Swimming at the 2009 World Aquatics Championships – Men's 100 metre freestyle


The men's 100 m freestyle at the 2009 World Championships took place on 29 July and the evening of 30 July at the Foro Italico in Rome, Italy.
Existing records at the start of the 2009 Championships were:
Note: During the 4×100 m freestyle relay on Sunday, 26 July 2009, the CR in the 100 m freestyle was bettered 4 times by the following lead-off legs:
  1. Brent Hayden, Canada — 47.77
  2. Stefan Nystrand, Sweden — 47.52
  3. César Cielo, Brazil — 47.39
  4. César Cielo, Brazil — 47.09

    Records

The following records were established during the competition:
DateRoundNameNationalityTimeWRCR
30 JulyFinalCésar Cielo Filho Brazil46.91WRCR

Results

Preliminary heats

Semifinals

Final