The following is the qualification system and qualified athletes for the swimming at the 2019 Pan American Games competitions.
As Host Country, Peru automatically will qualify 18 male and 18 female competitors in the pool.
[1] Each National Olympic Committee may use proven swim times attained during the qualification period of those swimmers who have met the qualifying standards established by the UANA for the 2019 Pan American Games at a competition recognized by the FINA from the official list of approved qualifying competitions for the 18th FINA World Aquatics Championships held in Gwangju, Korea.
Countries not qualified can enter one male and one female swimmer through the universality rule.
[1] The time standards (all long course) for the 2019 Pan American Games are: A total of 37 countries qualified swimmers or received universality spots.