Swimming at the 1999 Pan American Games – Men's 100 metre freestyle

The men's 100 metre freestyle competition of the swimming events at the 1999 Pan American Games took place on 4 August at the Pan Am Pool. The last Pan American Games champion was Gustavo Borges of Brazil.

This race consisted of two lengths of the pool, both lengths being in freestyle.

Results
All times are in minutes and seconds.

Heats
The first round was held on August 4.

B Final
The B final was held on August 4.

A Final
The A final was held on August 4.