The following is the qualification system for the triathlon at the 2019 Pan American Games event and qualified athletes/quotas.
A total of 70 triathletes (35 per gender) will qualify to compete.
The host nation (Peru) automatically qualified four athletes (two per gender).
[1] The top placed mixed relay team at the 2018 South American Games and 2018 Central American and Caribbean Games each qualified two athletes per gender.
A country may enter the mixed relay competition if it has qualified at least two male and two female triathletes.