O   | O | O Fracas |
| O Level | O Rodney & Cooley Joe | O Suilleabhain, Micheal |
| O Toole, Peter | O Yuki Conjugate | O'Banion, John |
| O'Brien, Conan | O'Brien, Deke | O'Brien, Dermot |
| O'Brien, Erin | O'Brien, Hod | O'Brien, Michael |
| O'Brien, Tim | O'Brien-Docker, Ian | O'Brien-Docker, John |
| O'Bryan | O'Bryant's Washboard Wonders | O'Casey, R. |
| O'Casey, Sean | O'Connell, Helen | O'Connell, Maura |
| O'Connor, Cavan | O'Connor, Des | O'Connor, Hazel |
| O'Connor, Kathie | O'Connor, Sinead | O'Connor, Tom |
| O'Cuthbert, Martin | O'Day, Alan | O'Day, Anita |
| O'Donnell Roger | O'Donnell, Al | O'Donnell, Alison |
| O'Donnell, Daniel | O'Donnell, Eugene | O'Donnell, Joe |
| O'Donnell, Rosie | O'Dowd, Barry | O'Dowda, Brendan |
| O'Duffy, Michael | O'Farrill, Chico | O'Flynn, Liam |
| O'Gwynn, James | O'Hagan, Sean | O'Halloran Brothers, The |
| O'Hara, John | O'Hara, Mary | O'Hara, Mary Margaret |
| O'Hara, Maureen | O'Hearn Patrick | O'Jays, The |
| O'Kane, John | O'Kanes, The | O'Kaysions, The |
| O'Keefe, Danny | O'Keefe, Peggy | O'Leary, Johnny |
| O'List, David | O'Malley, Stephen | O'Meara, Jo |
| O'Neal, Alexander | O'Neal, Johnny | O'Neal, Shaquille |
| O'Neil, Sandy | O'Riordan, Dolores | O'Rouke, Jim |
| O'Rourke, Declan | O'Rourke, Jim | O'Sullivan, Bernard |
| O'Sullivan, Daniel | O'Sullivan, Gilbert | O, Karen |
| O, Rob | O-Town | O. |
| O. J. Abbott | O. P. Nayyar | O.A.R (Of A Revolution) |
| O.C Roberts | O.C. | O.Children |
| O.D, Adrenalin | O.G.C. | O.M.D. |
| O.T. Quartet | O.T.T | Oak |
| Oak Ridge Boys, The | Oakenfull, Ski | Oakenshield |
| Oakey & Moroder | Oakley, Gee | Oaktown's 3-5-7 |
| Oasis (Dutch) | Oasis (Mary Hopkin) | Oasis (UK) |
| Oasis (US) | Oates John | Oates, Jackie |
| Oath, The | Oathbreaker | Oats, Wild |
| Oattes Van Schaik | Obassey, Patty | Obel, Agnes |
| Obelisk | Oberhofer | Oberlin, Russell |
| Obernik, Sam | Oberon | Oberst, Conor |
| Obey The Brave | Obey, Ebenezer | OBF |
| Obi | Obi, Ras | Obie Trice |
| Obituary | Objayda | Obliveon |
| Obraztsova, Elena | Obsession | Obus |
| Ocasek, Ric | Occasion, The | Occasional Few, The |
| Occasional Five, The | Occasional Project, The | Occasionally David |
| Occult Burial | Ocean | Ocean (Modern Soul) |
| Ocean Colour Scene | Ocean Grove | Ocean Party, The |
| Ocean, Billy | Ocean, Humphrey | Oceanic |
| Oceano | Oceans Ate Alaska | Oceans Of Slumber |
| Oceansize | Ochil Players, The | Ochs, Phil |
| Ockeghem, Johannes | Octa, Octo | Octagon Man, The |
| Octave One | Octavia | Octavian |
| October Country | October Tide | October, Gene |
| Octopus | Octopus Syng | Oculus |
| Odd Man Out | Oddie, Bill | Odds & Ends |
| Odell, Tom | Odetta | Odin |
| Odnoposoff, Ricardo | Odrich, Ron | Odyssey |
| Odyssey | Odyssey, The | Of Arrowe Hill |
| Of Feather And Bone | Of Mice & Men | Of Monsters And Men |
| Of Montreal | Ofarim, Esther | Ofege |
| Off | Off The Wall | Off With Their Heads |
| OFF! | Off-Shore | Offenbach (Rock) |
| Offenbach, Jacques | Offhooks, The | Official Secrets, The |
| Offshore | Offspring | Ofshore |
| Ofwerman, Rune | Ogan, Gary & Lamb, Bill | Ogdens, The |
| Ogdon, John | Ogdon, John & Lucas, Brenda | Ogerman, Claus |
| Ogermann, Claus | Oggum | Ogunde, Hubert |
| Ogura, Kei | Oh No | Oh No Ono |
| Oh Ok | Oh Well | Oh Wonder |
| Oh! Polo | Oh' Dev | Oh, Atoms |
| Oh, Nadia | ohGr | OHGR WELT |
