2016 Zomer Olympische Spelen - Atleten
| Atleet | Sport |
|---|---|
 Gundegmaa Otryad | Schieten |
 Jeanette Ottesen | Aquatics |
 Abdelkebir Ouaddar | Ruiter |
| Samira Ouass | Gewichtheffen |
 Angelika Ouedraogo | Aquatics |
 Oussama Oueslati | Taekwondo |
| Aziz Ouhadi | Athletiek |
 Sofiane Oumiha | Boksen |
| Sarah Ourahmoune | Boksen |
 Rajiv Ouseph | Badminton |
 Sahnoune Oussama | Aquatics |
 Djibo Idrissa Ousseini | Athletiek |
 Luiz Felipe Outerelo | Aquatics |
 Nathan Outteridge | Zeilen |
 Evgeniya Ovchinnikova | Ruiter |
 Emily Overholt | Aquatics |
 Raymond Ovinou | Judo |
 Dimitrij Ovtcharov | Tafeltennis |
 Flings Owusu-Agyapong | Athletiek |
 Shiho Oyama | Golf |
 Ilham Tanui Özbilen | Athletiek |
| Bekir Ozlu | Judo |
 Sinta Ozolina-Kovala | Athletiek |
| Ilke Özyüksel | Moderne Vijfkamp |
| Nikita Pablo | Aquatics |