- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- Oceoch
- OchOct
- OctOde
- OdeOdo
- OdoOfa
- OfaOff
- OffO
- OOha
- OhaOiz
- OizOKA
- OKAOl
- OlOld
- OldOle
- OleOli
- OliOli
- OliOls
- OlsOma
- OmaOml
- OmmOn
- OnOne
- OneOne
- OneOne
- OneOnl
- OnlOny
- OnyOpe
- OpeOpi
- OpiOra
- OraOrb
- OrbOrc
- OrcOre
- OreOri
- OriOrk
- OrkOro
- OrpOrr
- OrrOrw
- OrwOsb
- OsbOsk
- OskOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOva
- OvaOve
- OveOwe
- OweOxb
- Oxe
- OzeOZZ
- 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
- 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)
- Oxygen (British trance duo)
- Oxygen Destroyer (Seattle Death/Thrash Metal)
- Oxygen feat. Britton, Andrea
- Oxygen Thief
- Oxymoron (German punk rock band)
- Oxymorrons
- Oxys, The (Austin, TX rock band)
- Oy (Swiss/German electro duo Joy Frempong & Marcel Blatti)
- Oya & Bora
- Oyama (band from Iceland)
- Oyatan
- Oyelakin, Tosin
- Oyelana, Tunji
- Oyesono
- Öykü & Berk
- Oyls
- Oyster Murders, The
- Oysterband
- Oysterband feat. Tabor, June & Chumbawamba
- Oysterband featuring Celtas Cortos
- Oysterhead
- OZ (visual kei)
- Oz (Finnish/Swedish metal band)
- Oz One (ska)
- Ozaki, Amii
- Ozaki, Hiroya
- Ozaki, Kiyohiko
- Ozaki, Yutaka
- Özalp, Nil
- Ozark Henry (Belgian musician Piet Goddaer)
- Ozark Henry feat. Accoe, Lize
- Ozark Henry feat. Bettens, Sam
- Ozark Henry feat. Elisa
- Ozark Mountain Daredevils, The
- Ozawa, Seiji (conductor and composer)
- Ozbay, John
- Özbeğen, Ferdi
- Özbey, Merve
- Ozbi
- Ozbi, Duru, Gülce
- Ozbilen, Zeynep
- Ozborne, Etienne & Royal, Benny
- Özcan, Onur Can
- Ozcan, Ummet (Dutch DJ and record producer)
- Ozcan, Ummet, Lownoise, Charly & Mental Theo & Orange INC
- Özçelik, Jülide
- Özdemir, Ercüneyt
- Özdemir, Selahattin
- Özdenses, Semahat
- Özdil, Özlem
