Fastest swim short course relay 4 x 100 metres medley (female)
- Who
- Regan Smith, Lilly King , Gretchen Walsh , Kate Douglass
- What
- 3:40.41 minute(s):second(s)
- Where
- Hungary (Budapest)
- When
- 15 December 2024
The fastest swim short course relay 4 x 100 metres medley (female) is 3 minutes 40.41 seconds and was achieved by the USA (Regan Smith, Lilly King, Gretchen Walsh and Kate Douglass) in Budapest, Hungary, on 15 December 2024.
The USA won gold in record-breaking style at the World Aquatics Swimming Championships (25m) 2024 in Budapest. Lead-off swimmer Regan Smith also broke the short course 100 m backstroke world record with a time of 54.02 seconds.