Fastest 50 metre long course backstroke swim (female)
- Who
- Kaylee McKeown
- What
- 26.86 second(s)
- Where
- Hungary (Budapest)
- When
- 20 October 2023
The fastest swim long course 50 metres backstroke (female) is 26.86 seconds, achieved by Kaylee McKeown (Australia) at the World Aquatics Swimming World Cup in Budapest, Hungary, on 20 October 2023.
McKeown became the first woman to hold the 50 m, 100 m and 200 m backstroke long course world records in Budapest. She broke her own 100 m world record the next day.