| Name |
Country |
| Haine Ogata |
JPN |
| Inci Ogut |
TUR |
| Chiaki Okadaue |
JPN |
| Martina Okalova |
SVK |
| Kyoka Okamura |
JPN |
| Akiko Okuda |
USA |
| Ayaka Okuno |
JPN |
| Barbara Oliveira |
BRA |
| Giuliana Olmos |
MEX |
| Akiko Omae |
JPN |
| Erica Oosterhout |
USA |
| Romina Oprandi |
SUI |
| Paula Ormaechea |
ARG |
| Maja Ornberg |
SWE |
| Mari Osaka |
JPN |
| Naomi Osaka |
JPN |
| Maria Camila Osorio Serrano |
COL |
| Jelena Ostapenko |
LAT |
| Fanny Ostlund |
SWE |
| Whitney Osuigwe |
USA |
| Sara Ottomano |
SUI |
| Melanie Oudin |
USA |
| Sofie Oyen |
BEL |
| Risa Ozaki |
JPN |
| Michika Ozeki |
JPN |
| Justine Ozga |
GER |
| Pemra Ozgen |
TUR |