The men's long jump at the 2021 World Athletics U20 Championships was held at the Kasarani Stadium on 20 August.

Records Standing records prior to the 2021 World Athletics U20 ChampionshipsWorld U20 Record8.35Cheboksary, Russia20 June 2012Championship Record8.20Plovdiv, Bulgaria9 August 1990World U20 Leading7.98Tallinn, Estonia16 July 2021

Results Final The final was held on 20 August at 16:37.

Rank Name Nationality Round Mark Notes 1 2 3 4 5 6 Erwan Konaté 7.75 7.80 7.90 8.12 8.00 7.98 8.12 , Jhon Berrío 7.97 7.11 7.59 7.38 7.64 7.68 7.97 Kavian Kerr 7.14 7.90 7.51 7.78 7.90 4 Gabriel Boza 7.83 5.13 7.83 5 Bryan Mucret 7.60 7.69 7.38 7.69 6 Gor Beglaryan 7.23 7.60 7.20 7.69 7.69 7 Jeremy Zammit 7.37 7.21 7.42 7.21 7.19 7.42 8 Tomáš Kratochvíl 4.47 7.34 7.29 6.94 7.34 9 Dennis Mwangi Maina 6.71 7.27 6.95 7.27 10 Carlo Santacà 6.72 7.26 7.26 11 Jason Donovan Tito 7.24 7.24 12 Abdud-Daiyaan Wyngaard 7.19 7.03 7.18 7.19 13 Jordan Turner 4.17 4.17

References