Mixed 4 × 400 metres relay world record progression

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	Participants	Ref
3:13.20	United States	United States	Eugene	29 July 2016	Kyle Clemons Claudia Francis James Harris Phyllis Francis	[1]

Officially Recognised

  Awaiting ratification

Time	Team	Country	Venue	Date	Participants	Ref
3:12.42	United States	United States	Doha	28 September 2019	Tyrell Richard Jessica Beard Jasmine Blocker Obi Igbokwe	[2]
3:09.34	United States	United States	Doha	29 September 2019	Wilbert London Allyson Felix Courtney Okolo Michael Cherry	[3]

References

1. "2016 TrackTown Summer Series". Letsrun. 29 July 2016. Retrieved 1 February 2020.
2. "4×400m Relay Mixed − Heats − Results". IAAF. 29 September 2019. Retrieved 1 February 2020.
3. "4×400m Relay Mixed − Final − Results" (PDF). IAAF. 29 September 2019. Retrieved 3 October 2019.