- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- OceOCS
- OCSOda
- OdaODE
- ODEODU
- ODUOfe
- OfeOfr
- oftOh
- OhOhj
- OHKOji
- OJMOke
- OkeOla
- OlaOld
- OldOle
- OleOli
- OliOll
- OllOm
- OmOme
- OmeOmn
- OmnOnc
- One
- OneOne
- OneOni
- ONIOno
- OnoOon
- OonOpe
- OpeOpt
- Ora
- OraOrc
- OrcOrd
- OrdOrg
- OrhOri
- OriOrm
- OrmOrq
- OrqOrt
- OrtOsb
- OsbOsh
- OshOss
- OssOTF
- OtgOtt
- OttOue
- OueOut
- OutOut
- OutOut
- OutOve
- OveOwe
- OweOwn
- OwsOza
- OzaOZZ
- Outwild
- Outwork
- Outwork feat. Gee, Mr.
- Outworld (American Progressive Metal Band)
- Ouu
- Ouu & Estoni Kohver
- Ouviña, Dante
- Ouvindo
- Ouvrard, Gaston (fils)
- Ouzo Bazooka
- Ov Hell
- Ov Lustra
- Ov Moros
- Ov Sulfur
- Ov Sulfur feat. Jones, Howard
- Ov Sulfur feat. Medina, Kyle & Schoolcraft, Lindsay
- Ov Sulfur feat. Taylor Barber
- Ov Sulfur feat. Terrible, Alex
- OV7
- Oval Opus
- Ovall
- Ovalle, Iván
- OVAN (Korean rapper)
- Ovations, The (US vocal group from New Jersey)
- OVCOCO
- OvDeth
- OVE (indie‐pop band from Hamburg, Germany)
- Ovejas Negras, Las
- Ovejas Negras, Las feat. Ñengo Flow
- Ovenden, Julian & McPhee, Katharine
- Ovens
- OVER ARM THROW
- Over Easy (American DJ/Producer Duo)
- Over It
- Over My Dead Body
- Over My Dead Name
- Over October (Filipino pop/alternative rock band)
- Over The Bridge
- Over the Garden Wall (Animated TV Show)
- Over the Moon (French pop duo)
- Over the Ocean (from New York, USA)
- Over the Rhine
- Over the Wall (Glasgow, Scotland)
- Over, Lary
- Over, Lary & Darell
- Over, Lary & Ñejo
- Over, Lary, Amenazzy & Farruko
- Overall, Kassa
- Overall, Kassa feat. Brown, Danny & Wiki
- Overall, Kassa feat. Croker, Theo
- Overall, Kassa feat. Hakim, Nick & Croker, Theo
- Overall, Kassa feat. Hoard, J.
- Overall, Kassa feat. Iyer, Vijay
- Overall, Kassa feat. Lil B, Shabazz Palaces & Francis and the Lights
- Overall, Kassa feat. Mvula, Laura & Francis and the Lights
- Overboard
- Overboard (a cappella group)
- Overcast (US metalcore band)
- Overcoats
- Overcome (American christian hardcore)
- Overdawn
- Overdose (Brazilian metal band)
- Overdose TV
- OverDoz.
- Overdream (metal/rock)
- Overdrive (Swedish metal band)
- Overdrive (NWOBHM band)
- OverDrive Division
- Overdrive Orchestra
- Overdrivers
- Overflash
- Overflow (Croatian punk band)
- Overflow (South Carolina Christian pop/rock band)
- Overground (German boygroup)
- OVERGROUND ACOUSTIC UNDERGROUND
- Overgrown Throne (Chapel Hill, NC punk)
- Overhand, Sam
- Overhead (French band)
- Overhead (Finnish progressive rock band)
- Overkill (US thrash metal band fronted by Bobby “Blitz” Ellsworth)
- Overlake
- Overland (band featuring Steve Overland)
- Overland, Steve
- Overlanders, The
- Overload (Swiss thrash metal band)
- Overlord (Chilean melodic thrash/death metal)
- Overlorde
- Overlords, The (Danish Synth-pop / EBM / electro / techno / goa trance project)
- Overman, Charlie
- Overmars (French metal band)
