- O
- OO
- OO
- OOak
- OakObi
- ObiObt
- ObtOce
- OceOct
- OctOdd
- OddODM
- ODOOf
- OfOfn
- OfnOh
- OhOhm
- OhmOK
- OKOkl
- OklOla
- OlaOld
- OldOli
- OliOli
- OllOly
- OlyOme
- OmeOmo
- OmoOnd
- OndONE
- ONEONE
- oneOnl
- Onlooe
- OohOpe
- OpeOpp
- OppOra
- OraOrc
- OrcOrd
- OrdOri
- OriOri
- OriOro
- OroOrs
- orsOsa
- OsaOsc
- OscOsp
- OSROth
- OthOtt
- OttOum
- OumOut
- OutOut
- OutOve
- OveOvi
- OviOwe
- OwiOxt
- OxxOzu
- OzuOZZ
- 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. Hanson
- Owl City feat. Hoppus, Mark
- Owl City feat. Jepsen, Carly Rae
- 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 Vision
- Owlle
- Owls (rock band from Chicago)
- Owls of the Swamp
- Owls, The
- Owman, Christine
- Öwnboss & Selva
- Öwnboss & Sevek
- Öwnboss, Sevek
- Ownglow (UK drum & bass artist; Sam Reeves)
- Owsey
- Owsley
- owtiss (emoplugg artist)
- 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
- 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. Célèbre Bauza, Le
- Oxmo Puccino feat. Dany Dan
- Oxmo Puccino feat. Diesel & Dadoo
- Oxmo Puccino feat. Lino
- Oxmo Puccino feat. Slake, Keity
- OXO (early 80s US dance pop group "Whirly Girl")
- Oxo 86
- Oxo 86 feat. André
- Oxo 86 feat. Chris
- Oxo 86 feat. Greg
- Oxo 86 feat. Hans
- Oxo 86 feat. Ole
- Oxon (Polish rapper)
- Oxtoby (Neil Oxtoby)