- O
- OO
- OO
- OOak
- OakObe
- ObeObr
- OBSOce
- OceOch
- OchOct
- OctOde
- OdeOdo
- OdoOf
- OfOff
- OffOgr
- OgrOha
- Oiz
- OizOka
- OKAOkw
- OkYOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOm
- OmOmi
- OMIOn
- OnOne
- OneOne
- OneONE
- oneOnl
- OnlOnu
- OnuOoy
- OozOpe
- OpgOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOri
- OriOrn
- OrnOrq
- OrqOrt
- OrtOsb
- OsbOsh
- OshOss
- OssOte
- OteOtt
- Ott
- Out
- OutOut
- OutOut
- OutOve
- OveOvi
- OviOwl
- OwlOXO
- OxoOzo
- OzoOZZ
- 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 Orcas, The (Belgian pop rock band)
- Owls of the Swamp
- Owls, The
- Owman, Christine
- Own Devices (Soul)
- Öwnboss & Sevek
- Öwnboss, Sevek
- Ownglow (UK drum & bass artist; Sam Reeves)
- Owsey
- Owsley
- Owusu & Hannibal
- Owusu, Genesis
- Owusu, Genesis feat. Callinan, Kirin J
- Owusu, Philip
- 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))
- Oxenryd, Sandra
- 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
- Oxlade & Ipupa, Fally
- Oxlade & Popcaan
- Oxlade feat. Dave
- Oxlade feat. N'abania, Flavour
- Oxlade feat. Owó, Tomi & Ojahbee
- Oxlade feat. Sarkodie
- Oxlade feat. Wande Coal
- 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
- OXO (early 80s US dance pop group "Whirly Girl")
