- O
- OO
- OO
- OOak
- OakObe
- ObeObr
- OBSOce
- OceOch
- OchOct
- OctOde
- OdeOdo
- OdoOf
- OfOff
- OffOgr
- OgrOha
- Oiz
- OizOka
- OKAOkw
- OkYOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOm
- OmOmi
- OMIOn
- OnOne
- OneOne
- OneONE
- oneOnl
- OnlOnu
- OnuOoy
- OozOpe
- OpgOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOri
- OriOrn
- OrnOrq
- OrqOrt
- OrtOsb
- OsbOsh
- OshOss
- OssOte
- OteOtt
- Ott
- Out
- OutOut
- OutOut
- OutOve
- OveOvi
- OviOwl
- OwlOXO
- OxoOzo
- OzoOZZ
- Opus Pro
- OQuadro
- Oquendo, Manny y Libre
- Oquendo, Manny's Libre
- Oques Grasses
- Oques Grasses & Doble
- Oques Grasses & Payés, Rita
- Oques Grasses & Santa Salut
- Oques Grasses & Stay Homas
- OQueStrada
- OR (rap duo)
- Or Bleu
- Or Bleu featuring Lary Kidd
- Or du Commun, L’ (Belgian hiphop)
- Or du Commun, L’ feat. Elvis, Roméo
- Or du Commun, L’ feat. Elvis, Roméo, Caballero, Zwangere Guy
- Or du Commun, L’ feat. Lous and the Yakuza
- Or Noir (French TV show)
- Or, Rotem
- Or, The Whale
- OR3O (fandom music producer/vocalist)
- ORA (classical choir)
- ORA (Danish duo)
- Ora the Molecule
- Ora, Rita
- Ora, Rita feat. Brown, Chris
- Ora, Rita feat. Cardi B, Rexha, Bebe & Charli xcx
- Ora, Rita feat. Cole, J.
- Ora, Rita feat. Fatboy Slim
- Ora, Rita feat. Michaels, Julia
- Ora, Rita feat. Tempah, Tinie
- Ora, Rita feat. will.i.am
- Ora, Rita x Guetta, David x Imanbek
- Ora, Rita x Guetta, David x Imanbek feat. Gunna
- Ora, Rita x Imanbek feat. Khea
- Oracle (Indonesian Thrash Metal band)
- Oracle Hands (German Sludge/Post-Metal band)
- Oracle Sisters (Band from Paris, France)
- Oracles (indie psychedelic rock band from Berlin)
- Oraculum (US Progressive Metal/Shred band)
- Orage, L (from Italy)
- Oral
- Oral Bee
- ORAL CIGARETTES, THE
- Oral Habit
- Oram, Tara
- Orang-Utan
- Orange (California punk band)
- Orange (German world music/percussion band)
- Orange (Vietnamese singer)
- Orange 9mm
- Orange and Lemons (Filipino pop rock band)
- Orange Blossom
- Orange Blue (German pop duo)
- Orange Blue (Italian dance project)
- Orange Cake Mix
- Orange Caramel (After School sub‐unit)
- Orange Goblin (English heavy metal band)
- Orange Goodness, The (Groove-fueled indie rock)
- Orange Grove
- Orange Juice (Scottish post-punk band from 70s-80s)
- Orange Lights, The
- Orange Ocean (Orange Ocean)
- Orange Orange
- Orange Park
- Orange Peels, The
- orange pekoe (real‐world J‐pop duo)
- ORANGE RANGE
- Orange Sector
- Orange Sky (A rock band from the Caribbean Island of Trinidad and Tobago)
- Orange Skyline (Dutch rock band)
- Orange Street (Rock Band from India)
- Orange-I (Belgian 1990/2000s band)
- Orange, Adrian
- Orangefarm (New Zealand indie rock)
- Oranger
- Oranges (post-hardcore/math rock band)
- Oranges & Lemons
- Oranges Band, The
- Orangestar
- Orangestar feat. IA
- Orangez
- Orango
- Oranj Symphonette
- Oranssi Pazuzu (Finnish black metal)
- Orantes, Francisco (Christian music singer-songwriter)
- Orantes, Francisco feat. Orantes, Azucena
- Orantes, Marilú (Christian music artist)
- Oranžās Brīvdienas
- Oratnitza
