O.K., Kiki
Oates, Joyce Carol
Oberteuffer, Karl
O'Campo, Isidoro
Oertel, Johannes
Offengeld, I.
John, Ogborn
O'Hara, Eliot
O'Hara, Frank
O'Higgins, Pablo
Ohr, George
Okada, Kenzo
O'Keeffe, Georgia
Oldenburg, Claes
Olitski, Jules
Olson, Toby
Ono, Yoko
Oorthuys, Cas
Opie, John
Oppenheim, Dennis
Oppenheim, Meret
Oppenheimer, Joel
O'Reilly, Elizabeth
Orozco, Jose
Orozco, Luis
Orrefors
Ortega, Jose
Osk, Roselle S.
Osorio, Pepón
Ostade, Adriaen van
Ott, Jane Llewellyn
Owen, Frederick