| Oingo Boingo |
| OJ da Juiceman |
| OJ Mariano |
| Ojete Calor |
| Ok Go |
| OK KID |
| OKAMOTO'S |
| Okapi Guitars |
| Okasian |
| Okefenokee Orchestra |
| Okid |
| Okieriete Onaodowan |
| Okí© |
| Okke Punt |
| Okkervil River |
| Okko |
| Oksana |
| Okta Logue |
| Oktay Özdemir |
| Ol Skool |
| Ol' 55 |
| Ol' dirty bastard |
| Ol' Dirty Bastard AKA Dirt McGirt |
| Ol'Kainry |
| Ola |
| Ola Åkerman |
| Ola Kvernberg |
| Ola Salo |
| Ola Svensson |
| Olaf Berger |
| Olaf Blackwood |
| Olaf Casimir |
| Olaf Henning |
| Olaf Kübler |
| Olamide |
| OLAN |
| Olav Basoski |
| Olav Mol |
| Olavi Virta |
| Old & In the Gray |
| Old & In the Way |
| Old 97's |
| Old 97’s |
| Old and New Dreams |
| Old Blind Dogs |
| Old Chicago Blues Band |
| Old Crow Medicine Show |
| Old Dead Tree |
| Old Dominion |
| Old Fashioned Revival Hour Choir |
| Old Friends Quartet |
| Old Jawbone |
| Old Man Of Name |
| Old Man's Child |
| Old News |
| Old School Freddy B |
| Old School Freight Train |
| Old School Players |
| Old Town Mafia |
| Old World Disorder |
| Oldelaf |
| Oldfield Mike |
| Oldie Börse |
| Ole |
| Ole "Fessor" Lindgreen |
| Ole Hansen |
| Ole Kock Hansen |
| Olé Olé |
| Ole Paus |
| Ole Stolle |
| Ole-E |
| Ole-ole the world kita juara |
| Oleander |
| Oleg Frish |
| Oleg Lundstrem |
| Oleg Lundstrem Orchestra |
| Olene Kadar |
| Olesya Rulin |
| Oleta Adams |
| Oletha Carter |
