- O'Brien, Michael John1
- O'Keefe, Aidan J1
- O'Keefe, Brian M1
- O'Leary, Jason E.1
- O'Shea, Erin Elizabeth1
- Olivieri, Steven J1
- Oprica, Marie Denise1
- Ordonez Pereira, Juan Daniel1
- Orso, Dericc Andrew1
- Osmer, William Davis.1
- Otis Mattiuzzi, Benjamin Milton1
- Otuyelu, Adeola Oluwakemi1
- Ouellette, Christina Elizabeth1