Olimpiadas de Verano 2020 - Deportistas
| Deportista | Deporte |
|---|---|
 Berihu Aregawi | Atletismo |
 Sandra Arenas | Atletismo |
| Eider Arévalo | Atletismo |
 Samantha Arevalo | Aquatics |
 Carlos Arevalo | Canoe/Kayak |
| Alberto Arévalo | Aquatics |
 Caroline Arft | Canoe/Kayak |
 Ferhat Arican | Gimnasia |
| Polat Kemboi Arikan | Atletismo |
| Okyanus Arikan | Vela |
 Alexandra Aristoteli | Gimnasia |
 Oscar Ariza | Aquatics |
 Nada Arkaji | Aquatics |
 Armani Sl Z | |
 Lizzie Armanto | Patineta |
 Emily Armstrong | Aquatics |
 Joseph Armstrong | Aquatics |
| Adrià Arnaus | Golf |
| Nikias Arndt | Ciclismo |
| Marco Arop | Atletismo |
 Brian Agustin Arregui | Boxeo |
 Jarod Arroyo | Aquatics |
| Andrés Arroyo | Atletismo |
 Jovana Arsic | Remo |
| Andrea Arsovic | Tiro |