The following is the qualification system and qualified athletes for the judo at the 2019 Pan American Games competitions.
A total of 140 judokas qualified to compete at the games.
The top nine athletes (one per NOC) in each weight category's ranking after four qualification tournaments qualified along with one spot per category for the host nation, Peru.
Each nation can enter a maximum of 14 athletes (seven men and seven women).
[1] The following is a list of qualified countries and athletes per event.