2020 Zomer Olympische Spelen - Atleten
| Atleet | Sport |
|---|---|
 Harriet Jones | Aquatics |
 Trevor Jones | Roeien |
 Luuka Jones | Canoe/Kayak |
 Song Jong Ho | Schieten |
| Jin Jong-Oh | Schieten |
| Shim Jong-Sub | Athletiek |
| Lee Jongjun | Schieten |
| Chon Jongwon | Klimsport |
 Cecilia Jonsson | Zeilen |
| Joo-Hwan | |
| Oh Joohan | Athletiek |
| Ahn Joon-Soo | |
 Thomas Jordier | Athletiek |
 Fernando Dayan Jorge Enriquez | Canoe/Kayak |
 Ivana Jorovic | Tennis |
 Snæfriður Jórunnardóttir | Aquatics |
 Gulfam Joseph | Schieten |
 Jason Joseph | Athletiek |
| Gémima Joseph | Athletiek |
| Vincent Jourdenais | Canoe/Kayak |
 Joanna Józwik | Athletiek |
 Emma Jørgensen | Canoe/Kayak |
| Lee Ju-Ho | Aquatics |
 Juan | |
| Jessica Judd | Athletiek |