- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeOBL
- OblObs
- Obsoce
- OceOce
- oceOct
- OctOda
- OdbOdd
- OddOde
- OdeODU
- ODUOf
- OfOff
- OFFOfi
- Ofiogo
- OGROh
- OhOhi
- OhiOIL
- OilOk
- OkOke
- OkeOl
- OlOla
- OlaOld
- OldOl
- OlOlg
- OlgOli
- OliOli
- OliOls
- OlsOMA
- OmaOma
- OmaOme
- OmeOmn
- OmnOn
- OnOne
- ONEOne
- OneOne
- OneOne
- OneONJ
- OnkOnn
- ONOOny
- OnyOos
- OosOpe
- OpOpi
- OpiOpu
- OpuOra
- Oraorb
- OrbOrc
- OrcOrc
- OrcOre
- OreOrh
- OrhOri
- ORIOrk
- OrkOrn
- OrnOrq
- OrqOrr
- OrrOrt
- OrtOsa
- OsaOsc
- OscOsk
- OskOss
- OssOT
- OtaOth
- OthOtt
- OttOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOv
- OvOve
- OveOve
- OveOwe
- OweOwl
- OwlOxl
- Oxl
- OzaOzo
- OzoOzz
- Ov Ruin
- Ov Ruin & Brojob
- Ov Ruin & Needler, Casey
- Ov Sulfur
- Ov Sulfur feat. Jones, Howard
- Ov Sulfur feat. Medina, Kyle & Schoolcraft, Lindsay
- Ov Sulfur feat. Taylor Barber
- Ov Sulfur feat. Terrible, Alex
- OV3RDRIVE & Tsumyoki
- OV7
- OV7 & JNS
- OV7 & Kabah
- Oval Opus
- Oval Portrait, The
- Ovall
- Ovall feat. Sakai, Yū
- Ovalle, Iván
- Ovalle, Iván & Villazón, Iván
- OVAN (Korean rapper)
- OVAN & VINXEN
- Ovations, The (1960s–70s R&B group)
- Ovations, The (US vocal group from New Jersey)
- OvDeth
- OVE (indie‐pop band from Hamburg, Germany)
- Ovejas Negras, Las
- Ovenden, Julian
- Ovenden, Julian & McPhee, Katharine
- Ovens
- OVEOUS feat. Blank, Tasha
- Oveous Maximus
- Over and Out
- OVER ARM THROW
- Over Distortion (Indonesian dirty punk rock band from Sleman, Yogyakarta)
- Over Easy (American DJ/Producer Duo)
- Over Easy & Mehta, Ashley
- Over Easy & MiNDTRiX
- Over Easy, MiNDTRiX & Mehta, Ashley
- Over It
- Over My Dead Body
- Over My Dead Name
- Over October (Filipino pop/alternative rock band)
- 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 Time (Croatia instrumental prog)
- Over Under (Band)
- Over, Disco’s feat. Cooke, Jennifer
- 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
- Overbey, Charlie
- Overboard
- Overboard (a cappella group)
- Overcast (US metalcore band)
- Overcharge (trance/acid duo Marc Steinmeier & Olaf Cramer)
- OverClocked Plaid Muffins, The
- Overcoats
- Overcome (American christian hardcore)
- Overdawn
- Overdose (Brazilian metal band)
- Overdose (NYC Hard Rock Band)
- Overdose TV
- OverDoz.
- Overdrive (Swedish metal band)
- Overdrive (NWOBHM band)
- OverDrive Division
- Overdrive Orchestra
- Overdrivers
- Overdrives, The (punk rock from Nazareth, Pennsylvania, USA)
- Overflash
- Overflow (Croatian punk band)
- Overflow (South Carolina Christian pop/rock band)
- Overfuzz
- Overground (German boygroup)
- OVERGROUND ACOUSTIC UNDERGROUND
- OVERGROW
- Overgrown (United kingdom)
- Overgrown Throne (Chapel Hill, NC punk)
- Overhand, Sam
