O
- Albert Oehlen (born 1954), painter
- Markus Oehlen (born 1956), painter
- Chris Ofili (born 1968), painter
- Jules Olitski (1922–2007), painter
- Arthur Omar (born 1948), photographer, filmmaker, video and installation artist,
- Yoko Ono (born 1933), musician, artist
- Orlan (born 1947)
- Roman Opałka (b. 1931, d. 2011), painter
- Julian Opie (born 1958), digital artist
Read more about this topic: List Of Contemporary Artists