- O
- OO
- OO
- OO
- OOaf
- OAFOaK
- OakOBE
- ObeObn
- OBO
- Oce
- OceOCS
- OCTOct
- OctOdd
- OddODE
- ODEOdo
- OdoOf
- OfOff
- OffOff
- OfiOgr
- Ogroh
- OhOHN
- OHNOiz
- OizOka
- OKAOkl
- OklOla
- OlaOld
- OldOld
- OldOle
- OleOli
- OliOli
- OliOls
- OlsOm
- OmOma
- OmaOMG
- OMGOmo
- OmoOna
- OnaOne
- OneONE
- ONEOne
- ONEOne
- OneOnl
- OnlOns
- OnsOom
- OomOpe
- OpeOpg
- OpgOpt
- OptOra
- OraOrb
- OrbOrc
- OrcOrc
- orcOre
- OreOrh
- OrhOri
- ORIOrk
- ORKOro
- OroOrq
- OrqOrs
- OrsOrt
- OrtOsb
- OsbOsc
- OscOsl
- OslOst
- Ote
- OteOTR
- OTROtt
- OttOug
- OugOus
- OusOut
- OutOut
- OutOut
- OutOve
- OveOve
- OVEOwe
- OweOwl
- Owl
- Oxx
- Ozz
- Ozzozz
- Oral Bee (Norwegian rapper)
- Oral Bee & Da Playboy Foundation
- Oral Bee & Kholebeatz
- ORAL CIGARETTES, THE
- Oral Tunerz starring Whigfield
- Oral-B (hardcore)
- Oram, Tara
- Orang-Utan
- Orange (California punk band)
- Orange (Dutch trance duo Martijn Cornelissen & Marcel Kaper)
- Orange (German world music/percussion band)
- Orange (Vietnamese singer)
- Orange 9mm
- Orange Alabaster Mushroom, The
- Orange and Lemons (Filipino pop rock band)
- Orange Animal
- Orange Bicycle
- Orange Blossom
- Orange Blossom (group of voice actresses for Koe de Oshigoto, acting as the characters)
- Orange Blue (German pop duo)
- Orange Blue (Italian dance project)
- Orange Cake Mix
- Orange Caramel (After School sub‐unit)
- Orange Dog Club (Indie Garage Rock project led by Tim Turner)
- orange flavored cigarettes
- Orange Goblin (English heavy metal band)
- Orange Goodness, The (Groove-fueled indie rock)
- Orange Grove
- Orange Guava Passion (Soul/funk pop band based in Providence, Rhode Island.)
- Orange Island
- Orange Juice (Scottish post-punk band from 70s-80s)
- Orange Lights, The
- Orange Lounge
- Orange Ocean (Orange Ocean)
- Orange Orange
- Orange Park
- Orange Peels, The
- orange pekoe (real‐world J‐pop duo)
- Orange Port
- ORANGE RANGE
- ORANGE RANGE feat. GOD MAKING
- Orange Sector
- Orange Sector & DSTRTD SGNL
- 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 Then Blue Featuring Adams, George
- Orange Yeti
- Orange-I (Belgian 1990/2000s band)
- Orange, Adrian
- orange, i.am. & disco, fredo
- Orangefarm (New Zealand indie rock)
- OrangeG
- Oranger
- Oranges (post-hardcore/math rock band)
- Oranges & Lemons
- Oranges Band, The
- Orangestar
- Orangestar feat. IA
- Orangez
- Orangutan Juice
- Orangutang (Orangutang)
- Oranj Symphonette
- Oranje (Calgary-based emo and math rock band.)
- Oranssi Pazuzu (Finnish black metal)
- Orantes, Azucena (Christian music artist)
- Orantes, Francisco (Christian music singer-songwriter)
- Orantes, Francisco feat. Orantes, Azucena
- Orantes, Marilú (Christian music artist)
- Oranžās Brīvdienas
- Oratnitza
- 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 Featuring Perry, Lee “Scratch”
- Orba Squara
- Orbach, Jerry
- Orbach, Jerry, Lansbury, Angela and Chorus
- Orbakaitė, Kristina
- Orbans, The
- ORBI
- Orbion
