- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeOBL
- OblObs
- Obsoce
- OceOce
- oceOct
- OctOda
- OdbOdd
- OddOde
- OdeODU
- ODUOf
- OfOff
- OFFOfi
- Ofiogo
- OGROh
- OhOhi
- OhiOIL
- OilOk
- OkOke
- OkeOl
- OlOla
- OlaOld
- OldOl
- OlOlg
- OlgOli
- OliOli
- OliOls
- OlsOMA
- OmaOma
- OmaOme
- OmeOmn
- OmnOn
- OnOne
- ONEOne
- OneOne
- OneOne
- OneONJ
- OnkOnn
- ONOOny
- OnyOos
- OosOpe
- OpOpi
- OpiOpu
- OpuOra
- Oraorb
- OrbOrc
- OrcOrc
- OrcOre
- OreOrh
- OrhOri
- ORIOrk
- OrkOrn
- OrnOrq
- OrqOrr
- OrrOrt
- OrtOsa
- OsaOsc
- OscOsk
- OskOss
- OssOT
- OtaOth
- OthOtt
- OttOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOv
- OvOve
- OveOve
- OveOwe
- OweOwl
- OwlOxl
- Oxl
- OzaOzo
- OzoOzz
- Orkestar Business Class (Finnish band)
- Orkesterpop
- OrKestra (incl. Ex-Members of ELO)
- Orkhan Efendi
- ORKID (Swedish singer)
- Orkidea (Finnish DJ / producer Tapio Hakanen)
- Orkiestra Dni Naszych
- Orkiestra św. Mikołaja (The Saint Nicholas Orchestra)
- Orkiestra Symfoniczna Filharmonii Narodowej, Rowicki, Witold
- Orkiestra Uliczna Z Chmielnej
- Orko (UK rock band)
- Orkrist
- Orlandi, Violet
- Orlandi, Violet & Skar
- Orlandi, Violet feat. Dan Vasc
- Orlandi, Violet feat. First to Eleven & Halocene
- Orlandi, Violet feat. Young, Jonathan
- Orlandi, Violet, Babic, Lauren, Halocene & First to Eleven
- Orlando (Belgian tech house singer)
- Orlando (Dutch band by singer-songwriter Tessa Douwstra)
- Orlando (Italian Italodance project from S.A.I.F.A.M. Group)
- Orlando (UK singer songwriter)
- Orlando Julius (Nigerian saxophonist, singer, bandleader, and songwriter)
- Orlando Marin & His Orchestra
- Orlando Philharmonic Orchestra
- Orlando Pops Orchestra
- Orlando Pops Orchestra & Lane, Andrew
- Orlando Pops Orchestra, Lane, Andrew
- Orlando Riva Sound
- Orlando Vera Cruz
- Orlando, Bobby (US record producer, indie record label owner, songwriter & musician)
- 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, Spirit of
- 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
- 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
- Ormsby Brothers, The
- ORMUS (Spanish DJ)
- ormus (Trance/Progressive producer)
- Ormuz
- Orna
- Ornament (Australian ambient duo)
- 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)
