# 2024 World Athletics U20 Championships – Men's 800 metres

The men's 800 metres at the 2024 World Athletics U20 Championships was held at the Estadio Atlético de la VIDENA in Lima, Peru on 27, 28 and 30 August 2024.

## Records

U20 standing records prior to the 2024 World Athletics U20 Championships were as follows:
| Record | Athlete & Nationality | Mark | Location | Date |
| World U20 Record | Nijel Amos (BOT) | 1:41.73 | London, United Kingdom | 9 August 2012 |
| Championship Record | Emmanuel Wanyonyi (KEN) | 1:43.76 | Nairobi, Kenya | 22 August 2021 |
| World U20 Leading | Peyton Craig (AUS) | 1:44.11 | Paris, France | 9 August 2024 |

## Results
### Heats

The first 3 athletes in each heat (Q) and the next 6 fastest (q) qualified to the semi-finals.

#### Heat 1

| Rank | Athlete | Nation | Time | Notes |
| 1 | Henry Jonas | Great Britain | 1:49.89 | Q |
| 2 | John O'Reilly | Canada | 1:49.92 | Q |
| 3 | Ayoub Elfakhar | Morocco | 1:50.16 | Q |
| 4 | Phanuel Koech | Kenya | 1:50.20 | q |
| 5 | Amado Amador | Mexico | 1:50.30 | q |
| 6 | Lucas Jara | Chile | 1:51.41 | |
| 7 | Nuno Cordeiro | Portugal | 1:52.33 | |
| 8 | Giancarlo Bravo | Peru | 1:53.34 | PB |

#### Heat 2

| Rank | Athlete | Nation | Time | Notes |
| 1 | General Ayansa | Ethiopia | 1:49.48 | Q |
| 2 | William Rabjohns | Great Britain | 1:51.20 | Q |
| 3 | Davide De Rosa | Italy | 1:51.34 | Q |
| 4 | Uriel Muñoz | Argentina | 1:51.35 | |
| 5 | Ibrahim Abdalla | Qatar | 1:51.67 | |
| 6 | João Brito | Portugal | 1:52.78 | |
| 7 | Hayden Todd | Australia | 1:57.41 | |

#### Heat 3

| Rank | Athlete | Nation | Time | Notes |
| 1 | Yanis Vanlanduyt | France | 1:51.18 | Q |
| 2 | Peyton Craig | Australia | 1:51.43 | Q |
| 3 | Togo Yoshizawa | Japan | 1:51.49 | Q |
| 4 | Jory Teixeira | Luxembourg | 1:52.26 | |
| 5 | Seif Hafsi | Algeria | 1:52.68 | |
| 6 | Sahil Khan | India | 2:01.32 | |
| – | Žan Ogrinc | Slovenia | DNS | |

#### Heat 4

| Rank | Athlete | Nation | Time | Notes |
| 1 | Mohamed Amri | Tunisia | 1:49.21 | Q, PB |
| 2 | Kelvin Koech | Kenya | 1:49.28 | Q |
| 3 | Daniel Watcke | United States | 1:49.86 | Q |
| 4 | Matthew Burnett | South Africa | 1:50.16 | q |
| 5 | Carlos Lara | Brazil | 1:50.56 | q |
| 6 | Ian Mas | Honduras | 1:56.17 | |
| – | Thomas Cowan | New Zealand | DQ | TR17.2.3 |
| – | Louis Buschbeck | Germany | DNS | |

#### Heat 5

| Rank | Athlete | Nation | Time | Notes |
| 1 | Michael Long | United States | 1:50.53 | Q |
| 2 | Ko Ochiai | Japan | 1:50.67 | Q |
| 3 | Boubaker Bouhain | Algeria | 1:50.75 | Q |
| 4 | Karabelo Motlhabedi | South Africa | 1:50.91 | |
| 5 | Mohamed Chiha | Tunisia | 1:51.38 | |
| 6 | Robin Gloor | Switzerland | 1:51.80 | |
| 7 | Luca Borzi | Italy | 1:52.11 | |

#### Heat 6

| Rank | Athlete | Nation | Time | Notes |
| 1 | Hatim Ait Oulghazi | Qatar | 1:49.98 | Q |
| 2 | Robin Lefebvre | Canada | 1:50.04 | Q |
| 3 | Noam Mamu | Israel | 1:50.20 | Q |
| 4 | Tom Stöber | Germany | 1:50.32 | q |
| 5 | Miguel Pantojas | Puerto Rico | 1:50.75 | q |
| 6 | James Ford | New Zealand | 1:50.89 | |
| 7 | Jānis Stūrītis | Latvia | 1:51.09 | |

### Semi-finals

The first 2 athletes in each heat (Q) and the next 2 fastest (q) qualified to the semi-final.

#### Heat 1

| Rank | Athlete | Nation | Time | Notes |
| 1 | Peyton Craig | Australia | 1:47.31 | Q |
| 2 | Kelvin Koech | Kenya | 1:47.53 | Q |
| 3 | Daniel Watcke | United States | 1:47.68 | q |
| 4 | Yanis Vanlanduyt | France | 1:47.75 | PB |
| 5 | Robin Lefebvre | Canada | 1:49.03 | |
| 6 | Carlos Lara | Brazil | 1:50.32 | PB |
| 7 | Togo Yoshizawa | Japan | 1:52.86 | |
| 8 | Davide De Rosa | Italy | 1:54.42 | |

#### Heat 2

| Rank | Athlete | Nation | Time | Notes |
| 1 | General Ayansa | Ethiopia | 1:47.28 | Q |
| 2 | Hatim Ait Oulghazi | Qatar | 1:47.51 | Q |
| 3 | John O'Reilly | Canada | 1:47.67 | q, PB |
| 4 | Noam Mamu | Israel | 1:48.46 | |
| 5 | Matthew Burnett | South Africa | 1:49.09 | |
| 6 | Mohamed Amri | Tunisia | 1:49.27 | |
| 7 | Tom Stöber | Germany | 1:53.59 | |
| 8 | William Rabjohns | Great Britain | 1:56.19 | |

#### Heat 3

| Rank | Athlete | Nation | Time | Notes |
| 1 | Phanuel Koech | Kenya | 1:48.24 | Q |
| 2 | Ko Ochiai | Japan | 1:48.26 | Q |
| 3 | Henry Jonas | Great Britain | 1:48.28 | |
| 4 | Michael Long | United States | 1:49.05 | |
| 5 | Boubaker Bouhain | Algeria | 1:49.07 | |
| 6 | Miguel Pantojas | Puerto Rico | 1:51.08 | |
| 7 | Amado Amador | Mexico | 1:51.13 | |
| 8 | Ayoub Elfakhar | Morocco | 1:52.90 | |

### Final

| Rank | Athlete | Nation | Time | Notes |
| | General Ayansa | Ethiopia | 1:46.86 | |
| | Peyton Craig | Australia | 1:46.95 | |
| | Ko Ochiai | Japan | 1:47.03 | |
| 4 | John O'Reilly | Canada | 1:47.15 | PB |
| 5 | Phanuel Koech | Kenya | 1:47.46 | |
| 6 | Hatim Ait Oulghazi | Qatar | 1:47.96 | |
| 7 | Kelvin Koech | Kenya | 1:48.95 | |
| 8 | Daniel Watcke | United States | 1:50.55 | |