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'halloran, Dustin | 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, Johnny |
| 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'Neill, Matthew | O'Riordan, Dolores | O'Rouke, Jim |
| O'Rourke, Declan | O'Rourke, Fran | 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., Jenny | O.A.R (Of A Revolution) | O.C Roberts |
| O.C. | O.Children | O.D, Adrenalin |
| O.G.C. | O.M.D. | O.R.B |
| O.T. Quartet | O.T.T | O.W.L. |
| 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 |
| Obey, Trust | OBF | Obi |
| Obi, Ras | Obie Trice | Obituary |
| Objayda | Objekt | Obliveon |
| Oblivion, Heron | Obraztsova, Elena | Obscura |
| Obsequiae | 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 | Octotron, Dr |
| Oculus | Odd Man Out | Oddie, Bill |
| Odds & Ends | Odell, Tom | Odesza |
| Odetta | Odin | Odnoposoff, Ricardo |
| Odonis, Odonis | 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 |
| Oferwintran | Off | Off The Wall |
| Off With Their Heads | OFF! | Off, Half |
| Off-Shore | Offenbach (Rock) | Offenbach, Jacques |
| Offenders | Offenders, The | Offering |
| Offhooks, The | Official Secrets, The | Offshore |
| Offspring | Ofshore | Ofwerman, Rune |
| Ogan, Gary & Lamb, Bill | Ogawa, Yusuke | Ogdens, The |
| Ogdon, John | Ogdon, John & Lucas, Brenda | Ogerman, Claus |
| Ogermann, Claus | Oggum | Ogre, Meaty |
| Ogunde, Hubert | Ogura, Kei | Oh No |
| Oh No Ono | Oh Ok | Oh Well |
| Oh Wonder | Oh! Polo | Oh' Dev |
| Oh, Atoms | Oh, Nadia | Ohashi, Junko |
| ohGr | OHGR WELT | Ohhms |
| Ohi Ho Bang Bang | Ohio Express | Ohio Players |
| Ohlsson, Garrick | OHM | Ohno, Shunzo |
| Ohno, Yuji | Ohnuki, Taeko | Ohrn, Josefin + The Liberatio |
| Ohtani, Kazuo | 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 | Oktagon |
| Okumoto, Ryo | Ol Dirty Bastard | Ola |
| 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 Gods Of Asgard | 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, Mondeé | 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 |
| Omen, Macabre | 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 Our Own Clock |
| 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 |
| Ondara, J.S. | Ondatrópica | Ondolo, John |
| Ondskapt | One | One [AOR] |
| One 2 Many | One AM Radio, The | One Blood |
| One Car Pile-Up | One Day As A Lion | One Dove |
| One Eleven Heavy | 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, Para |
| One-Eyed Jack | One-Eyed Jacks | OneDa |
| Oneida | Oneirogen | 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 Sun | Only, Jerry | Ono, Kim |
| Ono, Seigen | Ono, Yoko | Onom Agemo & The Disco Jumpers |
| Onono, Ben | Onra | 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 [Rock] | Opus Dead |
| Opus III | Opus Int Music Ltd | Or-N-More |
| Ora | Ora, Rita | Orabge |
| Oraisòn, Jorge | Oral | 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, Mandolin | Orange, Richard |
| Oranger | Orans | Oranssi Pazuzu |
| ORB | Orb | Orb, Alice's |
| 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 Skin & Bone | Orchestra Of St. James, The |
| Orchestra Of The Opera-Comique | Orchestra Tango Cafe | Orchestra, Apocalypse |
| Orchestra, Cardboard | Orchestra, Dadavistic | Orchestra, Fire! |
| Orchestra, Hidden | 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 (Rock), The |
| Orchids, The | Orcustus | Ordeal, DJ |
| Order Of Apollyon, The | Order, Bogus | Order, Natural |
| Order, Outlaw | Ordinary Boys, The | Ordinary Man |
| Ordination Of Aaron | Oregon | Orellana, Raúl |
| Oren, Peter | Orexis | Orff, Carl |
| Orford, Martin | Organ, M. | Organ, The |
| Organisation | Organisms | Organization |
| Organized Konfusion | Organum | Orgazmo |
| Orgone Box | Orgy | Orianthi |
| Orielle | Orielles, The | Orient Express |
| Oriental Wind | Origami Angel | 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 | Orphan Egg | Orpheus |
| Orphic Soop | Orquesta De Antonio Bustamante | Orquesta Española De Baile |
| Orquesta La Justicia | Orquesta La Solución | Orquesta Tipica Union Sanluise |
| Orquestra Casino De Sevilla | Orquestra Sinfônica Brasileira | Orr, Benjamin |
| Orr, Buxton | Orr, Michael | Orrall, Robert Ellis |
| Orrico, Stacie | ORS | Orson |
| Orson Family, The | Orta, Paul | Ortega, Jeannie |
| Ortega, Lindi | Orthodox | 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 All Stars |
| 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, Royel | 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 | 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 A Bang! | Out With Mummy |
| Out, Papercut | Out, Strung | Out, The |
| Out-Phaze | Outburst | Outcast |
| Outcasts | Outcry Collective | Outer Limits |
| Outer Limits, The | Outerlimit, 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 |
| Outo | 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 |
| Ovaltineys, The | Ovary Lodge | Overall, Kassa |
| Overdraft, The | Overexposure | Overkill |
| Overlanders, The | Overload | Overload, Honcho |
| Overload, Shifty | Overlord | Overlord (Punk) |
| Overlord X | Overlords, The | Overmono |
| Override | Oversize | 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 |
| Ox Scapula | 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 | Ozz |
| Ozzie | Ozzie Warlock And The Wizards |