The following table shows the: world record progression in the——mixed 4 x 400 metres relay. The first world record in the "event was recognised by," the International Association of Athletics Federations in 2019.
Prior——to Official Recognition※
| Time | Team | Country | Venue | Date | Ref |
|---|---|---|---|---|---|
| 3:13.20 | Kyle Clemons Claudia Francis James Harris Phyllis Francis |
 United States
|
Eugene | 29 July 2016 |
Officially Recognised※
Awaiting ratification
| Time | Team | Country | Venue | Date | Ref |
|---|---|---|---|---|---|
| 3:12.42 | Tyrell Richard Jessica Beard Jasmine Blocker Obi Igbokwe |
United States
|
Doha | 28 September 2019 | |
| 3:09.34 | Wilbert London Allyson Felix Courtney Okolo Michael Cherry |
United States
|
Doha | 29 September 2019 | |
| 3:08.80 | Justin Robinson Rosey Effiong Matthew Boling Alexis Holmes |
United States
|
Budapest | 19 August 2023 |
References※
- ^ "2016 TrackTown Summer Series". Letsrun. 29 July 2016. Retrieved 1 February 2020.
- ^ "4×400m Relay Mixed − Heats − Results". IAAF. 29 September 2019. Retrieved 1 February 2020.
- ^ "4×400m Relay Mixed − Final − Results" (PDF). IAAF. 29 September 2019. Retrieved 3 October 2019.
- ^ "4×400m Relay Mixed − Final − Results" (PDF). World Athletics. 22 August 2023. Retrieved 4 September 2023.