- O
- OO
- OO
- OOak
- OakObi
- ObiObu
- ObOce
- OceOct
- OctOdd
- OddOdo
- OdoOfa
- OfdOG
- OGOh
- OhOhn
- OHOOK
- OKOkt
- OktOld
- OldOle
- OleOli
- OliOlm
- Oma
- OMAOmg
- omgOn
- OnOne
- OneOne
- OneONE
- ONEOno
- OnoOon
- OonOpe
- OpeOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOrl
- OrlOrq
- OrqOrt
- OrtOsb
- OsbOsk
- OskOst
- OstOti
- OtiOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOwe
- OweOx
- Ox
- OZZ
- Orantes, Marilú (Christian music artist)
- Oranžās Brīvdienas
- Orator (Bangladesh | Death/Thrash Metal)
- Oratorio
- Oratorio The World God Only Knows
- Orax (Italian)
- Orb (Lithuanian stoner)
- Orb, The
- Orb, The & Perry, Lee “Scratch”
- Orb, The feat. 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 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 feat. Penelope Isles
- 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
- 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
- Orchester Gino Mariano
- Orchester Reto Parolari
- Orchester Werner Tauber
- Orchestra
- Orchestra (Hot Spot Orchestra)
- Orchestra Bagutti
- Orchestra Baobab (Senegalese Afro-Cuban band)
- Orchestra Capri
- Orchestra Città di Ferrara
- Orchestra del Teatro alla Scala di Milano, Serafin, Tullio
- Orchestra del Teatro dell’Opera di Roma
- orchestra di Piazza Vittorio, L’
- ORCHESTRA FUEGO
- Orchestra Harlow
- Orchestra JB
- Orchestra Marrabenta Star de Moçambique
- Orchestra Marrabenta Star de Moçambique feat. Wazimbo
- Orchestra Morphine
- Orchestra Mozart
- Orchestra of Syrian Musicians, The
- Orchestra of the Mariinsky Theatre, Gergiev, Valery
- Orchestra of the Royal Opera House, Covent Garden
- Orchestra Rosichino (Grande Orchestra Rosichino)
- Orchestra Super Mazembe
- Orchestra, Bert Kaempfert