The following is the qualification system and qualified countries for the Modern pentathlon at the 2019 Pan American Games competitions.
A total of 64 Modern pentathletes will qualify to compete.
Each nation may enter a maximum of 6 athletes (three per gender).
The host nation, Peru, automatically qualifies the four athletes (two per gender).
Each country competing at the 2018 South American Games and the 2018 Central American and Caribbean Games along with Canada and the USA qualified one athlete per individual event.