- O
- OO
- OO
- OO
- OOaf
- OAFOaK
- OakOBE
- ObeObn
- OBO
- Oce
- OceOCS
- OCTOct
- OctOdd
- OddODE
- ODEOdo
- OdoOf
- OfOff
- OFFOfi
- OfiOgr
- OgrOh
- OhOHN
- OhnOiz
- OJOKA
- OkaOkm
- OKOOla
- OlaOld
- OldOld
- OldOle
- OleOli
- OliOli
- OLIOls
- OlsOma
- OmaOma
- Omaomg
- omgOmo
- OmoO
- OnaOne
- OneOne
- OneOne
- ONE
- OneOnl
- OnlONT
- ontOom
- OomOpe
- OpeOph
- OphOpt
- OpuOra
- OraOrb
- OrbOrc
- OrcOrc
- OrcOre
- OreOri
- OriOri
- OriOrk
- OrkOro
- OroOrq
- OrqOrs
- OrsOru
- OruOsb
- OsbOsc
- OscOSM
- OsmOst
- OstOte
- oteOtr
- OtrOtt
- OttOui
- OuiOus
- OusOut
- OutOut
- OutOut
- OutOve
- OveOVE
- OveOwe
- oweOwn
- OwnOxy
- Oxy
- OZZ
- ozzozz
- otetsu
- otetsu feat. GUMI
- Otey, Lisa
- OTF Boonie Moe
- OTF Boonie Moe, Rob49 & Only the Family
- Otgoo
- OTH
- Otha (Othalie Husøy)
- Othalan (Polish Folk Metal)
- Othello (Théo Celino)
- Other Colors, The
- Other Ego
- Other End, The (Norwegian duo)
- Other Favorites, The
- Other Guys, The (Scottish A Cappella Group)
- Other Half, The (’60s San Francisco psychedelic rock band)
- Other Lives (US indie rock band)
- Other Men
- Other Minds (Alternative Rock Band)
- Other Ones, The (Australian-German band, hit single "Holiday")
- Other Other Brothers, The
- Other Stars, The (Indie Rock)
- Other Two, The
- Other Voices (Italian goth)
- Other Years, The
- Other-ed
- Other, The (horrorpunk band from Germany)
- Other, The (US punk rock band)
- Otherkin
- OTHERLiiNE (George Fitzgerald & Lil Silva)
- Others by No One
- Others, The (UK dubstep producer)
- Others, The (2000s UK rock band)
- Others, The (60's US garage rock band from Kingston, RI)
- Others, The feat. Geoff Smith
- Otherside, The (80s Dutch beat group)
- Otherside, The (US psychedelic band)
- Otherview
- Otherwise (US hard rock band)
- Otherwise feat. Costello, Ashley
- Otherwish (Progressive house musician)
- Othila (neofolk / ambient group)
- Othmane Bali
- Othmer, Julia
- Othuum (german doom metal band)
- Otierre
- Otik (dance music)
- Otile Brown
- Otilia (Otilia Bruma)
- Otira (French DJ & producer Mederic Martin)
- Otis (southern blues rock from Sulphur Well, KY)
- Otis (Alternative rock/post-grunge band from Phoenix, Arizona.)
- Otis (Mozambican saxophone player)
- Otis Stacks
- OTIS VCR
- Otis Waygood Blues Band
- Otis Zola
- Otis, Johnny
- Otis, Johnny & His Orchestra
- Otis, Johnny, Show, The
- Otis, Johnny, The, Rhythm & Blues Caravan
- Otis, Jon (British pop singer from the 1980s)
- Otis, Shuggie
- Otkroveniya dozhdya
- Otlo
- Otnicka (Electronic Musician)
- OTNOSE. & plagueinside
- Oto
- oto (Pascal Hubert, Farid Dahalb & François Rousseau)
- Otoboke Beaver
- Otocol (breakcore/idm, f.k.a. Chipper)
- Otoda, Masanori
- Otoha (Japanese singer-songwriter and guitarist)
- Otokogumi
- Otomo, Yoshihide
- Otonose, Kanade (ReGLOSS)
- OTPendia
- OTR (Downtempo electronic producer)
- OTR & Au/Ra
- OTR & Devault
- OTR & Jones
- OTR & Panama
- OTR & Shallou
- OTR & Vancouver Sleep Clinic
- OTR & WYNNE
- OTR feat. Shallou
- Otra Cara de la Nada, La
- Otra Fe, La
- Otra puse
- Otrabanda
