2012 Zomer Olympische Spelen - Atleten
| Atleet | Sport |
|---|---|
 Philipp Adamski | Roeien |
 Chris Adcock | Badminton |
 Jangy Addy | Athletiek |
| Margaret Adeoye | Athletiek |
 Seun Adigun | Athletiek |
 Jonna Adlerteg | Gymnastiek |
| Rebecca Adlington | Aquatics |
 Nathan Adrian | Aquatics |
 Firdasari Adrianti | Badminton |
 Jasper Aerents | Aquatics |
| Sara Aerts | Athletiek |
 Ksenia Afanaseva | Gymnastiek |
 Dragos Agache | Aquatics |
 Alphonsine Agahozo | Aquatics |
 Luca Agamennoni | Roeien |
 Mawussi Agbetoglo | Tafeltennis |
 Yannick Agnel | Aquatics |
 Anna Agrafioti | Zeilen |
 Renzo Agresta | Schermen |
| Mayra Aguiar | Judo |
 Alessandra Aguilar | Athletiek |
 Alberto Aguilar | Athletiek |
| Sandra Aguilar | Gymnastiek |
 Jeinkler Aguirre | Aquatics |
 Marcelo Aguirre | Tafeltennis |