The following is the list of the number of Salvadoran competitors participating in the Games: El Salvador received a universality slot from the World Athletics to send a male athlete to the Olympics.

[2] El Salvador entered one boxer to compete in the women's featherweight category at the Olympic tournament.

With the cancellation of the 2021 Pan American Qualification Tournament in Buenos Aires, Yamileth Solorzano received a spare berth declined by one of the original entries, as the next highest-ranked boxer vying for qualification from the Americas in the IOC's Boxing Task Force Rankings.

Salvadoran sailors qualified one boat for each of the following classes through the class-associated World Championships, and the continental regattas.

[3] M = Medal race; EL = Eliminated – did not advance into the medal race El Salvador received a universality invitation from FINA to send two top-ranked swimmers (one per gender) in their respective individual events to the Olympics, based on the FINA Points System of June 28, 2021.