| O'Brochta,
Allyson - Redmond, WA |
| Ochoa,
Jonathan - Moses Lake, WA |
| O'Connor,
Allison - Diamond Bar, CA |
| O'Connor,
Alyssa - Hamilton, MT |
| Oddo,
Gabrielle - Alta Loma, CA |
| Odegard,
Tatum - Mercer Island, WA |
| O'Dell,
Dalen - Laguna Beach, CA |
| Officer,
Bradley - Shoreline, WA |
| Okada,
Karen - Bellevue, WA |
| Okeson,
Makenna - Anchorage, AK |
| Okuna,
Erin - Pearl City, HI |
| Olafsdottir,
Lilja - Ona, WV |
| O'leary,
Matthew - Olympia, WA |
| Olmedo,
Alexandra - Kingston, WA |
| Olson,
Anna - Everson, WA |
| Olson,
Jacob - Glendora, CA |
| Omann,
Isabella - Milford, KS |
| Onishchenko,
Miroslava - Kent, WA |
| Ontiveros,
Rebekah - San Jose, CA |
| Orre,
Ashley - Pleasant Hill, OR |
| Otto,
Chloe - Granite Falls, WA |
| Ou,
Yu-Hui - Kaohsiung City, TAIWA |
| Owen,
Sarah - Shoreline, WA |