Saint Lucia competed at the 2020 Summer Olympics in Tokyo, Japan.

The country's planning for the 2020 Games began shortly after the conclusion of the 2016 Summer Olympics, with Saint Lucia Olympic Committee president Fortuna Belrose noting that some athletes had already expressed interest and submitted programmes.

[3][4] The COVID-19 pandemic has affected preparations, training, and qualification efforts; Belrose and the SLOC have committed to supporting athletes in qualifying for the postponed Games.

Saint Lucian athletes further achieved the entry standards, either by qualifying time or by world ranking, in the following track and field events (up to a maximum of 3 athletes in each event):[5][6] Saint Lucia received an invitation from the Tripartite Commission to send sailors competing in the men's Laser and women's Laser Radial to the Olympic regatta.

[7] M = Medal race; EL = Eliminated – did not advance into the medal race Saint Lucia 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.