- O
- OO
- OO
- OO
- OOAF
- OAFOak
- OakObe
- ObeObo
- OboOca
- OcaOce
- OceOct
- OctOct
- OCTOdd
- OddODE
- ODEOdu
- Oduof
- OfOff
- OffOfM
- OfnOgu
- OOh
- OhOho
- OHoOje
- OjeOKA
- OKAOkt
- OkuOla
- OlaOld
- OldOle
- OleOli
- OliOli
- OliOll
- OllOls
- OlsOma
- OmaOme
- OmeOmm
- OmnOn
- OnOnd
- OndOne
- OneOne
- OneOne
- OneOni
- OniOnl
- onlOny
- OnyOos
- OotOpe
- OpeOpp
- OppOr
- OrOra
- oraOrb
- OrbOrc
- OrcOrd
- OrdOrg
- OrgOri
- OriOri
- OriOrl
- OrlOrp
- OrpOrq
- OrqOrt
- OrtOsa
- OsaOsc
- OscOsk
- OskOss
- OssOta
- Oti
- OtiOtt
- Ott
- Our
- OurOut
- OutOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OWEOwl
- OwlOxm
- oXnOzc
- OzcOzu
- Ozuozz
- Oaktree (Belgian electronic music producer)
- Oakwite
- Oakwood
- Oakwood Station
- Oamen Samuel (Benny Zanda is the stage name for the artist, Oamen Samuel Osehoje is the official birth name.)
- Oanh, Hoàng
- Oanh, Hoàng & Trung Chỉnh
- Oar (Australia, Metal)
- Oasis (Noel & Liam Gallagher)
- Oasis (Omar-S and Shadow Ray)
- Oasis (’70s US rock band)
- Oasis 4you (Mexican Christian music group)
- Oasis Chorale
- Oasis Ministry (Christian band)
- Oasis Worship
- Oat, Senior (deep house, amapiano, gqom, afro soul)
- Oates, Jackie
- Oates, Jackie & Spiers, John
- Oates, John
- Oath (An alias of Steven Waddell, used in this Heavy Metal solo project based in Edinburgh, Scotland, UK, started in 2018.)
- Oath, Das
- Oath, The (German heavy doom metal)
- Oathbound (Progressive metalcore band from Seattle)
- Oathbreaker (Belgian post‐black metal band)
- Oathless
- Oaths, The
- Oatmello
- Oatmello & SwuM
- Oats, Case
- Oattes, Bernard
- Oatumn
- Oaty. (lo‐fi artist)
- OAU (OVERGROUND ACOUSTIC UNDERGROUND)
- OB (DnB Producer (North London))
- OB OBrien feat. Drake & Preme
- Oba Oba Samba House
- Obadiah Parker
- Obake
- Obani (Obani)
- Öbarna
- Obas, Beethova
- Obata, Minako “mooki”
- Obata, Takahiro (jazz pianist, keyboardist)
- Obata, Yukari
- OBB (Oswald Brothers Band)
- Obbie Messakh (Artist of JK Records)
- Obe 1 Kanobe (russian rapper)
- Obe Dve
- Obè, Amir
- Obè, Amir feat. PARTYNEXTDOOR
- Obè, Amir feat. Sostre, Eli
- Obed Marsh (Australian black/doom metal)
- Obedient Wives Club
- Obel, Agnes (Danish singer)
- Oben, Cahit
- Obenski, Amy
- Ober, Hermann
- Oberbaum (German/Belgian artist Lucie Rezsöhazy)
- Oberg
- Öberg, Mats
- Oberg, Uwe
- Oberhofer
- Oberhofer, Brad
- Oberkampf, Victoire
- Oberle, Gregory
- Oberlin, Karen
- Oberogo, Famous
- Oberogo, Famous & Frost, Damion
- Oberogo, Famous & Lacunza, Natalia
- Oberogo, Famous & Sango, Marta
- Oberogo, Famous & Villar, María
- Oberogo, Famous, Núñez, Miki & Sabela
- Oberogo, Famous, Núñez, Miki & Sabela
- Oberon (Greek psytrance)
- Oberon (space metal band from Ada, Oklahoma, USA)
- Oberon, DJ (UK techno/trance artist; Les Spalding)
- Oberpichler, Rale
- Oberritter Dóra ft. Lotfi, Begi
- Oberschlesien
- Oberst, Conor
- Oberst, Conor & Blondshell
- Oberst, Conor and Mystic Valley Band, The
- Oberti, Luca
- Oberti, Samuele
- Obese Turtles, The (Kimya Dawson side project)
- Obeses
- OBESØN (toronto ambient, electronic, experimental, r&b, hip_hop)
- Obey City
- Obey Me! Boys (Obey Me! character group)
- Obey the Brave
