This article details the qualifying phase for triathlon at the 2020 Summer Olympics (postponed to 2021[1] due to the COVID-19 pandemic).
The competition at these Games will comprise a total of 110 athletes coming from their respective NOCs; each has been allowed to enter a maximum of three.
[2] Ten NOCs will each earn four quota spots (two per gender) through mixed team qualification.
The top seven NOCs in the ITU mixed relay rankings of 31 March 2020 will qualify.
Two final places in each gender are awarded by Tripartite Commission invitation.