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 DateWorld U20 Record1:41.73London, United Kingdom9 August 2012Championship Record1:43.76Nairobi, Kenya22 August 2021World U20 Leading1:44.11Paris, France9 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 Notes1Henry Jonas1:49.892John O'Reilly1:49.923Ayoub Elfakhar1:50.164Phanuel Koech1:50.205Amado Amador1:50.306Lucas Jara1:51.417Nuno Cordeiro1:52.3381:53.34
Heat 2 Rank Athlete Nation Time Notes1General Ayansa1:49.482William Rabjohns1:51.203Davide De Rosa1:51.344Uriel Muñoz1:51.355Ibrahim Abdalla1:51.676João Brito1:52.787Hayden Todd1:57.41
Heat 3 Rank Athlete Nation Time Notes1Yanis Vanlanduyt1:51.182Peyton Craig1:51.433Togo Yoshizawa1:51.494Jory Teixeira1:52.265Seif Hafsi1:52.686Sahil Khan2:01.32Žan Ogrinc
Heat 4 Rank Athlete Nation Time Notes1Mohamed Amri1:49.21, 2Kelvin Koech1:49.283Daniel Watcke1:49.864Matthew Burnett1:50.165Carlos Lara1:50.566Ian Mas1:56.17Thomas CowanLouis Buschbeck
Heat 5 Rank Athlete Nation Time Notes1Michael Long1:50.532Ko Ochiai1:50.673Boubaker Bouhain1:50.754Karabelo Motlhabedi1:50.915Mohamed Chiha1:51.386Robin Gloor1:51.807Luca Borzi1:52.11
Heat 6 Rank Athlete Nation Time Notes1Hatim Ait Oulghazi1:49.982Robin Lefebvre1:50.0431:50.204Tom Stöber1:50.325Miguel Pantojas1:50.756James Ford1:50.897Jānis Stūrītis1:51.09
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 Notes1Peyton Craig1:47.312Kelvin Koech1:47.533Daniel Watcke1:47.684Yanis Vanlanduyt1:47.755Robin Lefebvre1:49.036Carlos Lara1:50.327Togo Yoshizawa1:52.868Davide De Rosa1:54.42
Heat 2 Rank Athlete Nation Time Notes1General Ayansa1:47.282Hatim Ait Oulghazi1:47.513John O'Reilly1:47.67, 41:48.465Matthew Burnett1:49.096Mohamed Amri1:49.277Tom Stöber1:53.598William Rabjohns1:56.19
Heat 3 Rank Athlete Nation Time Notes1Phanuel Koech1:48.242Ko Ochiai1:48.263Henry Jonas1:48.284Michael Long1:49.055Boubaker Bouhain1:49.076Miguel Pantojas1:51.087Amado Amador1:51.138Ayoub Elfakhar1:52.90
Final Rank Athlete Nation Time NotesGeneral Ayansa1:46.86Peyton Craig1:46.95Ko Ochiai1:47.034John O'Reilly1:47.155Phanuel Koech1:47.466Hatim Ait Oulghazi1:47.967Kelvin Koech1:48.958Daniel Watcke1:50.55
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