2012 Zomer Olympische Spelen - Atleten
| Atleet | Sport |
|---|---|
 Angelika Ouedraogo | Aquatics |
 Elodie Ouédraogo | Athletiek |
 Aziz Ouhadi | Athletiek |
 Rajiv Ouseph | Badminton |
 Nathan Outteridge | Zeilen |
 Vladislava Ovcharenko | Athletiek |
 Konstantin Ovchinnikov | Judo |
| Scott Overall | Athletiek |
 Heiner Oviedo | Taekwondo |
 Raymond Ovinou | Judo |
 Dimitrij Ovtcharov | Tafeltennis |
| Francesca Owen | Aquatics |
 Ger Owens | Zeilen |
| Abiodun Oyepitan | Athletiek |
 Gantumur Oyungerel | Aquatics |
 Yoshimi Ozaki | Athletiek |
 Ilham Tanui Özbilen | Athletiek |
| Sinta Ozolina-Kovala | Athletiek |
| Çigdem Özyaman | Schieten |
 Fortunato Luis Pacavira | Canoe/Kayak |
 Tara Pacheco | Zeilen |
 Rodrigo Pacheco | Badminton |
| Nicolás Pacheco | Schieten |
| Raul Pacheco | Athletiek |
 Natalia Pacierpnik | Canoe/Kayak |