| Ohhms | Ohi Ho Bang Bang | Ohio Express |
| Ohio Players | Ohlsson, Garrick | OHM |
| Ohno, Shunzo | Ohno, Yuji | Ohnuki, Taeko |
| Oi Polloi | Oil Seed Rape | Oingo Boingo |
| OISIN | Oïstrakh & Rostropovitch | Oïstrakh, David |
| Oïstrakh, David & Igor | Oïstrakh, Igor | Oizone |
| Ojo, Dele | OK Go | OK Jive |
| Okay Temiz | Okereke, Kele | Okino, Shuya |
| Okino, Yoshihiro | Okkervil River | Okkultokrati |
| Okosun, Sonny | Okumoto, Ryo | Ol Dirty Bastard |
| Oladimeji & His Talking Drum | Olatunji, Babatunde | Olausson, Jakob |
| Olavide, Begoña | Olay, Ruth | OLD |
| Old And In The Way | Old Crow Medicine Show | Old Fashioned Love |
| Old Gold | Old Man Gloom | Old Man River |
| Old Metropolitan Band | Old Mole Band, The | Old Pete & John Christie |
| Old Skool Orchestra | Old Skull | Old Swan Band, The |
| Oldfield, Harry | Oldfield, Mike | Oldfield, Natasha |
| Oldfield, Sally | Oldfield, Terry | Oldham Tinkers, The |
| Oldham, Andrew Loog | Oldham, Will | Oldland Montano |
| Oldland, Misty | Ole Ole | Oleander |
| Olenn, Johnny | Olevsky, Julian | Oli Max & D.J. Shapps |
| Oli.P | Olive | Olive Juice |
| Olive, Brian | Olivelawn | Oliver |
| Oliver Books calendars | Oliver Dawson Saxon | Oliver Naylor's Seven Aces |
| Oliver, David | Oliver, Frankie | Oliver, Graham |
| Oliver, King | Oliver, Mickey | Oliver, Sy |
| Oliveri, Nick | Olivia De Havilland | Olivia Tremor Control, The |
| Olivier, Laurence | Olivor, Jane | Ollie & Jerry |
| Olney, Dave | Olney, David | OLO Worms |
| Olsen, Angel | Olsen, George | Olsher, Lesley |
| Olson, Mark | Olsson, Kai | Olsson, Mats And His Orchestra |
| Olympia Dukakis | Olympic Bouzouki Group, The | Olympic Lifts |
| Olympic Runners | Olympic World | Olympics, The |
| Om | Omar | Omar And The Howlers |
| Omarion | Omartian, Michael | Omartian, Michael And Stormie |
| OMC | Omega | Omega Amoeba |
| Omega Tribe | Omegavortex | Omen |
| Omen III | Omerta | Omi, Sonik |
| Omit | Omni | Omni Trio |
| Omnium Gatherum | Omori, Hinako | Omowura, Ayinla |
| Omsk Russian Ensemble, The | Omura, Kenji | On 1 Crew |
| On And Ons, The | On Offs, The | On Parole |
| On The Air | On The One | On The Seventh Day |
| On The Speakers | On Trial | On/Off |
| Once & Future Band | Once Again | Once Blue |
| Once Human | Onda Del Futuro | One |
| One 2 Many | One Blood | One Day As A Lion |
| One Dove | One God Universe | One Hand One Heart |
| One Hundred Ton And A Feather | One Hundred Words For Snow | One II One |
| One In A Million | One Lady Owner | One Minute Silence |
| One More Time | One Nation | One Night Only |
| One O'Clock Gang | One The Juggler | One Thousand Violins |
| One Three, The | One To One | One Trive |
| One True Voice | One Way System | One Way Ticket |
| One Word | One, Act | One, Arkestra |
| One, As | One, Bold | One-Eyed Jack |
| One-Eyed Jacks | Oneida | Onelinedrawing |
| Oneness Of Juju | Oneohtrix Point Never | OneRepublic |
| Ones, The | OneTwo | Ong, Olivia |
| Onionhead | Only Child | Only If You Call Me Jonathan |
| Only Lonely | Only Ones | Only Real |
| Only, Jerry | Ono, Kim | Ono, Seigen |
| Ono, Yoko | Onom Agemo & The Disco Jumpers | Onono, Ben |
| Onset, The | Onslaught | Onuora, Oku |
| Onward International | Onwenu, Onyeka | Onyeabor, William |
| Onyeka The Torch | Onyx | Onyx, The |
| Ooberman | Oomph | Oosterhuis, Trijntje |
