- O
- OO
- OO
- OOak
- OakObe
- ObeObr
- OBSOce
- OceOch
- OchOct
- OctOde
- OdeOdo
- OdoOf
- OfOff
- OffOgr
- OgrOha
- Oiz
- OizOka
- OKAOkw
- OkYOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOm
- OmOmi
- OMIOn
- OnOne
- OneOne
- OneONE
- oneOnl
- OnlOnu
- OnuOoy
- OozOpe
- OpgOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOri
- OriOrn
- OrnOrq
- OrqOrt
- OrtOsb
- OsbOsh
- OshOss
- OssOte
- OteOtt
- Ott
- Out
- OutOut
- OutOut
- OutOve
- OveOvi
- OviOwl
- OwlOXO
- OxoOzo
- OzoOZZ
- Oreja (UK producer/DJ Paul Dolby aka Seiji)
- Oreja de Van Gogh, La
- Orellana Lucca
- Orellana, Raúl (DJ & producer)
- Orellana, Raúl feat. Brown, Jocelyn
- Orellana, Roberto
- Orelle (Italian artist Elisabetta Pasquale)
- Orelsan
- Orelsan & Gringe
- Orelsan & Toxic Avenger, The
- Orelsan feat. Cordae
- Orelsan feat. Damso
- Orelsan feat. Gims
- Orelsan feat. Gringe
- Orelsan feat. Ibeyi
- Orelsan feat. Nekfeu & Rascal, Dizzee
- Orelsan feat. Neptunes, The
- Orelsan feat. Skread
- Orelsan feat. Stromae
- Orelsan feat. Thal, Ron “Bumblefoot”
- Oremuz
- Oren, Foreign
- Oren, Peter
- Orenstein, Janet
- Orenstein, Norman
- ORESAMA
- ORESKABAND
- Orestea (UK band)
- Oreya
- Orfeó Català
- Orff, Carl (composer)
- Orford, Martin
- Organ (Finnish synth pop group)
- Organ Beats, The
- Organ Donor (Richmond, VA Death Metal Band)
- Organ Donor (early 2000s rock band)
- Organ Donors (hard dance group)
- Organ Freeman
- Organ, Samuel
- Organ, The
- Organ, Tyne-James
- Organ, Willy (Belgian weirdo synthpop artist Simon Platteau)
- Organectomy (New Zealand brutal death metal)
- Organek, Tomek
- Organic Audio
- Organica
- Organised Scum
- 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 Konfusion feat. Hurricane G
- Organized Konfusion feat. Rude One, DJ
- Organized Noize (Atlanta hip-hop production group)
- Organized Rhyme
- Organizing Committee, The
- Orgel Sound J‐pop
- Orgi-E (Danish Rapper)
- Orgi-E feat. Winther, Bjarke
- Orgil
- Orgone (US funk band)
- Orgone feat. de León, Adryon
- Orgone feat. Franklin, Fanny
- Orgonite (Rave band based in israel)
- Orgullo Nativo
- Orgy (US rock band)
- Orhan, Mahmut
- Orhan, Mahmut & Şener, Sena
- Orhan, Sevcan
- Orhon, Cüneyd
- Ori (folktronica singer songwriter Ori Alboher)
- Ori, Viktor
- Oriach, Riccie (Tropical artist from the dominican republic)
- Oriain, Charlie
- Oriakhi, Davina
- Orialus
- Oriana (Argentine model, actress and singer)
- Oriana Nash (American singer-songwriter, Oriana Isabel Nash)
- Orianthi
- Óriás
- Oribasi, Lisa (Swiss singer‐songwriter)
- Oribu
- Orielles, The
- Orient Expressions
- Orient Expressions feat. Aynur
