| Lucia ORŠULOVÁ | SVK | 15 Races |
| Margarita OSA | LAT | 2 Races |
| Inna OSIPENKO-RADOMSKA | AZE | 5 Races |
| Inna OSIPENKO-RODOMSKA | AZE | 12 Races |
| Viktoriya OSOKINA | UZB | 6 Races |
| Jazmin OSORIO | MEX | 1 Races |
| Nazar OSTAPCHUK | UKR | 7 Races |
| Anja OSTERMAN | SLO | 58 Races |
| Petter OSTROM | SWE | 3 Races |
| Sandra OSTROWSKA | POL | 14 Races |
| Miguel OTERINO | ESP | 2 Races |
| Abderrahmane OULDKADDOUR | ALG | 5 Races |
| Lara OUTÓN | ESP | 4 Races |
| Sara OUZANDE | ESP | 37 Races |
| Juan OVANDO | MEX | 3 Races |