| Oozay | Oozing Wound | Opa |
| Opal | Opal Butterfly | Opaz |
| OPE | Opel, Jackie | Open Book |
| Open Hand | Open In Obscurity | Open Mike Eagle |
| Open Mind, The | Open Road | Open Sky |
| Open, The | Operahouse | Operation Ivy |
| Operator Please | Operators, The | Opeth |
| Ophthalamia | Opium Lord | OPM |
| OPM (Disco) | Oporto | Opossom |
| Oppenheimer | Opposition | Opsahl & Lindstedt |
| Optic Eye | Optic Nerve, The | Optimist Club |
| Optimistas, Los | Optimum Wound Profile | Optimystic |
| Opus | Opus '88 | Opus Dead |
| Opus III | Opus Int Music Ltd | Or-N-More |
| Ora | Ora, Rita | Orabge |
| Oraisòn, Jorge | Oral Exciters, The | Oram, Daphne |
| Orange (Shoegaze) | Orange Alabaster Mushroom, The | Orange And Blue |
| Orange Bicycle, The | Orange Blossom Sound | Orange Can |
| Orange Deluxe | ORANGE GOBLIN | Orange Juice |
| Orange Lights, The | Orange Peel | Orange Power |
| Orange, Richard | Oranger | Orans |
| Oranssi Pazuzu | Orb | Orbidöig |
| Orbison, Joy | Orbison, Roy | Orbit, William |
| Orbital | Orbo Equitum Solis | Orca |
| Orcas | Orch. Of The Amsterdam Phil. | Orchard, Marble |
| Orchard, Pat | Orchestra Baobab | Orchestra Filarmonica Di Roma |
| Orchestra Folklore Di Romagna | Orchestra Luna | Orchestra Makassy |
| Orchestra Of St. James, The | Orchestra Of The Opera-Comique | Orchestra Tango Cafe |
| Orchestra, Cardboard | Orchestra, Peace | Orchestra, Sauter-Finegan |
| Orchestre De L'Association | Orchestre De L'O.R.T.F. | Orchestre De La Suisse Romande |
| Orchestre De Monte Carlo | Orchestre De Paris | Orchestre Eddie Roger |
| Orchestre Jazira | Orchestre T.P.O.K. Jazz | Orchid |
| Orchid (DOOM) | Orchids (60S), The | Orchids, The |
| Ordeal, DJ | Order Of Apollyon, The | Order, Bogus |
| Ordinary Boys, The | Ordinary Man | Oregon |
| Orellana, Raúl | Oren, Peter | Orexis |
| Orff, Carl | Orford, Martin | Organ, The |
| Organisation | Organisms | Organization |
| Organized Konfusion | Organum | Orgazmo |
| Orgone Box | Orgy | Orianthi |
| Orielle | Orielles, The | Orient Express |
| Oriental Wind | Origin | Origin Unknown |
| Origin, The | Original Bedroom Rockers | Original Brasso Band, The |
| Original Cast Recording | Original Concept | Original Dixieland Jazz Band |
| Original DJ Vibes | Original Mirrors | Original Sound Track, The |
| Original Soundtrack | Original Surfaris | Original Trinidad Steel Band |
| Original Tuxedo Jazz Band, The | Original, The | Originals, The |
| Orioles, Felders | Orioles, The | Orion (Elvis) |
| Orion (Ryan Adams) | Orion The Hunter | Orkest, Metropole |
| Orkestra | Orla Wren | Orlando (60s) |
| Orlando (90s) | Orlando Johnson & Trance | Orlando Quartet |
| Orlando, Tony & Dawn | Orleans | Orleans, Ela |
| Orlons, The | Orme, Le | Ormonde Folk, The |
| Ornadel, Cyril | Ornament | Ornamental |
| Oroonies, The | Orozco, Rafael | Orphan Egg |
| Orpheus | Orphic Soop | Orquesta De Antonio Bustamante |
| Orquesta Española De Baile | Orquesta Tipica Union Sanluise | Orquestra Casino De Sevilla |
| Orquestra Sinfônica Brasileira | Orr, Benjamin | Orr, Michael |
| Orrall, Robert Ellis | Orrico, Stacie | ORS |
| Orson | Orson Family, The | Ortega, Jeannie |
| Ortiz, Cristina | Ortolani, Riz | Orton, Beth |
| Orwell, Paul | Orwells, The | Ory, Kid |
| Ory,Kid And Allen, Red | Oryema, Geoffrey | Orzabal, Roland |
| Os Brasileiros | Os Caretas | Os Diagonais |
