| Link | Location | |
|---|---|---|
 | Natalie Ortiz | Redlands, California, United States |
| Sebastian Ortlepp | Munich, Germany |
 | Alex Ortner | London, United Kingdom |
| Markus Ortner | Nürnberg, Germany |
| Henrik P Orvin | Gråsten, Denmark |
| Ron Osawa | Hong Kong, Hong Kong |
| Ikenna Osayi | Berlin, Germany |
| James Osborn | London, United Kingdom |
| Petrucci Oscar | Milan, Italy |
 | Konstantins Oševerovs | Riga, Latvia |
| Taito Oshima | Tokyo, Japan |
 | Kenji Oshio | Tokyo, Japan |
| Siarhei Oshyn | Minsk, Belarus |
| Piotr Osinski | Munich, Germany |
 | Inga Osovsky | New York, New York, United States |
