- O'Brien, Abigail
- O'Donoghue, Enda
- Oberhauser, Ursula
- Odenbach, Marcel
- Oertig, Willy
- Ogaki, Mihoko
- Ohringer, Frederic
- Olanier, Cyril
- Olbrich, Renate
- Olbrich, Jürgen O.
- Oldenburg, Claes Thure
- Oleinikov, Igor
- Oleinikov, Igor
- Onodera, Yuki
- Opalka, Roman
- Opedal, Lage
- Opheys, Susanne
- Opie, Julian
- Oppenheim, Dennis
- Oppenheim, Meret
- Oppenhoff, Vanessa
- Oppermann, Anna
- Oppler, Ernst
- Oran, Ahmet
- Orimoto, Tatsumi
- Orlik, Emil
- Oros, Mariana
- Ortega, Antonio
- Ortiz, Juliana
- Oschatz, Julia
- Oshima, Naruki
- Ostendorf, Rainer
- Osterlind, Allan
- Osterloh, Dierk
- Ostermeyer, Judith
- Oswald Oberhuber,
- Otte, Hanns
- Otten, Dieter
- Otterbach, Axel F.
- Otto, Justine
- Otto, Waldemar
- Overbeck, Friedrich
- Owusu - Ankomah,
- Ozenfant, Amédée