| Oscar Salguero |
| Oscar Terraf |
| Oscar The Grouch |
| Oscar Ticas |
| Oscar Toney, Jr. |
| Oscar Wolfe |
| Oscarcito |
| Oschino |
| Oschino & Sparks |
| Osdorp Posse |
| OSE |
| Ose |
| Oséas Silva |
| Oshri |
| Oshy |
| Osi Lewin |
| Osian Ellis |
| Osibisa |
| Osie Johnson |
| Oskar Linnros |
| Oskar Sala |
| Osker |
| Osland Jazz Orchestra |
| Oslo Gospel Choir |
| Osman |
| Osmani Garcia |
| Osmar Milito |
| Osmar Pérez |
| Osmo's Cosmos |
| Osmosphere |
| Osser, Glen & His Orchestra |
| Osser, Glenn Orchestra |
| Ossian |
| Ossie Scott |
| Ossler |
| Osso |
| Ost & Kjex |
| Ost+Front |
| Osta Love |
| Oster, Martien |
| Osunlade |
| Osvaldo Borgez |
| Osvaldo Montes |
| Osvaldo Pugliese |
| Oswaldo Montenegro |
| Osymyso |
| OT |
| Otavio Augusto & Gabriel |
| Otávio de Sousa |
| Oteil Burbridge |
| Otep |
| Otha T. Carpenter |
| Othello |
| Othello Anderson |
| Othello Molineaux |
| Other Lives |
| Other Side |
| Other Star People |
| Other Two |
| Otherkin |
| Others |
| Otherwise |
| Othorized Fam |
| Othrs |
| Otie |
| Otieno Terry |
| Otis |
| Otis & Carla |
| Otis & Shugg |
| Otis and Carla Band |
| Otis Blackwell |
| Otis Clay |
| Otis Day |
| Otis Day & the Knights |
| Otis Grand |
| Otis Parker |
| Otis Patterson |
| Otis Redding |
| Otis Redding & Carla Thomas |
| Otis Rush |
