Swimming at the 2024 World Aquatics Championships – Mixed 4 × 100 metre medley relay

The Mixed 4 × 100 metre medley relay competition at the 2024 World Aquatics Championships was held on 14 February 2024.

Records
Prior to the competition, the existing world and championship records were as follows.

Heats
The heats were started at 10:47.

Final
The final was started at 20:48.