- Oskorri -- Osny Silva
- OSO -- Ostkreutz
- Ostkurve -- Oswald
- Oswald 5-0 -- OTB
- OTB -- Otherbrother Daryl
- Otherfucka -- Otis Redding
- Otis Redding & Carla Thomas -- Otraslab
- Otro Nivel -- Otto Harbach
- Otto Hardwicke -- Ottomix
- Ottonero -- Ouly Zoo
- Oum -- Our Love Will Destroy the World
- Our Lunar Activites -- Out of Focus
- Out of Frame -- Out of Luck