- O'Brien, Janet
- O'Dell, Sijy
- O'Donnell, Michael
- O'Laughlin, Brian
- O'Neal Felix, Racquel
- O'Shea, John J.
- O'Sullivan, Kathleen
- Oaster, Kimberly
- Obasi, Okwuchi
- Ochocinska, Malgorzata
- Officer, Jacqueline
- Ogando, Orlando
- Oh, April
- Ohayon, Joan
- Ohene, Beverly
- Ojumu, Akinlolu
- Olander, Alyson
- Olariu, Ana
- Olia, Adam
- Oluyemi, Titilayo
- Omar, Nasser
- Oormazdi, Armin
- Ordonez, Anna
- Oresanya, Jejelola
- Orezzoli, Betina
- Osgood, Sharon
- Oshegbo, Gloria
- Osinski, Elizabeth
- Osorio, Edwin
- Otterson, Bradley
- Ottinger, Elizabeth
- Owens, Roland
- Owens-Scarboro, Annette
- Owoade, Olumide
- Owotoki, Lisa