Olimpiadas de Verano 2020 - Deportistas
| Deportista | Deporte |
|---|---|
 Harriet Jones | Aquatics |
 Stephen Jones | Remo |
 William Jones | Vela |
 Song Jong Ho | Tiro |
| Jin Jong-Oh | Tiro |
| Shim Jong-Sub | Atletismo |
| Lee Jongjun | Tiro |
| Chon Jongwon | Escalada Deportiva |
 Cecilia Jonsson | Vela |
| Joo-Hwan | |
| Oh Joohan | Atletismo |
| Ahn Joon-Soo | |
 Thomas Jordier | Atletismo |
 Fernando Dayan Jorge Enriquez | Canoe/Kayak |
 Ivana Jorovic | Tenis |
 Snæfriður Jórunnardóttir | Aquatics |
 Jason Joseph | Atletismo |
 Gulfam Joseph | Tiro |
| Gémima Joseph | Atletismo |
| Vincent Jourdenais | Canoe/Kayak |
 Joanna Józwik | Atletismo |
 Emma Jørgensen | Canoe/Kayak |
| Lee Ju-Ho | Aquatics |
 Juan | |
| Jessica Judd | Atletismo |