- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOCE
- OceOct
- octOdd
- OddOdi
- OdiOf
- OfOff
- OffOh
- ohohG
- OhgOji
- OJMokh
- OKIOla
- OlOld
- OldOli
- OliOli
- OliOls
- OlsOMB
- OMBOmn
- OmnOnb
- OncOne
- OneOne
- OneOni
- ONJont
- OntOos
- OotOph
- OphOR
- OrOrb
- OrbOrc
- OrcORE
- OreOri
- OriOrl
- OrlOrp
- OrpOrt
- OrtOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOvi
- OviOwl
- OwlOye
- Ozy
- OzzOZZ
- Or Bleu
- Or Bleu featuring Lary Kidd
- Or du Commun, L’ (Belgian hiphop)
- Or du Commun, L’ feat. Elvis, Roméo
- Or Noir (French TV show)
- Or, Rotem
- Or, The Whale
- OR3O (fandom music producer/vocalist)
- ORA (classical choir)
- Ora Mate
- 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 Sisters (Band from Paris, France)
- Oracles (indie psychedelic rock band from Berlin)
- Oraculum (US Progressive Metal/Shred band)
- Orakle
- Oral
- Oral Bee
- ORAL CIGARETTES, THE
- Oral Habit
- Oral Tunerz starring Whigfield
- 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 Bicycle
- Orange Blossom
- Orange Blue (Hamburg)
- Orange Blue (Italian dance project)
- Orange Can
- Orange Caramel (After School sub‐unit)
- Orange Goblin
- 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, Adrian
- Orangefarm (New Zealand indie rock)
- Oranger
- Oranges (post-hardcore/math rock band)
- Oranges & Lemons
- Oranges Band, The
- Orangestar
- Orangez
- Oranj Symphonette
- Oranssi Pazuzu (Finnish black metal)
- Orantes, Francisco (Christian music singer-songwriter)
- Orantes, Marilú (Christian music artist)
- Oranžās Brīvdienas
- Orator (Bangladesh | Death/Thrash Metal)
- Oratorio
- Oratorio The World God Only Knows
- Oratory
- Orax (Italian)
- Orazbayeva, Aisha (Kazakh violinist)
- ORB (Australian prog rock)
- Orb (Lithuanian stoner)
- Orb, The
- Orb, The & Perry, Lee “Scratch”
- Orb, The feat. Perry, Lee “Scratch”
- Orb, The feat. Perry, Lee “Scratch”
- Orba Squara
- Orbach, Jerry
- Orbach, Jerry, Lansbury, Angela and Chorus
- Orbakaitė, Kristina
- Orbans, The