| Oscar Levant |
| Oscar Lopez |
| Oscar Mack |
| Oscar Martinez |
| Oscar Moore |
| Oscar Moore Quartet |
| Oscar Neves |
| Oscar Paterson Trio |
| Oscar Peterson |
| Oscar Peterson & the Very Tall Band |
| Oscar Peterson Four |
| Oscar Peterson Quartet |
| Oscar Peterson Trio |
| Oscar Pettiford |
| Oscar Prince |
| Oscar Rabin |
| Oscar Rabin & His Band |
| Oscar Rivera |
| 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 |
| Osmo's Cosmos |
| Osmosphere |
| Osser, Glen & His Orchestra |
| Osser, Glenn And His Orchestra |
| Osser, Glenn Orchestra |
| Ossie Scott |
| Ossler |
| Ossner, Glenn & His Orchstra |
| Osso |
| Ost |
| Ost & Kjex |
| Ost+Front |
| Osta Love |
| Oster, Martien |
| Osunlade |
| Osvaldo Borgez |
| Osvaldo Montes |
| Oswaldo Montenegro |
| 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 |
