Ceesay | Gambia | 1:57.98 | |

#### Heat 3

| Rank | Name | Nationality | Time | Notes |
| 1 | Nicholas Wachira | Kenya | 1:50.91 | Q |
| 2 | Salem Amer Al-Badri | Qatar | 1:51.13 | Q |
| 3 | Fernando Almeida | Portugal | 1:52.21 | Q |
| 4 | Mandla Nkosi | South Africa | 1:56.01 | |
| 5 | Raymond Adams | United Kingdom | 1:56.93 | |
| 6 | Banzragch Batmunkh | Mongolia | 1:59.68 | |

#### Heat 4

| Rank | Name | Nationality | Time | Notes |
| 1 | Antonio Manuel Reina | Spain | 1:50.84 | Q |
| 2 | Nick Devenport | United States | 1:51.15 | Q |
| 3 | Mohamed Osman | Saudi Arabia | 1:51.45 | Q |
| 4 | Jason Stewart | New Zealand | 1:51.57 | q |
| 5 | Anthony Lilley | Ireland | 1:52.48 | |
| 6 | Moussa Aoudjali | Chad | 2:00.73 | |
| 7 | Florent Battistel | Monaco | 2:04.40 | |

## Participation

According to an unofficial count, 29 athletes from 24 countries participated in the event.
* Algeria (1)
* Belgium (1)
* Chad (1)
* France (1)
* Gambia (1)
* Germany (1)
* India (1)
* Ireland (1)
* Jamaica (1)
* Kenya (2)
* Monaco (1)
* Mongolia (1)
* Morocco (2)
* Netherlands (1)
* New Zealand (1)
* Portugal (1)
* Qatar (2)
* Samoa (1)
* Saudi Arabia (1)
* South Africa (2)
* Spain (2)
* Sudan (1)
* United Kingdom (1)
* United States (1)