| Link | Location |
|---|
 | Adam Or | Hong Kong, Hong Kong |
.jpg?preferred_lang=jp) | Alina Orasanu | Munich, Germany |
| Jouko Orava | Vaasa, Finland |
 | Marta Orbitowska | Szczecin, Poland |
| Andrés Orduz | Brussels, Belgium |
| Miriam Orejana | Madrid, Spain |
 | Diego Oreona | A Coruña, Spain |
| Shawna Organisciak | Denver, Colorado, United States |
| Cherukei Orianwo | London, United Kingdom |
| Vadim Orlov | Moscow, Russia |
| Dominic Orme | Burgess Hill, United Kingdom |
| Ryan Orndorf | Minneapolis-United Health, Minnesota, United States |
| Christoph Ornth | München, Germany |
| Veruska Oropeza | San Francisco, California, United States |
| Erich Orozco | Atlanta, Georgia, United States |
