- O
- OO
- OO
- OO
- OOak
- OakOb
- ObObl
- OblOC
- OCOce
- OCEOct
- OctOcu
- OcuOdd
- OddOdi
- OdiODZ
- OeOff
- OffOff
- Offogo
- ogoOh
- OhOHN
- OhnOje
- OjeOKA
- OKAOku
- OkuOla
- OlaOld
- OldOle
- OleOli
- OliOli
- OliOls
- Ols
- OmaOme
- OmeOmn
- OmnOna
- OnaOne
- OneONE
- Oneone
- OneONI
- OniOnl
- OnlOny
- OnyOos
- OosOpe
- OpeOpp
- OprORA
- OraOrb
- OrbOrc
- OrcOrd
- OrdOrg
- OrgOri
- OriOri
- OriOrm
- OrmOrq
- OrqOrs
- OrsOru
- Osb
- OsbOse
- OseOsm
- OsmOst
- OstOth
- OthOtt
- OttOty
- OtyOur
- OurOut
- OutOut
- OutOut
- OutOve
- OveOvi
- OviOwe
- OweOxa
- OxbOZ
- Oz
- ozz
- Obè, Amir feat. Sostre, Eli
- Obed Marsh (Australian black/doom metal)
- Obedient Wives Club
- Obel, Agnes (Danish singer)
- Oben, Cahit
- Obenski, Amy
- Ober, Hermann
- Oberbaum (German/Belgian artist Lucie Rezsöhazy)
- Oberg
- Öberg, Mats
- Oberg, Uwe
- Oberhofer
- Oberhofer, Brad
- Oberle, Gregory
- Oberlin, Karen
- Oberon (space metal band from Ada, Oklahoma, USA)
- Oberon, DJ (UK techno/trance artist; Les Spalding)
- Oberpichler, Rale
- Oberritter Dóra ft. Lotfi, Begi
- Oberschlesien
- Oberst, Conor
- Oberst, Conor & Blondshell
- Oberst, Conor and Mystic Valley Band, The
- Oberti, Samuele
- Obese Turtles, The (Kimya Dawson side project)
- Obeses
- OBESØN (toronto ambient, electronic, experimental, r&b, hip_hop)
- Obey City
- Obey Cobra
- Obey Me! Boys (Obey Me! character group)
- Obey the Brave
- Obey the sun
- Obey, Ebenezer
- OBGMs, The
- Obi (UK britpop band)
- Obi Best (formerly called Colorforms)
- Obia le Chef
- Obia le Chef avec Caballero & JeanJass
- Obiat
- Obibox
- Obie Hans
- Obiedo, Ray
- Obieglo, Andreas
- Obiols Campi, Arnau (Arnau Obiols Campi)
- Obispo, Pascal
- Obispo, Pascal & Alexia Gredy
- Obispo, Pascal & Angi, Giordana
- Obispo, Pascal & Frégé, Élodie
- Obispo, Pascal & Mars, Mélissa
- Obispo, Pascal & St-Pier, Natasha
- Obispo, Pascal avec Zazie
- Obispo, Pascal duo avec Calogero
- Obispo, Pascal feat. Baby Bash
- Obispo, Pascal feat. Calogero
- Obispo, Pascal feat. Casal, Luz
- Obispo, Pascal feat. Hallyday, Johnny
- Obispo, Pascal feat. La Troupe des Dix Commandements
- Obispo, Pascal feat. N'Dour, Youssou
- Obispo, Pascal feat. N’Dour, Youssou
- Obispo, Pascal feat. Pagny, Florent
- Obispo, Pascal feat. Stoner, Sam
- Obispo, Pascal feat. Zazie
- Obispo, Pascal, Willem, Christophe, Fiori, Patrick, Alizée
- Obito
- Obits
- Obituary (US death metal band)
- Object Unto Earth
- Objekt (TJ Hertz)
- Objektif
- Objetivo Birmania
- OBK
- OBKATIEKAT
- OBLADAET (Russian rapper)
- Obladaun (Russian parody rap)
- Oblea, Mark (Filipino Artist)
- obli (US multi-instrumentalist and electronic producer)
- Obligaatiot
- Obligatorisk Tortyr
- Obliging Victims, The
- Oblio (Alt-rock trio based in Pasadena California)
- Oblique (New Wave/Electronic)
- Oblique (Bangladeshi band)
- Oblique Brown
- Obliterate (Slovak grindcore)
- Obliterate (Canadian deathcore)
- Obliterations
- Oblivia (Australian band)
- Oblivians (US garage punk trio)
- Oblivion (Chicago punk band)
- Oblivion (Blackened Technical Death Metal from the Bay Area)
