| Event: | Mixed 4 × 400 metres relay |
| Competition: | 2021 World Athletics U20 Championships |
| Venue: | Kasarani Stadium |
| Dates: | 18 August |
| Nations: | 11 |
| Win Value: | 3:19.70 |
| Gold: | Johnson Nnamani Imaobong Nse Uko Opeyemi Deborah Oke Bamidele Ajayi Ella Onojuvwevwo |
| Goldnoc: | NGR |
| Silver: | Michał Wróbel Kornelia Lesiewicz Alicja Kaczmarek Patryk Grzegorzewicz Mateusz Matera
|
| Silvernoc: | POL |
| Bronze: | Barath Sridhar Priya Mohan Summy Kapil Abdul Razak Cherankulangara Rasheed |
| Bronzenoc: | IND |
| Next: | 2022 |
The Mixed 4 × 400 metres relay at the 2021 IAAF World U20 Championships was held at the Kasarani Stadium on 18 August.[1]
The event of 4×400m mixed relay was put for the first time in World Athletics U20 Championships in 2021. Therefore, there was no Championship Record earlier.
Qualification: First 3 of each heat (
Q) plus the 2 fastest times (q) qualified for the final.[2] [3]| Rank | Heat | Nation | Athletes | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 2 | 3:21.66 | , CR | |||
| 2 | 1 | 3:23.36 | , CR | |||
| 3 | 1 | 3:24.15 | , | |||
| 4 | 1 | 3:24.65 | , | |||
| 5 | 1 | 3:24.69 | , | |||
| 6 | 1 | 3:26.62 | , | |||
| 7 | 2 | 3:28.00 | , | |||
| 8 | 2 | 3:30.43 | , | |||
| 9 | 2 | 3:31.90 | ||||
| 2 | ||||||
| 1 |
The final was held on 18 August at 17:15.[4]
| Rank | Lane | Nation | Athletes | Time | Notes | |
|---|---|---|---|---|---|---|
| 5 | 3:19.70 | CR | ||||
| 2 | 3:19.80 | |||||
| 3 | 3:20.60 | |||||
| 4 | 8 | 3:23.04 | ||||
| 5 | 7 | 3:23.98 | ||||
| 6 | 4 | 3:24.26 | ||||
| 7 | 1 | 3:26.39 | ||||
| 8 | 6 | 3:28.51 |