Bands Sort By: O
| O Che Genre: | O Emperor Genre: Irish Artists | O.A.R Genre: Classic Rock |
| Oasis Genre: Indie | Obituary Genre: Death Metal | Oceano Genre: Black Metal |
| Oceansize Genre: | Mairtin OConnor Genre: Irish Artists | October File Genre: |
| Oddsocks Revival Genre: Irish Artists | Of Montreal Genre: Electronic | Off With Their Heads Genre: Modern Punk |
| The Offspring Genre: Pop Punk | Liam O'Flynn Genre: Irish Artists | Dustin OHalloran Genre: |
| OKGO Genre: | Ol Dirty Bastard Genre: Hip Hop | Old Firm Casuals Genre: Punk |
| Old Mans Child Genre: | Ondskapt Genre: Black Metal | One Day As A Lion Genre: Hip Hop |
| One Line Drawing Genre: Indie | One Man Army Genre: | Onslaught Genre: |
| Operahouse Genre: | Operation Ivy Genre: Ska | Operator Please Genre: |
| Opeth Genre: Death Metal | Orange County Choppers Genre: Brands | Orange Goblin Genre: Metal |
| The Orb Genre: Ambient | Order Of Ennead Genre: Black Metal | Origin Genre: Hard Rock |
| The Orion Experience Genre: | Declan ORourke Genre: Irish Artists | Ortzroka Genre: |
| Osaka Popstar Genre: | Ozzy Osbourne Genre: Classic Metal | Otep Genre: |
| Outbreak Genre: | Outkast Genre: R&B/Rap/Hip Hop/Urban | Overkill Genre: |
| Owl City Genre: Electronic | Ozric Tentacles Genre: |  |
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