| Link | Location | |
|---|---|---|
 | Heino Ophey | Karlsruhe, Germany |
| Luca Oppedisano | Turin, Italy |
| Thomas Oppermann | Berlin, Germany |
| Gabriela Oprea | Bucharest, Romania |
| Adam Or | Hong Kong, Hong Kong |
.jpg){kind=avatar} | Alina Orasanu | Munich, Germany |
| Jouko Orava | Vaasa, Finland |
| Andrés Orduz | Brussels, Belgium |
| Miriam Orejana | Madrid, Spain |
| Michal Orenburg | Tel Aviv, Israel |
 | Diego Oreona | A Coruña, Spain |
| Shawna Organisciak | Denver, Colorado, United States |
| Cherukei Orianwo | London, United Kingdom |
| Vadim Orlov | Moscow, Russian Federation |
| Dominic Orme | Burgess Hill, United Kingdom |
