- O
- oO
- OO
- OO
- OOak
- OakObe
- ObeObl
- Obl
- Oce
- OceOct
- OctOda
- Odaode
- odeOdi
- OdiOer
- OesOff
- OffOff
- OffOgr
- OgrOh
- OhOi
- OiOjo
- OjoOke
- OkeOl
- OlOld
- OldOld
- OldOli
- OliOli
- OliOll
- OllOlv
- OlvOma
- OmaOmi
- OmiOmu
- OmuOnc
- One
- OneOne
- OneOne
- OneONL
- ONLOno
- OnoOok
- OokOpe
- OpeOph
- OphOpu
- Opuora
- ORAOrb
- orbOrc
- OrcOre
- OreOri
- OriOri
- OriOrl
- OrlOro
- OroOrq
- OrqOrt
- OrtOsa
- OSAOsc
- OscOsk
- OskOst
- OstOte
- OteOtr
- OtrOtt
- Ottour
- OurOut
- OutOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOwl
- OwlOxy
- Oxy
- Ozmozz
- Otero, David & Fernández, Dani
- Otero, David & Guerra, Ana
- Otero, David & Mäbu
- Otero, David & Soto, Marta
- Otero, David & Taburete
- Otero, David feat. Torres, Iván
- Otero, David, Nil Moliner & Arnau Griso
- Otero, Manolo
- 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 Guys, The (US hip-hop duo)
- 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 Tribe, The
- 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)
- 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 Zola
- Otis, Johnny
- Otis, Johnny, Show, The
- Otis, Johnny, The, Rhythm & Blues Caravan
- Otis, Jon (American drummer, producer, bandleader)
- Otis, Shuggie
- Otkroveniya dozhdya
- Otlo
- Otnicka (Electronic Musician)
- OTNOSE. & plagueinside
- Oto
- oto (Pascal Hubert, Farid Dahalb & François Rousseau)
- Otoboke Beaver
- Otoda, Masanori
- Otokogumi
- Otomo, Yoshihide
- Otonose, Kanade (ReGLOSS)
- OTPendia
- OTR (Downtempo electronic producer)
- OTR & Au/Ra
- OTR & Devault
- OTR & Jones
- OTR & Panama
- OTR & Rory Wynne
- OTR & Shallou
- OTR & Vancouver Sleep Clinic
- OTR feat. Shallou
- Otra Cara de la Nada, La
- Otra Fe, La
