- O
- OO
- OO
- OOak
- OakOb
- ObeObo
- OBOOce
- OceOch
- OchOct
- Odd
- OddODM
- ODOOf
- OfOff
- OFFOgr
- OgrOh
- OhOIR
- OirOKA
- OkaOku
- OkuOla
- OlaOld
- OldOli
- OliOli
- OliOls
- OlsOMA
- OmaOme
- OmeOmo
- OMPOnd
- One
- OneOne
- OneOni
- OniOno
- OnoOom
- OomOpe
- OpeOpp
- OppOra
- OraOrb
- OrbOrc
- OrcOrg
- OrgOri
- OriOrk
- OrkOrp
- OrpOrr
- OrrOrv
- OrvOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOue
- OugOut
- OutOut
- OutOut
- OutOve
- OveOVR
- ovrOwl
- OwlOxx
- OxyOZR
- ozz
- 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, Jewel
- 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. 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
- oXni (French rapper Julia Maura)
- 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. Jussi
- Oxo 86 feat. Ole
- Oxon (Polish rapper)
- Oxtoby (Neil Oxtoby)
- Oxxxymiron (Russian rapper)
