| Link | Location | |
|---|---|---|
 | Shigenari Ohnuma | Tokyo, Japan |
 | Toshiyuki Ohtomo | Kyoto, Japan |
| Thomas Oichtner | Vienna (Vösendorf), Austria |
| Sami Ojanpää | Seinäjoki, Finland |
| Kennedy Ojie | London, United Kingdom |
 | Yuki Okamoto | Tokyo, Japan |
| Takaya Okano | Tokyo, Japan |
 | Jay Oke | London, United Kingdom |
| Darya Okhokhonina | Москва, Russia |
| Alevtina Okhrimenko | Moscow, Russia |
| Morten Okking-Dam Hansen | Copenhagen, Denmark |
 | Joost Okkinga | Amsterdam, Netherlands |
| Junpei Okoshi | Tokyo, Japan |
| Nilufer Okucu | Brussels, Belgium |
| Oladipupo Olaniba | London, United Kingdom |
