| Olding, Grant (1) | Oler, Kim (1) | Olivares, Iván (1) |
| Olive, John (1) | Oliver, Ryan Scott (5) | Olney, Dorothy (0) |
| Olsen, Mark V. (1) | Olson, Phil (9) | Olson, Paul (3) |
| Omorotionmwan, Philana (1) | Onetti, Antonio (1) | Opelka, Gregg (10) |
| Oppenheimer, George (1) | Organ, Scott (2) | Orlando, Dominic (1) |
| Orlock, John (1) | Orloff, Rich (5) | Ormerod, John (1) |
| Ormerod, Joan (1) | Ormerod, Nick (1) | Orr, Megan (4) |
| Ortega, Rodolfo (1) | Orton, Joe (4) | Ortwein, Terrence (3) |
| Orwell, George (5) | Osborne, Hugh (1) | Osborne, Jimmy (2) |
| Osborne, J. Dietz (1) | Osborne, John (3) | Osborne, Ron (3) |
| Osterman, Marilyn (1) | Overmyer, Emily (1) | Overton, David (1) |
| Overton, Shawn (1) | Owen, Luke (1) | Owen, Bill (1) |
| Owen, Siân (1) | Owen, Carmel (1) | Owens, Rosemary (1) |
| Owens, Robert (1) | Owsiak, Tiffany (1) | Owusu, Kwame (1) |