- O
- OO
- OO
- OO
- OOaf
- OAFOaK
- OakOBE
- ObeObn
- OBOOca
- Oce
- OceOCS
- OCSOct
- OctODD
- OddODE
- ODEOdo
- OdoOf
- OfOff
- OffOff
- OffOGR
- oh
- OhOhm
- OhmOiz
- OizOka
- OkaOkl
- OklOla
- OlaOld
- OldOld
- OldOle
- OleOli
- OliOli
- OliOlr
- OlrOly
- OlyOma
- OmaOme
- OmeOmn
- OmnOna
- OnaOne
- OneOne
- OneOne
- OneOne
- oneOnl
- OnlOno
- OnoOok
- OokOp
- OpeOpe
- OpeOps
- OpsOra
- OraOra
- OraOrc
- OrcOrc
- OrcOre
- OreOrg
- OrgOri
- OriOri
- Oriorm
- OrnOrp
- OrpOrq
- OrqOrt
- OrtOsa
- OsaOsc
- OscOsk
- OskOss
- Oss
- OtaOti
- OtiOtt
- Ott
- Our
- OurOut
- OutOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOwl
- OwlOxl
- OxlOzb
- Ozb
- ozz
- Orna
- Ornament (Afghan Whigs and Marcy Mays)
- Ornamento y Delito
- Ornaments (Italian band)
- Ornate
- Ornate feat. Jack the Underdog
- Ornatos Violeta
- Orne
- Ornelas, Raúl
- Ornella Napolitani
- Ornella Thiry
- Ornery (Folk punk band from Vancouver, BC, Canada)
- Ornette (French‐Italian singer‐songwriter multi‐instrumentalist)
- Ornithology (Performance name of Shaan Chhadva)
- Ornob
- ORO (Uruguay)
- Oro Negro (Grupo de Ecuador)
- Oro Sólido
- Oro Swimming Hour
- Oro y Plata, Dueto
- Orobians, The
- Orochen (Post-rock / folk from Sweden)
- Orochi (Brazilian rapper)
- Orodruin (Traditional Doom Metal band from U.S.A.)
- Orofino, Richard
- Orok, Shayne
- Orok, Shayne & Orok, Ali
- Öröm
- Oronti
- Oropesa, Omar (Christian music singer)
- Ôros Kaù (Belgian black metal)
- Orouni
- Oroza, Bobby
- Oroza, Bobby & El Michels Affair
- Oroza, Bobby feat. Cold Diamond & Mink
- Orozco Barrientos
- Orozco, Alejandra
- Orozco, Antonio (Spanish singer-songwriter)
- Orozco, Antonio & Fonsi, Luis
- Orozco, Antonio & Juanes
- Orozco, Antonio & KAROL G
- Orozco, Antonio & Martín, Dani
- Orozco, Antonio & Pereyra, Luciano
- Orozco, Antonio & Raphael
- Orozco, Antonio & Soledad
- Orozco, Antonio & Yatra, Sebastián
- Orozco, Antonio con Malú
- Orozco, Antonio feat. Fonsi, Luis
- Orozco, Antonio feat. Malú
- Orozco, José Darío
- Orozco, José-Luis
- Orozco, Rafael (pianist)
- Orozco, Regina
- Orozco, Verónica
- Orphan (80's band from Winnipeg, Canada)
- Orphan (deathcore band)
- Orphan Boy
- Orphan Hate
- Orphan Newsboys, The
- Orphan Prodigy
- Orphan Project
- Orphan Songs
- Orphan Swords (Belgian duo)
- Orphan Zero
- Orphanage
- Orphaned Land
- Orphaned Land & Amaseffer
- Orphaned Land feat. Hackett, Steve
- Orphaned Land feat. Koray, Erkin
- Orphaned Land feat. Kürsch, Hansi
- Orphaned Land feat. Lindberg, Tomas
- Orphaned Land feat. Poliker, Yehuda
- Orphaned Land feat. Wilson, Steven
- Orphans, The (West Chester, PA (USA) punk band)
- Orphans, The (Australian power pop)
- orphantwin
- Orpharion
- Orphax (Dutch ambient / drone musician)
- Orphean Passage
- Orphei Drängar
- Orphei Drängar, Sund, Robert
- Orpheus (Australian death metal band)
- Orpheus (1960s–70s Boston rock band)
- Orpheus (masquerade drag artist)
- Orpheus Boys Choir (on 1974 Schonberg BBC cd & 1996 Christmas cd)
- Orpheus Chamber Orchestra (US orchestra)
- Orpheus Ensemble, The
- Orpheus Nine
- Orpheus Omega
- Orphies
