- O'Hara, Rachel1
- O'Leary, John1
- O'Malley, Colleen1
- O'Neil, Timothy1
- O'Reilly, Catch1
- Ocasio, Mason1
- Ohlson, Carolynn1
- Olson, Caleb1
- Opalka, Suzy1
- Oppong, Susanna1
- Osborn, Scott1
- Oswald, Michael1
- Ott, Molly1
- Ouelette, Megan1
- Ouellette, Christina1
- Owen, Brianna1