- O
- OO
- OO
- OO
- OOaf
- OAFOaK
- OakOBE
- ObeObn
- OBO
- Oce
- OceOCS
- OCTOct
- OctOdd
- OddODE
- ODEOdo
- OdoOf
- OfOff
- OffOff
- OffOgr
- OgrOh
- ohOHM
- OHNOiz
- OizOka
- OkaOkl
- OklOla
- OlaOld
- OldOld
- OldOle
- OleOli
- OliOli
- OLIOls
- OlsOlz
- OmOma
- OmaOme
- OmeOmo
- Omo
- One
- OneOne
- ONEOne
- OneONE
- OneOnl
- OnlONR
- OnsOok
- OokOPE
- OpeOPF
- OPFopt
- OptOra
- OraOrb
- OrbOrc
- OrcOrc
- OrcOre
- OreOrg
- OrgOri
- OriOrk
- OrkOrn
- OrnOrq
- OrqOrr
- OrrOrt
- OrtOsb
- OsbOsc
- OscOsl
- OslOst
- OstOte
- OteOto
- OtoOtt
- OttOub
- OubOur
- OurOut
- OutOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOwl
- OwlOxo
- OxoOzc
- OzcOzu
- Ozuozz
- Owl Paws
- Owl Service, The
- Owl Vision
- Owl, The (jazz group, Poland)
- owlh
- Owlle
- Owlpark
- Owls (rock band from Chicago)
- Owls and Orcas, The (Belgian pop rock band)
- Owls of the Swamp
- Owls, Miguel (Singer for Save Us)
- Owls, The (indie pop band from Minneapolis)
- Owltian Mia
- Owman, Christine
- Own Devices (Soul)
- Öwnboss & Sevek
- Öwnboss, Sevek
- Owned (alternative rock)
- Ownglow (UK drum & bass artist; Sam Reeves)
- Owsey
- Owsey feat. Ayelle
- Owsi (French rapper)
- Owsley
- owtiss (emoplugg artist)
- Owusu & Hannibal
- Owusu, Genesis
- Owusu, Genesis feat. Callinan, Kirin J
- Owusu, Jewel
- Owusu, Philip
- OWV (Our only Way to get Victory)
- OX (Canadian lo-fi indie rock band)
- Ox (rapper Christopher Wilkes, performs on the MadWorld OST)
- OX (german post-grunge Band)
- Ox en Mayo Alto
- Ox, Matt
- OX:N
- ox33n
- Oxa, Anna
- Oxart
- Oxbow (experimental rock band)
- Oxbow ft. Lingua Ignota
- Oxbow ft. Manning, Roger Joseph, Jr.
- Oxen ((Swedish Indie Rock Band))
- Oxenryd, Sandra
- Oxford & Co.
- Oxford Camerata (English chamber choir)
- Oxford Camerata, Schola Cantorum of Oxford, Carey, Colm, Summerly, Jeremy
- Oxford Camerata, Summerly, Jeremy
- Oxford Collapse
- Oxford Drama
- Oxford, Charlie
- Oxford, Doña
- Oxford, Lauren
- Oxford, Vernon (country)
- Oxford's, Los (Mexican rock band)
- Oxhole
- Oxia
- Oxia feat. Kittin
- Oxide & Neutrino
- Oxide & Neutrino feat. Kaish
- Oxide & Neutrino feat. Kowdean
- Oxide & Neutrino feat. Sef
- Oxide & Neutrino feat. Swiss, Skat D, Kaish & Harvey
- Oxidize
- Oxidize (Swedish metal band)
- Oxiplegatz
- Oxis (DIY electronic artist)
- 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 (French rapper)
- Oxmo Puccino & Cream, DJ
- 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
- Oxmo PuccinoFeaturingSolaar, MC
- oXni (French rapper Julia Maura)
- OXO (early 80s US dance pop group "Whirly Girl")
- Oxo 86
