- O'Connell, Hayden1
- O'Neil, Kara1
- O'Neill, Nathan1
- O'Reilly, Grace1
- O'connor, Shannon R.1
- Obermaier, James1
- Obert, Sean1
- Olaya, Grace B.1
- Oleynick, Robert1
- Oliveira, Michael1
- Ollari, Samuel1
- Oppong, Susanna1
- Osei, Michael1
- Osgood, Adam1
- Ost, Larson H.1
- Ott, Samuel1
- Owen, Morgan1
- Owusu, Evans1
- Oxford, Heather1