- O'Brian, Patrick
- O'Brien, Conor Cruise
- O'Brien, Darcy
- O'Brien, Edna
- O'Brien, Geoffrey
- O'Brien, Justin
- O'Brien, Sean
- O'Brien, Tim
- O'Connell, Arturo
- O'Connor, Francis V.
- O'Connor, Frank
- O'Connor, Sandra
- O'Donnell, Everard
- O'Donnell, Patrick
- O'Dwyer, Paul
- O'Farrell, Brigid
- O'Flaherty, James C.
- O'Gorman, Ned
- O'Hagan, Andrew
- O'Hanlon, John
- O'Nan, Stewart
- O'Neil, Wayne
- O'Neill, Hope Franklin
- O'Neill, Onora
- O'Neill, Wayne
- O'Rourke, Beth
- O'Rourke, Meghan
- O'Sullivan, John
- O'Toole, Fintan
- O'Toole, George
- O'Toole, Patricia
- Oakes, Edward T.
- Oakes, James
- Oakford, David
- Oakley, Robert
- Oates, Joyce Carol
- Oates, Stephen B.
- Obasanjo, General Olusegun
- Ober, John David
- Ober, William B.
- Ober Jr., Robert F.
- Oberhaus, Dorothy Huff
- Oberlander, Jonathan
- Ochab, Maryna
- Odajnyk, Walter
- Odegard, Peter H.
- Odenwald, Ward F.
- Odojewski, Wlodzimierz
- Oe, Kenzaburo
- Offer, Avner
- Offitt, Sidney
- Ofstad, Harald
- Ogburn, Charlton
- Ohashi, Ken
- Ohmann, Richard
- Oke, Philip
- Okpaku, Joseph
- Okri, Ben
- Olbrychski, Daniel
- Oldham, John
- Olds, David D.
- Olds, Marshall
- Olds, Sharon
- Oliphant, Robert
- Oliver, Roland
- Olivieri, Antonio
- Ollard, Richard
- Ollman, Bertell
- Olmert, Ehud
- Olmsted, D.L.
- Olsen, Inger M.
- Olsen, Tillie
- Olson, Lawrence
- Olson, Robert L.
- Omaar, Rakiya
- Ondaatje, Michael
- Onyszkiewicz, Janusz
- Opalski, Magdalena
- Ophuls, Marcel
- Opiela, Stanislaw
- Oppenheim, Felix
- Oppenheimer, Gerald J.
- Oppenheimer, Joel
- Oppenheimer, Martin
- Oppenheimer, Robert
- Orbach, Susie
- Oren, Michael
- Orgel, Shelley
- Orlov, Yuri
- Orr, Akiva
- Orr, Carol Wallace
- Orr, H. Allen
- Orwell, George
- Orwin, Clifford
- Orzack, Steven
- Osborne, John
- Osborne, Nigel
- Oshins, Eddie
- Osipova, Tatiana
- Osmanczyk, Edmund Jan
- Ossana, Diana
- Osser, Bernard
- Ostow, Mortimer
- Ostriker, Alicia
- Ostroff, Anthony
- Ostrovsky, Eugene
- Ostwald, Martin
- Otero, Carlos
- Otten, Erna
- Ottenweller, Mark
- Ottomano, Matthew
- Ouidah, Baker
- Ouron, D.L.
- Outlaw, Lucius
- Overseas Press Club of America
- Ovid
- Owen, Ursula
- Oxaal, Ivar
- Oxenhandler, Neal
- Oz, Amos
- Ozick, Cynthia