- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOce
- OceOct
- OctOdd
- OddOde
- OdeOef
- OehOff
- OffOgd
- OgdOh
- OhOi
- OiOk
- okOku
- OkuOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOMB
- OMBOmn
- OmnO
- OnaOne
- OneOne
- OneOng
- OngOno
- OnoOom
- OomOpe
- OpeOpt
- optOra
- OraOrc
- OrcOrd
- OrdOrh
- OrhOri
- OriOrm
- OrmOrq
- OrqOrt
- OrtOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxl
- OxlOzm
- OZMOZZ
- Oehl
- Oeley
- Oerding, Johannes
- Oerding, Johannes & Müller, Ina
- Oerding, Johannes & Sebastian Krenz
- Oertli, Danny
- Oesch, Melanie & Fischer, Helene
- Oesch's die Dritten
- OesteSanto
- of all living things
- Of All Things
- Of All We Cherish
- Of Allies
- Of Blackest Oceans (New Zealand metalcore)
- Of Blessings and Burdens (Amherst, MA post-hardcore band)
- Of Colours (Modern Metal band from Frankfurt/Main, Germany)
- Of Deities and Dust (Doom metal from Dallas, TX)
- Of Feather and Bone (American hardcore punk/death metal band)
- Of Gentlemen & Cowards
- Of Good Nature
- Of Gray
- Of Ice (American thrash metal band)
- Of Limbo
- Of Machines
- Of Mice & Men
- Of Monsters and Men
- of Montreal
- of Montreal feat. Monáe, Janelle
- of Montreal feat. Solange
- of persephone (siren-rock band)
- Of Roofs, Genes and Stolen Meanings
- Of Spire & Throne
- Of the Land
- Of the Son
- Of the Trees
- Of the Vine (US post-rock)
- Of the Wand & the Moon
- Of Truth
- Of Us Giants
- of Verona (LA indie rock/electropop group)
- Of Virtue
- Of Virtue feat. Wolfe, Kalie
- Of Vizions
- Of Water
- Of Wolves
- Ofard
- Ofarim, Esther
- Ofarim, Gil
- Ofb1t
- Ofdrykkja
- Ofege
- Ofelia (Iga Krefft)
- Ofelia K
- Ofenbach (French DJ duo)
- Ofenbach & FAST BOY
- Ofenbach & Gray, Sam
- Ofenbach & Henderson, Ella
- Ofenbach & Portugal. The Man
- Ofenbach & Quarterhead
- Ofenbach & Quarterhead feat. Martine, Norma Jean
- Ofenbach & Rehab
- Ofenbach & SVEA
- Ofenbach & Waterhouse, Nick
- Ofenbach feat. Ingrosso, Benjamin
- Ofenbach feat. J.Lagique
- Ofenbach vs. Waterhouse, Nick
- Ofermod (Swedish black/death metal)
- Oferta Especial
- Off (Organisation For Fun, with Sven Väth)
- Off Bloom (Anglo-Danish 3-piece)
- Off Broadway (American rock band)
- Off by One
- Off Course (Japanese folk band)
- Off Guard
- OFF KEY JUNIOR & Lovespeake
- Off Limits (Celtic/Gothic rock band from Germany)
- Off Minor
- Off Road Minivan
- Off the Beat (University of Pennsylvania Co-ed a Cappella Group)
- Off The Coast
- Off the Meds (house producers)
- Off the Record (Christian rock band)
- Off Thoughts (artist from Germany)
- Off Topic (Canadian hip hop)
- Off With Their Heads
- Off, Fake (hardcore punk)
- OFF! (US hardcore punk band)
- Offa Rex (Olivia Chaney and The Decemberists)
- OFFAIAH
- Offbeat (UK rapper)
