- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeObl
- oblObs
- ObsOce
- OceOch
- OchOCT
- OctODC
- ODCOdd
- OddOde
- OdeODU
- ODUof
- ofOFF
- OffOFK
- OfMOgr
- OgrOh
- OhOhi
- OhiOim
- OimOK
- OKOke
- OkeOl
- OlOl
- OlaOld
- OldOle
- OleOlg
- OlgOli
- OliOli
- OliOls
- OlsOma
- OmaOma
- OmaOme
- OmeOmn
- OmnOn
- OnOne
- OneOne
- OneOne
- OneOne
- OneOnk
- OnkOno
- OnoOny
- OnyOos
- OosOpe
- OpeOPL
- OPMOpu
- OpuOra
- OraOrb
- OrbOrc
- OrcOrd
- OrdOre
- OreOri
- OriOri
- OriORK
- OrkOro
- OroOrq
- OrqOrr
- OrrOrt
- OrtOsa
- OsaOsc
- OscOSK
- OskOss
- OssOta
- OtaOth
- OthOtt
- OttOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOv
- OvOve
- OveOVE
- OVEOwe
- OweOwl
- OwlOxm
- OxmOza
- OzaOzo
- OzoOzz
- Orelsan feat. Stromae
- Orelsan feat. Thal, Ron “Bumblefoot”
- Orelsan feat. Yamê
- Orelsan with Bangalter, Thomas
- Oremuz
- Oren, Foreign
- Oren, Peter
- Orenstein, Janet
- Orenstein, Norman
- Oreo Moon (Finnish band)
- ORESAMA
- ORESKABAND
- Oreste & His Queensland Orchestra
- Orestea (UK band)
- Oresteia
- Orestes (Indonesian metal band)
- Oreya
- Orezi (Nigerian musician Esegine Allen)
- Orfeo (Eddy de Clercq, Otto van den Toorn)
- Orfeó Català
- Orff, Carl (composer)
- Orff, Carl; Anderson, June, Weikl, Bernd, Creech, Philip, Chicago Symphony Chorus, Chicago Symphony Orchestra, Levine, James
- Orff, Carl; Berliner Philharmoniker, Shinyukai Choir, Ozawa, Seiji
- Orff, Carl; Blegen, Judith, Riegel, Kenneth, Binder, Peter, Cleveland Orchestra Chorus, The, Cleveland Orchestra Children’s Chorus, Page, Robert, Cleveland Orchestra, The, Tilson Thomas, Michael
- Orff, Carl; Hartmann, Gerda, Brünner, Richard, Knoll, Rudolf, Mozarteum Chor Salzburg and Mozarteum Orchester Salzburg, Prestel, Kurt
- Orfield, Carson
- Orford, Martin
- Orgaanklap
- Organ (Finnish synth pop group)
- ORGAN (Incognito producer)
- Organ Beats, The
- Organ Donor (Richmond, VA Death Metal Band)
- Organ Donor (early 2000s rock band)
- Organ Donors (hard dance group)
- Organ Freeman (US)
- Organ Tapes
- Organ, Samuel
- Organ, Samuel feat. Dazey
- Organ, The
- Organ, Tyne-James
- Organ, Tyne-James & Gordi
- Organ, Willy (Belgian weirdo synthpop artist Simon Platteau)
- Organectomy (New Zealand brutal death metal)
- Organek, Tomek
- Organic Audio
- Organic Call (Tokyo 4-piece band)
- Orgânico, Mirele & Froid
- Organisation (Krautrock band with members of Kraftwerk)
- Organised Scum
- Organism, The
- Organismen (Swedish rapper)
- Organismen & Large, DJ
- Organismen & Large, DJ
- Organiz' (French R'n'B duo)
- Organización X
- Organización, La
- Organization, The (90s US funk metal band)
- Organized Family (Zambian music duo)
- Organized Konfusion (US alternative hip hop duo from Queens, NYC)
- Organized Noize (Atlanta hip-hop production group)
- Organizing Committee, The
- Organizm
- Orgasmo (Bolivian Funk Rock Band)
- ORGAVSM
- Orgel Sound J‐pop (orgel group)
- Orgel, Matthew
- Orgg
- Orgi-E (Danish Rapper)
- Orgi-E feat. Jooks
- Orgi-E feat. Marwan
- Orgi-E feat. Winther, Bjarke
- Orgi-E feat. Xander
- Orgil
- Orgnn
- Orgnners, The
- Orgonášová, Ľuba, Slovenského rozhlasu, Symfonický orchester, Humburg, Will
- Orgone (US funk band)
- Orgone feat. de León, Adryon
- Orgonflow
- Orgonite (Rave band based in israel)
- Orgullo Nativo
- Orgy (US rock band)
- Orhan, Mahmut
- Orhan, Mahmut & Colonel Bagshot
- Orhan, Mahmut & Eneli
- Orhan, Mahmut, Arutan, Ali & Selin
- Orhan, Sevcan
- Orhon, Cüneyd
- Orhon, Ozan
- Ori (folktronica singer songwriter Ori Alboher)
