| Link | Location |
|---|
 | Bartley O'Connor | Dublin, Ireland |
| REBECCA O'DEA | Swindon, United Kingdom |
| Michael O'Donnell | Dublin, Ireland |
| Michael O'Meara | Minneapolis, Minnesota, United States |
| Adis O'Neill | Mirimar, Florida, United States |
| Anthony O'Neill | Dublin, Ireland |
| Samantha O'Neill | Swindon, United Kingdom |
| Conor O'Reilly | Dublin, Ireland |
| Colm O'Shea | Galway, Ireland |
| Conor O'Sullivan | Dublin/London, Ireland |
| John O’Brien | Boston, Massachusetts, United States |
| Sagar Oak | Munich, Germany |
| Haruka Oba | Tokyo, Japan |
| Florian Obermayer | Munich, Germany |
| Chris Oberndorfer | Duvall, Washington, United States |
