Fastest swim long course 50 metres freestyle (male)
- Who
- Cesar Cielo Filho
- What
- 20.91 second(s)
- Where
- Brazil (Sao Paulo,)
- When
- 18 December 2009
The fastest long course 50 metres freestyle swim by a male is 20.91 seconds, achieved by César Cielo Filho (Brazil) on 18 December 2009 at the Brazilian Championships in São Paulo, Brazil.