| OSK |
| Oskar Green |
| Oskar Gritten |
| Oskar Häggström |
| Oskar Lindwall |
| Oskar Linnros |
| Oskar Nordbø |
| Oskar Oiestad |
| Oskar Stabno |
| Oskar Westerlin |
| Oskay Nejat |
| Osker |
| OSKIDO |
| Osland Jazz Orchestra |
| Oslo Circles |
| Oslo Ess |
| Oslo Gospel Choir |
| Oslo Parks |
| Osman |
| Osman Bozkurt |
| Osman Broody y La Banda Encendida |
| Osman Çetin |
| Osman Değirmenci |
| Osman Güler |
| Osman Öztunç |
| Osman Tuğsal |
| Osmani Garcia |
| Osmanov |
| OsmanStarkov |
| Osmar Milito |
| Osmar Pérez |
| Osmo's Cosmos |
| Osmosphere |
| Osmoz |
| Osni Ribeiro |
| Oso Krazy |
| Oso Oso |
| OSPETA 19/20 |
| Osquel |
| Osqui |
| Osser, Glen & His Orchestra |
| Osser, Glenn Orchestra |
| Ossian ZGZ |
| Ossie Scott |
| Ossler |
| Osso |
| Ost Boys |
| Ost+Front |
| Ost & Kjex |
| Osta Love |
| Ostatni w Raju |
| Ostberlin Androgyn |
| Ostblockschlampen |
| Oster Lapwass |
| Ostetrika Gamberini |
| OSTROVA |
| Ostry |
| Ostry Bezimienni |
| Osunlade |
| Osvaldo Borgez |
| Osvaldo Di Dio |
| Osvaldo Fresedo |
| Osvaldo Montes |
| Osvaldo Pugliese |
| Osvaldo Supino |
| Osvaldyn |
| OSVISS |
| Oswald |
| Oswaldo Montenegro |
| Oswin Benjamin |
| Osymyso |
| Osyron |
| Oszibarack |
| OT |
| Otalay |
| Otari |
| Otavio Augusto & Gabriel |
| Otávio de Sousa |
| Otega |
| Oteil Burbridge |
| Otep |
| OTF Ikey |
| Otha T. Carpenter |
| OthaSoul |
| Othello |
| Othello Anderson |
| Othello Molineaux |
| OThePlug |
| Other Lives |
| Other Me |
| Other Men |
| Other Side |
| Other Star People |
| Other Two |
| Other Wood |
| Otherkin |
| Others |
| Otherwise |
| Othman Hamzah |
| Othniel |
