Sportler
| M/F | Land | Alter | Geburtstag | ||
|---|---|---|---|---|---|
| Nina O'Brien | F |  | USA | 29.11.1997 | |
| Seamus O'Connor | M |  | IRL | 04.10.1997 | |
| Eric O'Dell | M |  | CAN | 21.06.1990 | |
| Brian O'Neill | M | | USA | 01.06.1988 | |
| Taylah O'Neill | F |  | AUS | 11.11.1994 | |
| Elvira Öberg | F |  | SWE | 26.02.1999 | |
| Hanna Öberg | F | | SWE | 02.11.1995 | |
| Nadya Ochner | F |  | ITA | 14.03.1993 | |
| Takuro Oda | M |  | JPN | 13.07.1992 | |
| Marco Odermatt | M |  | SUI | 08.10.1997 | |
| Meryeta Odine | F | | CAN | 24.02.1997 | |
| Gabriel Odor | M |  | AUT | ||
| Ornella Oettl Reyes | F |  | PER | 14.12.1991 | |
| Katrin Ofner | F | | AUT | 05.03.1990 | |
| Jens Lurås Oftebro | M |  | NOR | 21.07.2000 | |
| Ben Ogden | M | | USA | 13.02.2000 | |
| Dominique Ohaco | F |  | CHI | 19.12.1995 | |
| Atte Ohtamaa | M |  | FIN | 06.11.1987 | |
| Niko Ojamäki | M | | FIN | 17.06.1995 | |
| Oleksandr Okipniuk | M |  | UKR | 04.09.1998 | |
| Julie Oksbjerg | F |  | DEN | 02.12.2000 | |
| Megan Oldham | F | | CAN | 12.05.2001 | |
| Viktoriya Olekh | F | | UKR | 02.10.1993 | |
| Juho Olkinuora | M | | FIN | 04.11.1990 | |
| Frederik Olofsson | M | | SWE | 27.05.1996 | |
| Marte Olsbu Røiseland | F | | NOR | 07.12.1990 | |
| Igor Omelin | M |  | RUS | 30.08.1995 | |
| Miyabi Onitsuka | F | | JPN | 12.10.1998 | |
| Mitsuki Ono | F | | JPN | ||
| Silje Opseth | F | | NOR | 28.04.1999 | |
| Zdenek Orct | M |  | CZE | 28.04.1970 | |
| Ksenia Orlova | F | | RUS | ||
| Katie Ormerod | F |  | GBR | 25.08.1997 | |
| Chiho Osawa | F | | JPN | 10.02.1992 | |
| Matthieu Osch | M |  | LUX | 01.04.1999 | |
| Misaki Oshigiri | F | | JPN | 29.09.1992 | |
| Chika Otaki | F | | JPN | 14.12.1998 | |
| Takeru Otsuka | M | | JPN | 02.04.2001 | |
| H.Otterspeer | M |  | NED | 11.11.1988 | |
| Manon Ouaiss | F |  | LIB | 19.09.2000 | |
| Yongli Ouban | M | | CAN | 15.04.2000 | |
| Kai Owens | F | | USA | 16.08.2004 | |
| Kosuke Ozaki | M | | JPN | 07.10.1992 |