- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- OceOct
- OctOdd
- OddODE
- ODEOdu
- ODVOff
- OffOG
- OGOh
- OHOhm
- OhmOjo
- OjoOki
- OkiOla
- OlaOld
- OldOle
- OleOli
- OliOlo
- OloOma
- OmaOme
- OmeON
- ONOne
- OneONE
- ONEOne
- OneOnl
- OnlOnu
- OnwOpa
- OpaOph
- OphOR
- OrOrb
- OrbOrc
- OrcOre
- OreOri
- OriOrk
- OrkOrp
- OrpOrs
- Orsory
- OrzOsc
- OscOsl
- OslOst
- OstOti
- OtiOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxm
- OXOOzo
- OzoOZZ
- Owens, Jack (blues guitarist)
- Owens, Jennifer (Essex Solo Artist)
- Owens, Kelly Lee
- Owens, Kelly Lee feat. Cale, John
- Owens, Kelly Lee feat. Hval, Jenny
- Owens, Robert (US songwriter, producer, DJ and house vocalist)
- Owens, Tex
- Owens, Tim “Ripper”
- Owin y Jack
- Owiny Sigoma Band
- Owiyo, Suzanna
- Owl (German death metal band)
- Owl (Hard rock band)
- Owl & Mouse
- Owl City
- Owl City & Jepsen, Carly Rae
- Owl City & Yuna
- Owl City feat. Blacc, Aloe
- Owl City feat. Chrystopher, Shawn
- Owl City feat. Düren, Breanne
- Owl City feat. Hanson
- Owl City feat. Hoppus, Mark
- Owl City feat. Jepsen, Carly Rae
- Owl City feat. Lights
- Owl City feat. Nicole, Britt
- Owl City feat. Owen, Jake
- Owl City feat. Russell, Sarah
- Owl City feat. SEKAI NO OWARI
- Owl City feat. Stirling, Lindsey
- Owl Company
- Owl Eyes (Australian recording artist Brooke Addamo)
- Owl John
- Owl Paws
- Owl Service, The
- Owl, The (jazz group, Poland)
- Owlle
- Owlpark
- Owls (rock band from Chicago)
- Owls and the Orcas, the (Belgian pop rock band)
- Owls of the Swamp
- Owls, The
- Owman, Christine
- Öwnboss & Sevek
- Öwnboss, Sevek
- Ownglow (UK drum & bass artist; Sam Reeves)
- Owsey
- Owsley
- Owusu, Genesis
- Owusu, Genesis feat. Callinan, Kirin J
- OWV (Our only Way to get Victory)
- OX (Canadian lo-fi indie rock band)
- Ox (Brighton, UK rock band)
- Ox (rapper Christopher Wilkes, performs on the MadWorld OST)
- OX (german post-grunge Band)
- Ox en Mayo Alto
- Ox, Matt
- ox33n
- Oxa, Anna
- Oxa, Anna & Leali, Fausto
- Oxa, Anna feat. Leali, Fausto
- Oxbow (experimental rock band)
- Oxen ((Swedish Indie Rock Band))
- Oxford & Co.
- Oxford Camerata (English chamber choir)
- Oxford Camerata, Summerly, Jeremy
- Oxford Collapse
- Oxford Drama
- Oxford, Charlie
- Oxford, Doña
- Oxhole
- Oxia
- Oxia feat. Miss Kittin
- Oxide & Neutrino
- Oxide & Neutrino feat. Harvey
- Oxide & Neutrino feat. Kaish
- Oxide & Neutrino feat. Kowdean
- Oxide & Neutrino feat. Swiss, Skat D, Kaish & Harvey
- Oxidize
- Oxidize (Swedish metal band)
- Oxiplegatz
- Oxlade
- Oxley
- Oxmo Puccino
- Oxmo Puccino & Jazzbastards, The
- Oxmo Puccino feat. Booba
- Oxmo Puccino feat. Caballero & JeanJass
- Oxmo Puccino feat. Dany Dan
- Oxmo Puccino feat. Diesel & Dadoo
- Oxmo Puccino feat. Lino
- Oxmo Puccino feat. Slake, Keity