| OS Mutantes | Os Originais Do Samba | Osa, Sigbjørn Bernhoft |
| Osanna | Osborne & Giles | Osborne Brothers, The |
| Osborne, Jeffrey | Osborne, Joan | Osborne, Mike |
| Osborne, Mike & Tracey, Stan | Osborne, Paul | Osborne, Tony |
| Osbourne, Johnny | Osbourne, Ozzy | Osby, Greg |
| Oscar | Oscar & Eugene Wright | Oscar D' León |
| Oscar Peterson & Milt Jackson | Oscillation, The | Ose |
| OSH | Oshik Levy & Naftaly Alter | OSI |
| Osiah | Osibisa | Osipov Academic Russian Folk O |
| Osiris (Funk) | Osiris (Prog) | Oskar, Lee |
| Oslin, K.T. | Oslo Philharmonic Orchestra | Osmond Boys |
| Osmond, Donny | Osmond, Jimmy | Osmond, Marie |
| Osmonds, The | Osmosis | Oso, Oso |
| Osorio, Jorge Federico | Ossian | Ossie & The Upsetters |
| Ossie Layne Show, The | Osterman Weekend, The | Ostrogoth |
| Osunlade | Osymyso | Otep |
| Other Half | Other Half, The | Other Ones (80S), The |
| Other Ones, The | Other People | Other Two, The |
| OTHERLiiNE | Othermothers, The | Others [1960S], The |
| Otherwise | Otis & The King Pins | Otis Johnny |
| Otis Williams And His Charms | Otis Williams And The Midnight Cowboys | Otis, Byron |
| Otis, Ed & Ben | Otis, Shuggie | Ottawan |
| Ottewell, Ben | OTTO | Otway & Barrett |
| Otway John | Ou Est Le Swimming Pool | Ouch |
| Ought | Oui 3 | Ouida & The Numbers |
| Ounsworth, Alec | Our American Cousins | Our Broken Garden |
| Our Daughters Wedding | Our Favourite Band | Our Future Feelings |
| Our Girl | Our Heaven | Our Hollow Our Home |
| Our Kid | Our Lady Peace | Our Lunar Activities |
| Our Tribe | Ousset, Cécile | Out Cold |
| Out For Justice | Out Hud | Out Lines |
| Out Of Darkness | Out Of My Hair | Out Of The Blue |
| Out Of Your Mouth | Out On Blue Six | Out With Mummy |
| Out, Papercut | Out, The | Out-Phaze |
| Outcasts | Outcry Collective | Outer Limits |
| Outer Limits, The | Outfield | Outhere Brothers, The |
| Outkast | Outlander | Outlandish |
| Outlaw Blues Band, The | Outlaw, Sam | Outlaws, The (Country) |
| Outlaws, The (UK) | Outlaws, The (US) | Outline, The |
| Outloud | Outnumbered, The | Outpatience, The |
| Outrage | Outrider | Outside |
| Outsiders (Punk), The | Outsiders, The | Outsiders, The |
| Outsiders, The | Outsiders, The (US) | Outskirts Of Infinity |
| Outskirts, The | Ov Sulfur | Ova |
| Oval | Ovary Lodge | Overall, Kassa |
| Overdraft, The | Overexposure | Overkill |
| Overlanders, The | Overload | Overload, Honcho |
| Overload, Shifty | Overlord | Overlord (Punk) |
| Overlords, The | Overmono | Override |
| Overstreet, Tommy | Overtones, The | Owen |
| Owen And Leon | Owen, Dylan | Owen, Mark |
| Owen, Michael | Owen, Nelson | Owen, Ray |
| Owen, Reg | Owen, Sid & Patty Palmer | Owens, Buck |
| Owens, Buck & Raye, Susan | Owens, Frank | Owens, Jack |
| Owens, Jamie | Owens, Jimmy | Owens, Robert |
| Owens, Tim 'Ripper' | Owens, Tony | Owl & Mouse |
| Owl Service, The | Owls | Owls, Fewer |
| Owston, Chuck | Oxbow | Oxfam Glamour Models |
| Oxford Nights, The | Oxford, Vernon | Oxide Neutrino |
| Oxley, Louie | Oxley, Tony | OXO |
| Oxxo Xoox | Oxy And The Morons | Oxygen Destroyer |
| Oxym | Oyster Band, The | Oysterband |
| Oysterhead | Oyuugi Wagamama Dan X PaRADEiS | OZ Magazine |
| Ozan, Mehmet | Ozark Mountain Daredevils, The | Ozo |
| Ozomatli | Ozone | Ozone, Makoto |
| Ozric Tentacles | Ozu, Masahiko | Ozzie Warlock And The Wizards |