- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOce
- OceOct
- OctOdd
- OddOde
- OdeOef
- OehOff
- OffOgd
- OgdOh
- OhOi
- OiOk
- okOku
- OkuOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOMB
- OMBOmn
- OmnO
- OnaOne
- OneOne
- OneOng
- OngOno
- OnoOom
- OomOpe
- OpeOpt
- optOra
- OraOrc
- OrcOrd
- OrdOrh
- OrhOri
- OriOrm
- OrmOrq
- OrqOrt
- OrtOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxl
- OxlOzm
- OZMOZZ
- Orange Park
- Orange Peels, The
- orange pekoe (real‐world J‐pop duo)
- ORANGE RANGE
- Orange Sector
- Orange Sky (A rock band from the Caribbean Island of Trinidad and Tobago)
- Orange Skyline (Dutch rock band)
- Orange Street (Rock Band from India)
- Orange-I (Belgian 1990/2000s band)
- Orange, Adrian
- Orangefarm (New Zealand indie rock)
- Oranger
- Oranges (post-hardcore/math rock band)
- Oranges & Lemons
- Oranges Band, The
- Orangestar
- Orangez
- Orango
- Oranj Symphonette
- Oranssi Pazuzu (Finnish black metal)
- Orantes, Francisco (Christian music singer-songwriter)
- Orantes, Francisco feat. Orantes, Azucena
- Orantes, Marilú (Christian music artist)
- Oranžās Brīvdienas
- Oratnitza
- Oratorio
- Oratorio The World God Only Knows
- Oratory
- Orax (Italian)
- Orazbayeva, Aisha (Kazakh violinist)
- ORB (Australian prog rock)
- Orb (Lithuanian stoner)
- Orb, The
- Orb, The & Perry, Lee “Scratch”
- Orb, The feat. Perry, Lee “Scratch”
- Orba Squara
- Orbach, Jerry
- Orbach, Jerry, Lansbury, Angela and Chorus
- Orbakaitė, Kristina
- Orbans, The
- Orbison, Joy
- Orbison, Joy & Boddika
- Orbison, Joy w/ Sen, Léa
- Orbison, Roy
- Orbison, Roy & Harris, Emmylou
- Orbison, Roy & Lang, K.D.
- Orbison, Roy & Melson, Joe
- Orbison, Roy & Teen Kings, The
- Orbison, Roy and Teen Kings, The
- Orbison, Roy feat. Harris, Emmylou
- Orbison, Roy feat. Lang, K.D.
- Orbison, Roy with Cash, Johnny, Lewis, Jerry Lee and Perkins, Carl
- Orbit (Boston‐based rock band)
- orbit (German indie pop)
- Orbit Culture (melodic death metal/groove metal)
- Orbit Service
- Orbit, William (English musician, composer and record producer)
- Orbit, William feat. Orton, Beth
- Orbit, William feat. Scattergood, Polly
- Orbita Wiru (Polish rock group)
- Orbital (UK techno group)
- Orbital & Badalamenti, Angelo
- Orbital & Hammett, Kirk
- Orbital & Lady Leshurr
- Orbital & Sleaford Mods
- Orbital Alignment (Progressive Death Metal from Nottingham, UK)
- Orbital feat. Gray, David
- Orbital feat. Hammett, Kirk
- Orbital feat. Hawking, Stephen
- Orbital feat. Lady Leshurr
- Orbital feat. Little Pest, The
- Orbital feat. Mediæval Bæbes
- Orbital feat. Mediæval Bæbes
- Orbital Junction (UK rock band)
- orbital voices
- Orbital, Sleaford Mods
- Orbiter (Stephen Walking & 7 Minutes Dead)
- ORBS
- Orbweavers, The (Melbourne Band)
- Orc (progressive metal band from Lansing, MI, USA)
- Orca (UK early 1990’s breakbeat production duo)
- Orca (Psychedelic trance artist)
- Orca Eroticae
- Orca Team
- Orcas
- Orchards (band from Brighton, UK)
- Orchards (Des Moines)
- Orchester der Deutschen Oper Berlin, Jochum, Eugen
- Orchester der Vereinigten Bühnen Wien
- Orchester der Wiener Volksoper, Kantschieder, Paul