The men's 4 × 100 metres relay event at the 2016 IAAF World U20 Championships was held at Zdzisław Krzyszkowiak Stadium on 23 and 24 July.
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
Champion Allison Ari Cogdell Kahmari Montgomery Wilbert London III | Omphemetse Poo Baboloki Thebe Karabo Sibanda Xholani Talane | Anthony Carpenter Sean Bailey Terry Ricardo Thomas Christopher Taylor Aykeeme Francis |
| World Junior Record | 3:01.09 | Grosseto, Italy | 18 July 2004 | ||
| Championship Record | 3:01.09 | Grosseto, Italy | 18 July 2004 | ||
| World Junior Leading | 3:08.52 | Mannheim, Germany | 26 June 2016 |
Qualification: First 3 of each heat (Q) plus the 2 fastest times (q) qualified for the final.[1]
| Rank | Heat | Nation | Athletes | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 1 | 3:03.75 | Q, WU20L | |||
| 2 | 1 | 3:07.59 | Q, SB | |||
| 3 | 2 | 3:07.87 | Q, SB | |||
| 4 | 2 | 3:08.50 | Q, SB | |||
| 5 | 1 | Anthony Carpenter, Sean Bailey, Aykeeme Francis, Terry Ricardo Thomas | 3:08.80 | Q, SB | ||
| 6 | 1 | Kiran Murugan, Harsh Kumar, Pankaj Pankaj, Amoj Jacob | 3:08.89 | q, NU20R | ||
| 7 | 1 | Joshua St. Clair, Dwight St Hilare, Judah Taylor, Kashief King | 3:08.91 | q, SB | ||
| 8 | 2 | Umberto Mezzaluna, Vladimir Aceti, Brayan Lopez, Alessandro Sibilio | 3:09.42 | Q, SB | ||
| 9 | 1 | Mateusz Rzeźniczak, Cezary Mirosław, Kamil Mroczek, Tymoteusz Zimny | 3:09.42 | SB | ||
| 10 | 1 | Nattapong Kongkraphan, Witthawat Thumcha, Phitchaya Sunthonthuam, Vitsanu Phosri | 3:10.08 | |||
| 11 | 2 | Alexander Doom, Julian Cobbaert, Dylan Owusu, Gerbrand Huts | 3:10.78 | SB | ||
| 12 | 2 | Ilja Petrušenko, Austris Karpinskis, Valerijs Valinšcikovs, Maksims Sinčukovs | 3:10.85 | NU20R | ||
| 13 | 1 | Nathaniel Mechler, Michael Petersen, Callum MacNab, Nathan Friginette | 3:12.05 | SB | ||
| 2 | Sultan Hussain Khalufi, Sabir Said Essa, Saeed Hassan Olwani, Ahmed Saleh Mahda | 163.3(a) | ||||
| 2 |
| Rank | Nation | Athletes | Time | Notes | |
|---|---|---|---|---|---|
| 3:02.39 | WU20L | ||||
| 3:02.81 | AU20L | ||||
| 3:04.83 | SB | ||||
| 4 | 3:07.02 | ||||
| 5 | 3:08.13 | SB | |||
| 6 | 3:08.28 | SB | |||
| 7 | 3:09.14 | ||||
| R163.3(a)[3] |