- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- Obl
- OblObs
- ObsOce
- OceOch
- OchOct
- OctOdd
- OddOdd
- OddOde
- OdeODU
- ODUof
- OfOff
- OFFofi
- OFKOgr
- OGROh
- OhOhj
- OHKOin
- OIOOK
- OKOke
- OkfOl
- OlOla
- OlaOld
- OldOle
- OleOlh
- OlhOli
- OliOli
- OliOls
- OlsOma
- OmaOma
- OmaOme
- OmeOmn
- OmnOn
- OnOne
- OneOne
- OneOne
- Oneone
- OneOnk
- OnkOno
- OnoOny
- OnyOos
- OosOp
- OpeOpi
- OpiOpu
- OpuOra
- OraOrb
- OrbOrc
- OrcOrd
- OrdOre
- OreOrh
- OriOri
- OriOrk
- ORKOro
- OroOrq
- OrqOrr
- OrrOrt
- OrtOsa
- Osa
- OscOSK
- OskOss
- Oss
- OtaOth
- OthOtt
- OttOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOv
- OvOve
- OveOve
- OveOwe
- OweOwl
- OwlOxm
- OxmOza
- OzaOzo
- OzoOzz
- Ordeal, The (German heavy/power metal band from Hannover)
- ORDEM
- Orden Mundial
- Orden Ogan
- Orden Ogan feat. Block, Stu
- Orden Ogan feat. Diehl, Dennis
- Orden Ogan feat. Eriksson, Ylva
- Orden Ogan feat. Frank Beck & Thompson, Ross
- Orden Shiitake, La
- Ordén, Janne
- Order (Norwegian Black Metal)
- Order From Chaos
- Order of Apollyon, The
- Order of Elijah, The (Joplin, MO)
- Order of Elimination
- Order of Ennead
- Order of Israfel, The
- Order of Nine
- Order of the 12, The (group led by Richard Norris)
- Order of the Ebon Hand (Greece / Black Metal)
- Order of the Fallen
- Order of the Fly, The
- Order of Týr
- Order of Voices
- Order, The (Hard 'n' Heavy, Switzerland)
- Order89 (Parisian darkwave trio)
- Orders, The (UK indie rock, psych)
- Ordesa
- Ordge, Jimmy Arthur (Canada)
- Ordher, The
- Ordinaires, The (USA band)
- Ordinance (USA progressive death metal)
- Ordinarius
- Ordinary Boys, The
- Ordinary Elephant
- Ordinary Me, The
- Ordinary People (New Jersey)
- Ordinary Peoples
- Ordinary Surfers
- Ordinary Time
- Ordinul Negru
- Ordo Equilibrio
- Ordo Equitum Solis
- Ordo M’era Luna
- Ordo Rosarius Equilibrio
- Ordog (doom metal band from Finland)
- Ordonez, Fabian
- Ordoñez, Josete
- Ordonówna, Hanka
- Ordorika, Ruper
- Ordos (Swedish stoner/metal)
- Ordre du Chaos, L' (Projet musical franco-allemand mêlant folk-rock médiéval et metal moderne lent et syncopé.)
- Ordre du Périph, L’ (french rap group)
- Oré (French hip-hop/chanson/neo soul rapper/vocalist)
- Oreada
- Oreazon
- Orebolo (Norwalk, CT indie band)
- Orecus (Melodic Death Metal/Groove Metal from Sweden)
- oreglo (Jazz fusion, jazz-funk, london jazz, reggae, London)
- Oregon
- Oregon Bike Trails
- OREGONTRAIL
- Oreia (Brazilian rapper)
- Oreia, Hot e (Brazilian Rap Duo)
- Oreiro, Natalia
- Oreja (UK producer/DJ Paul Dolby aka Seiji)
- Oreja de Van Gogh, La
- Oreka TX (Basque band)
- Orelha, MC
- Orelipoiss
- Orellana Lucca
- Orellana, Raúl (DJ & producer)
- Orellana, Raúl feat. Brown, Jocelyn
- Orellana, Roberto
- Orelle (Italian artist Elisabetta Pasquale)
- Orelsan (French rapper)
- Orelsan & Gringe
- Orelsan & Shani, Juste
- Orelsan & Toxic Avenger, The
- Orelsan feat. Cordae
- Orelsan feat. Damso
- Orelsan feat. FIFTY FIFTY
- Orelsan feat. GIMS
- Orelsan feat. GIMS
- Orelsan feat. Gringe
- Orelsan feat. Ibeyi
- Orelsan feat. Ikuta, Lilas
- Orelsan feat. Nekfeu & Rascal, Dizzee
- Orelsan feat. Neptunes, The
- Orelsan feat. Skread
