- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeObl
- OblOb
- ObvOce
- OceOch
- OchOct
- OctOdd
- OddOde
- OdeOdi
- OdiODZ
- ODZOfe
- OfeOff
- OffOgb
- OgbOh
- OhOha
- ohaOi
- OiOjo
- Ojooka
- OkaOku
- OkuOla
- OlaOld
- OldOle
- OleOle
- OleOli
- OliOli
- OliOls
- OlsOMA
- OmaOma
- OmaOme
- OmeOmn
- OMNON
- ONOne
- OneOne
- OneOne
- OneOne
- OneONL
- ONLOno
- Onooof
- OogOpa
- OpaOpe
- OpeOpp
- OppOr
- OrOra
- Oraorb
- OrbOrc
- OrcOrd
- OrdOrg
- OrgORI
- OriOri
- OriOrl
- OrlOro
- OroOrq
- OrqOrt
- OrtOry
- oryOsb
- OsbOSE
- OSEOsm
- OsmOst
- OstOte
- OteOTP
- OTPOtt
- OttOub
- OubOur
- OurOut
- OutOut
- OutOut
- OutOve
- OveOve
- OveOwa
- OwaOwi
- OwlOxi
- OxiOza
- OzaOzo
- OzoOZZ
- Otero, David ft. Cepeda
- Otero, David ft. Despistaos
- Otero, David ft. Fernández, Dani
- Otero, David ft. Georgina & Funambulista
- Otero, David ft. Guerra, Ana
- Otero, David ft. Mäbu
- Otero, David ft. Soto, Marta
- Otero, David ft. Taburete
- Otero, David ft. Torres, Iván
- Otero, David, Nil Moliner & Arnau Griso
- Otero, Manolo
- Otero, Willito
- otetsu
- otetsu feat. GUMI
- Otey, Lisa
- OTF Boonie Moe
- OTF Boonie Moe, Rob49 & Only the Family
- Otgoo
- OTH
- Otha (Othalie Husøy)
- Othalan (Polish Folk Metal)
- Othello (Théo Celino)
- Other Colors, The
- Other Ego
- Other End, The (Norwegian duo)
- Other Favorites, The
- Other Guys, The (Scottish A Cappella Group)
- Other Lives (US indie rock band)
- Other Men
- Other Minds (Alternative Rock Band)
- Other Ones, The (Australian-German band, hit single "Holiday")
- Other Other Brothers, The
- Other Stars, The (Indie Rock)
- Other Two, The
- Other Voices (Italian goth)
- Other Years, The
- Other-ed
- Other, The (horrorpunk band from Germany)
- Other, The (US punk rock band)
- Otherkin
- OTHERLiiNE (George Fitzgerald & Lil Silva)
- Others by No One
- Others, The (UK dubstep producer)
- Others, The (2000s UK rock band)
- Others, The (60's US garage rock band from Kingston, RI)
- Others, The feat. Geoff Smith
- Otherside, The (80s Dutch beat group)
- Otherside, The (US psychedelic band)
- Otherview
- Otherwise (US hard rock band)
- Otherwise feat. Costello, Ashley
- Otherwish (Progressive house musician)
- Othila (neofolk / ambient group)
- Othmane Bali
- Othmer, Julia
- Othuum (german doom metal band)
- Otierre
- Otik (dance music)
- Otile Brown
- Otilia (Otilia Bruma)
- Otira (French DJ & producer Mederic Martin)
- Otis (southern blues rock from Sulphur Well, KY)
- Otis (Alternative rock/post-grunge band from Phoenix, Arizona.)
- Otis (Mozambican saxophone player)
- Otis Stacks
- OTIS VCR
- Otis Waygood Blues Band
- Otis Zola
- Otis, Johnny
- Otis, Johnny & His Orchestra
- Otis, Johnny, Otis, Johnny, Show, The
- Otis, Johnny, Show, The
- Otis, Johnny, The, Rhythm & Blues Caravan
- Otis, Jon (American drummer, producer, bandleader)
- Otis, Jon (British pop singer from the 1980s)
- Otis, Shuggie
- Otkroveniya dozhdya
- Otlo
- Otnicka (Electronic Musician)
- OTNOSE. & plagueinside
- Oto
- oto (Pascal Hubert, Farid Dahalb & François Rousseau)
- Otoboke Beaver
- Otocol (breakcore/idm, f.k.a. Chipper)
- Otoda, Masanori
- Otoha (Japanese singer-songwriter and guitarist)
- Otokogumi
- Otomo, Yoshihide
- Otonose, Kanade (ReGLOSS)
- OTP
