| 1126 | | Orange Monkey | |
| 1127 | | Orange Mothers | |
| 1128 | | Orange Range | |
| 1129 | | Orange Sky | Reggae |
| 1130 | | Oranssi Paska | |
| 1131 | | Oratorio | Metal |
| 1132 | | Oratorio The World God Only Knows | |
| 1133 | | Oratory | Metal |
| 1134 | | Orb, The | |
| 1135 | | Orba Squara | Acoustic/Folk/Indie |
| 1136 | | Orbison Roy | |
| 1137 | | Orbit | Indie/Rock |
| 1138 | | Orbital | Ambient/Electronic |
| 1139 | | Orchestra Bagutti | |
| 1140 | | Orchestra Super Mazembe | |
| 1141 | | Orchestral Manoeuvres In The Dark | 80s/Electronic |
| 1142 | | Orchestral Manoeuvres In The Dark (O.M.D.) | 80s/Pop/Rock |
| 1143 | | Orchid | Emo/Hardcore |
| 1144 | | Orchis | |
| 1145 | | Orcivus | |
| 1146 | | Ordain | |
| 1147 | | Ordalium | |
| 1148 | | Orden Ogan | Metal |
| 1149 | | Order 204 | |
| 1150 | | Order From Chaos | |
70s/80s/Country/Pop
Electronic/Hardcore
Rock
Emo/Hardcore