- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeObl
- oblObs
- ObsOce
- OceOch
- OchOCT
- OctODC
- ODCOdd
- OddOde
- OdeODU
- ODUof
- ofOFF
- OffOFK
- OfMOgr
- OgrOh
- OhOhi
- OhiOim
- OimOK
- OKOke
- OkeOl
- OlOl
- OlaOld
- OldOle
- OleOlg
- OlgOli
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- OliOls
- OlsOma
- OmaOma
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- OmeOmn
- OmnOn
- OnOne
- OneOne
- OneOne
- OneOne
- OneOnk
- OnkOno
- OnoOny
- OnyOos
- OosOpe
- OpeOPL
- OPMOpu
- OpuOra
- OraOrb
- OrbOrc
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- OrdOre
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- OrqOrr
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- OttOur
- OurOut
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- OutOut
- OutOv
- OvOve
- OveOVE
- OVEOwe
- OweOwl
- OwlOxm
- OxmOza
- OzaOzo
- OzoOzz
- 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, Otis, Johnny, Show, The
- Otis, Johnny, Show, The
- Otis, Johnny, The, Rhythm & Blues Caravan
- Otis, Jon (American drummer, producer, bandleader)
- Otis, Jon (British pop singer from the 1980s)
- Otis, Shuggie
- Otkroveniya dozhdya
- Otlo
- Otnicka (Electronic Musician)
- OTNOSE. & plagueinside
- Otoboke Beaver
- Otocol (breakcore/idm, f.k.a. Chipper)
- Otoda, Masanori
- Otogi Banashi
- OTOGIBANASHI'S, The
- Otoha (Japanese singer-songwriter and guitarist)
- Otokogumi
- Otomo, Yoshihide
- Otonose, Kanade (ReGLOSS)
- OTP
- 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
- Otra puse & Stafecka, Antra
- Otrabanda
- Otracami (project of Camila Ortiz)
- Otro
- Otro Grupo, El
- Otro Mambo
- Otro Nivel
- Otro Polo, El
- Otro Polo, El & Rawayana
- Otro Yo, El (Argentine rock band)
- Otroci socializma
- OTROGEN (Polish heavy metal)
- Otropic t(H)ree
- Otros Aires
- Otros Colores
- Ots, Georg
- Otsochodzi (polish MC)
- Otsochodzi feat. Hemingway, Taco
- Otsochodzi feat. Rosalie.
- Otsochodzi feat. Szopeen
- Otsochodzi feat. Włodi
- Otsochodzi feat. Young Igi
- Otsuka, Ai
- Ott (UK producer/psychedelic dub multi-instrumentalist)
- OTT (late '90s Irish boyband)
- Ott, Alex
- Ott, Alice Sara (pianist)
- Ott, Carey
- Ott, Christine
- Ott, Jeff
- Ott, Kerstin (German (Berlin) Singer)
- Ott, Kerstin & Fischer, Helene
- Ott, Kerstin & Zucker, Ben
- Ott, Kerstin, Berg, Andrea
- Ott, Kerstin, Carpendale, Howard
- Ott, Kerstin, Fischer, Helene
- Ott, Quest (Nigerian music producer and artist)
- otta
- OTTA-Orchestra
- Ottava Dimensione
