- O
- OO
- OO
- OO
- OOak
- OakOat
- OatObi
- ObiObs
- ObsOce
- OceOch
- OchOct
- OctOdd
- OddOde
- ODEOdo
- OdoOf
- OfOFF
- OffOfi
- OfiOgr
- OgrOH
- OhOhr
- OhtOjo
- Ojooka
- OkaOku
- OkuOlc
- OldOld
- OldOle
- OleOli
- OliOli
- OliOlr
- OlsOM
- omOMB
- OMBOmi
- Omion
- OnOnd
- ONDOne
- OneOne
- OneOne
- ONEOni
- Onn
- ONOOob
- OobOpa
- OpaOpe
- OpeOpp
- OppOra
- OraOra
- OraOrc
- OrcOrc
- OrcOre
- OreOri
- OriOri
- OriOrl
- OrlOro
- OroOrq
- OrqOrt
- OrtOs
- OsOsc
- OscOsi
- OskOss
- Oss
- Otl
- OtnOtt
- OttOue
- OueOus
- OusOut
- OutOut
- OutOuv
- OuvOve
- OveOvi
- OviOwe
- OweOxa
- OxbOys
- OysOzo
- Ozoozz
- Orlando, Courtney (singer-songwriter, FKA J.R.)
- Orlando, Johnny (Canadian singer-songwriter, vlogger and actor)
- Orlando, Johnny (reggae artist)
- Orlando, Johnny & BENEE
- Orlando, Johnny & DVBBS
- Orlando, Johnny & kenzie
- Orlando, Mike
- Orlando, Ramón
- Orlando, Rui
- Orlando, Tom (artist from Ottawa, Ontario, Canada)
- Orlando, Tony
- Orlando, Tony & Dawn (1970s pop group)
- Orlando, Tony & Dawn Featuring Orlando, Tony
- Orlando, Tony And Orlando, Tony & Dawn
- Orlane (French zouk singer)
- Orlane (Belgian singer)
- Orleans
- Orleans, Joan
- Orlek
- Orleya
- Orlić, Tiho (Croatian pop-rock music singer-songwriter, music producer)
- Orlik (czech Oi!)
- Orliński, Jakub Józef, Biel, Michal
- Orlinski, Richard & Simons, Eva
- Orloff, Peter (schlager-singer, songwriter, producer, actor)
- Orloge Simard
- Orlons, The (US R&B group)
- Orlova, Alina
- Orlowski, Kris
- Orlowsky, David (German clarinetist)
- Orlowsky, David, Trio
- Orly (cuarteto group)
- ORM (epic/melodic black metal band from Denmark)
- Ormabol (Norwegian folk/black metal band)
- Ormai
- Ormandy, Eugene (conductor)
- Ormandy, Eugene & Philadelphia Orchestra, The
- Ormåsen, Gaute
- Ormaz (French rapper)
- Orme, Le
- Ormiston
- Ormonde
- ORMUS (Spanish DJ)
- ormus (Trance/Progressive producer)
- Orna
- Ornament (Afghan Whigs and Marcy Mays)
- Ornamento y Delito
- Ornaments (Italian band)
- Ornate
- Ornate feat. Jack the Underdog
- Ornatos Violeta
- Orne
- Ornelas, Raúl
- Ornella Napolitani
- Ornella Thiry
- Ornery (Folk punk band from Vancouver, BC, Canada)
- Ornette (French‐Italian singer‐songwriter multi‐instrumentalist)
- Ornithology (Performance name of Shaan Chhadva)
- Ornob
- ORO (Uruguay)
- Oro Negro (Grupo de Ecuador)
- Oro Sólido
- Oro Swimming Hour
- Orobians, The
- Orochen (Post-rock / folk from Sweden)
- Orochi (Brazilian rapper)
- Orodruin (Traditional Doom Metal band from U.S.A.)
- Orofino, Richard
- Orok, Shayne
- Orok, Shayne & Orok, Ali
- Öröm
- Oropesa, Omar (Christian music singer)
- Ôros Kaù (Belgian black metal)
- Orouni
- Oroza, Bobby
- Oroza, Bobby & El Michels Affair
- Oroza, Bobby feat. Cold Diamond & Mink
- Orozco Barrientos
- Orozco, Alejandra
- Orozco, Antonio (Spanish singer-songwriter)
- Orozco, Antonio & Fonsi, Luis
- Orozco, Antonio & Juanes
- Orozco, Antonio & KAROL G
- Orozco, Antonio & Martín, Dani
- Orozco, Antonio & Pereyra, Luciano
- Orozco, Antonio & Raphael
- Orozco, Antonio & Soledad
- Orozco, Antonio & Yatra, Sebastián
- Orozco, Antonio feat. Fonsi, Luis
- Orozco, Antonio feat. Malú
