| One Way Band |
| One Way Letter |
| One Way Mirror |
| One Way Out |
| One Way Ride |
| One Way System |
| One Way Terror |
| One Week Notice |
| One Wing |
| One Wish (Arista #07822 19022) |
| One Wolf |
| One World Orchestra |
| One3D |
| One8tea |
| Oneacis |
| OneDown |
| OneDrop Fellas |
| Oneekathediva |
| ONEFOUR |
| OneHeadApart |
| Oneida |
| Oneide Bastos |
| Oneinthe4rest |
| Oneiroid Psychosis |
| Onekuper |
| OneLineDrawing |
| Onell Diaz |
| Onelz |
| Oneman |
| ONEMANSHOW Foundation |
| Oneness |
| Oneohtrix Point Never |
| Oneonta |
| Onephatdeeva |
| Onephatfeeva |
| Onepity |
| OneRepublic |
| OneRoots |
| Ones & Zeros |
| Onesidezero |
| ONESIME GROSBOIS |
| Onesimus |
| Onesimus Muzik |
| Onesto Jennifer |
| Onetwothreescream |
| Oneuponedown |
| Oneway System |
| Onge Ash Ketchum & Unge Mars |
| Ongehoord |
| Onguito Wa |
| Oni |
| Oni One |
| Oni Rising |
| Onichiwa |
| Onie Wheeler |
| Oniel Anubis |
| ONINO |
| Onion Balls |
| Onirama |
| Oniria |
| ONIX |
| Onk Lou |
| Onkar Minhas |
| Onkar Singh |
| Onkar Tarkase |
| Onkel Reje |
| Onkel Tom |
| Onkel Tuka |
| Onklp |
| Onlife |
| Only |
| Only Boys Aloud |
| Only C |
| Only Chrome-Waterfall Orchestra |
| Only Crew |
| Only Crime |
| Only Kids Aloud |
| Only Living Witness |
| Only Men Aloud |
| Only Objects |
| Only on the Inside |
| Only Seven Left |
| Only Sibling |
| Only Son |
| Only The Family |
| Only The Young |
| Only Vale Kids Aloud |
| Only Yours |
| OnlyC |
| Onlydesi |
| Onni |
| Onnie |
| Onnik Dinkjian |
| Onno Tunc |
| Ono |
| Onofree |
| Onophris |
| Onos |
| ONR |
| Onsinfrec |
