- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- OceOCT
- OctOda
- OdaODE
- ODEODU
- ODUOfe
- OfeOG
- OGOh
- OhOhl
- OhmOjo
- Ojookg
- okhOla
- OlaOld
- OldOle
- OleOli
- OliOlm
- OLMOma
- OmaOme
- OmeOmo
- OMPOnd
- OndOne
- Oneone
- oneONJ
- OnkOns
- Ons
- OosOpe
- OpeOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOri
- OriOro
- OroOrq
- OrqOrv
- OrvOsb
- OsbOsk
- OskOst
- Oth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOva
- OvaOve
- OveOwe
- OweOxf
- Oxf
- OZZ
- 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-Leash (Akron, OH Pop-punk/Easycore (formerly Detention))
- Off, Fake (hardcore punk)
- OFF! (US hardcore punk band)
- Offa Rex (Olivia Chaney and The Decemberists)
- OFFAIAH
- Offbeat (UK rapper)
- OFFBEAT COWBOY
- Offenbach (Quebec group)
- Offenbach, Jacques (German-French composer, cellist and impresario)
- Offended
- Offenders, The (Italian ska band)
- Offendum, Omar
- Offer (Lil Data + Harry Burgess of Adult Jazz)
- Offer Nissim feat. Maya (Israeli house duo)
- Offering, The (Boston metal band)
- Offerman, Catie
- Offerman, Jim
- Office (Chicago indie rock band)
- Office Culture
- Office Hours
- Officer Down
- Officer X
- Officer, Jordan
- Officer, The (Freestyle)
- Official (Australian born contemporary R&B artist)
- Official Hec (New York Rapper)
- Official HIGE DANdism
- Official Secrets Act
- officina della camomilla, L'
- officina della camomilla, L' feat. stato sociale, Lo
- Officina meccanica
- Officina Zoè
- Officium Triste (Dutch death/doom metal band)
- Offishall, Kardinal feat. T‐Pain
- OFFL1NX
- Offlaga Disco Pax
- Offline, The
- OFFMi (Russian rapper)
- offonoff (Korean duo)
- Offor, Blessing
- Offseason, The
- Offset (Atlanta rapper, member of Migos)
- Offset & Cardi B
- Offset & JID
- Offset & JID
- Offset & Metro Boomin
- Offset feat. Cardi B
- Offset feat. Don Toliver
- Offset feat. Future
- Offset feat. Scott, Travis
- Offside Reidars
- Offspring (UK punk band)
- Offspring (pop)
- Offspring (70s prog rock)
- Offspring, The (American punk)
- Offspring, The feat. Redman
- OffTopic (Hungarian pop punk)
- Oficina Blues
- Oficina G3 (Braziliam Christian Band)
- Oficio (Post-Punk / Indie Rock artist from Santiago, Chile)
- OFK (We are OFK)
- OfMan, Lewis
- Ofner, Dominik (Austrian Singer, Band, Folk, Pop)
- Ofnus (atmospheric black metal band from Wales)
- Oforia (Real Name Ofer Dikovsky; Goa- / psy-trance project from Israel.)
- Ofrin (Israeli singer based in Berlin, Germany and Tel Aviv, Israel)
- oftn
- OG Bobby Billions
- OG BraX (Swiss rapper)
- OG Buda (Russian rapper)
