2020 Zomer Olympische Spelen - Atleten
| Atleet | Sport |
|---|---|
 Berihu Aregawi | Athletiek |
 Sandra Arenas | Athletiek |
| Eider Arévalo | Athletiek |
 Samantha Arevalo | Aquatics |
 Carlos Arevalo | Canoe/Kayak |
| Alberto Arévalo | Aquatics |
 Caroline Arft | Canoe/Kayak |
 Ferhat Arican | Gymnastiek |
| Polat Kemboi Arikan | Athletiek |
| Okyanus Arikan | Zeilen |
 Alexandra Aristoteli | Gymnastiek |
 Oscar Ariza | Aquatics |
 Nada Arkaji | Aquatics |
 Armani Sl Z | |
 Lizzie Armanto | Skateboarden |
 Emily Armstrong | Aquatics |
 Joseph Armstrong | Aquatics |
| Adrià Arnaus | Golf |
| Nikias Arndt | Wielrennen |
| Marco Arop | Athletiek |
 Brian Agustin Arregui | Boksen |
 Jarod Arroyo | Aquatics |
| Andrés Arroyo | Athletiek |
 Jovana Arsic | Roeien |
| Andrea Arsovic | Schieten |