| Oceans Turn Red |
| Oceanship |
| Oceansize |
| Oceanwatters |
| Ocer y Rade |
| Ocevne |
| Ochentay7 |
| OchiTommy |
| Ochman |
| Ocho |
| Ocho Drippin |
| Ocho Fabuloso |
| Ochungulo Family |
| Ockley |
| OCnotes |
| Ocoenia |
| OConnor |
| Ocre |
| OCS |
| OCTAABER |
| Octahvia |
| Octane |
| Octav Ponto |
| Octave Lissner |
| Octave Minds |
| Octave Noire |
| Octave One |
| Octave One |
| Octavia |
| Octavia Harp Ensemble |
| Octavia KAY |
| Octavia Sperati |
| Octavian |
| Octavianus Audy Ponto |
| Octavio Bugni featuring Sabina Witt |
| Octavius Blythe |
| Octheproducer |
| October |
| October 31 |
| October Burns Black |
| October Drift |
| October Evans |
| October Fall |
| October Flight |
| October Jonez |
| October London |
| October Project |
| October Tide |
| Octobop |
| Octopus |
| Octubre Doce |
| Octubre XX |
| Octurn |
| Ocyris |
| Od |
| OD Tapo Imi |
| ODA |
| Oda Loves You |
| ODAE |
| Odair José |
| Odalys |
| Odarama Dreams |
| Odario |
| Odawg |
| ODB |
| Odball |
| ODBLU |
| ODC |
| Odd Antonsen |
| Odd Antonsen Big Band |
| Odd Couple |
| Odd Crew |
| Odd Future |
| Odd Girl Out |
| Odd Holiday |
| Odd Is He |
| Odd Lottery |
| Odd Nordheim |
| Odd Nordstoga |
| Odd Nosdam |
| Odd Numbers |
| Odd Palace |
| Odd Palmer |
| Odd Persons |
| Odd Project |
| Odd Spångberg |
| Odd Squad |
| Odd Squad Family |
| Odd Tree |
| Oddbot |
| OddFelix |
| Oddie Agam |
| Oddisee |
| Oddity |
| Oddjob |
| Oddkidout |
| Oddland |
| Oddleif Stensland |
| ODDLIQUOR |
| Oddnote |
