| The Notre Dames |
| The Notselves |
| The Notting Hillbillies |
| The Notwist |
| The Nova Jazz Orchestra |
| The Novelles |
| THE NOVEMBERS |
| The Now |
| The Now Generation |
| The Now People |
| The Nu-Sounds |
| The Nuclear Whales Saxophone Orchestra |
| The Nudes |
| The Numb Ones |
| The Number Twelve Looks Like You |
| The Nutmegs |
| The Nuttree Quartet |
| The Nycer |
| The Nylons |
| The Nymphs |
| The O |
| The O'Jays |
| The O'Kanes |
| The O'Kaysions |
| The O'My's |
| The O'Neill Brothers |
| The O.C. |
| The O.C. Supertones |
| The Oak Ridge Boys |
| The Ocean |
| The Ocean Band |
| The Ocean Blue |
| The Octavarium Orchestra |
| The Octet |
| THE OCTOPUS |
| The Odd Couple |
| The Oddictions |
| The Oddictions and Britt Daley |
| The Odds |
| The Oedipus Complex |
| The Official Receivers |
| The Offspring |
| The Ogd Trio |
| The Oh Hellos |
| The Oinker Sisters |
| The Okee Dokee Brothers |
| The Old Dead Tree |
| The Olivia Project |
| The Olivia Tremor Control |
| The Olliephonic Horns |
| The Olympians |
| The Olympics |
| The Omen |
| The OMG Girlz |
| The Ominous Seapods |
| The On the Line All-Stars |
| The One |
| The One AM Radio |
| The One Hundred |
| The One World Ensemble |
| The Ones |
| The only children |
| The Only Ones |
| The Operation M.D. |
| The Opposites |
| The Options |
| The Opus |
| The Orange Lights |
| The Orangu-Tones |
| The Orb |
| The Orchestra |
| The Orchids |
| The Ordinaires |
| The Ordinary Boys |
| The Organ |
| The Orgels |
| The Orginal Moonmaids Plus One |
| The Original |
| The Original Blind Boys of Mississippi |
| The Original Brothers |
