- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- OceOCT
- OctOda
- OdaODE
- ODEODU
- ODUOfe
- OfeOG
- OGOh
- OhOhl
- OhmOjo
- Ojookg
- okhOla
- OlaOld
- OldOle
- OleOli
- OliOlm
- OLMOma
- OmaOme
- OmeOmo
- OMPOnd
- OndOne
- Oneone
- oneONJ
- OnkOns
- Ons
- OosOpe
- OpeOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOri
- OriOro
- OroOrq
- OrqOrv
- OrvOsb
- OsbOsk
- OskOst
- Oth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOva
- OvaOve
- OveOwe
- OweOxf
- Oxf
- OZZ
- OLMS
- Olms, The
- Olney, David
- OLNL (korean rapper)
- Olodum
- Olof Wallberg
- Olomana
- Olomidé, Koffi
- Olomidé, Koffi & Quartier Latin
- Olomidé, Koffi feat. Gawlo, Coumba
- Olotila
- Olrait's, The
- Ols (one-woman project from Poland)
- Olsen & Fu (Two polish rappers)
- Olsen Brothers
- Olsen, Allan (Danish folkrock musician)
- Olsen, Angel
- Olsen, Angel & Simpson, Sturgill
- Olsén, Daniel
- Olsen, Egil
- Olsen, Egil S.
- Olsen, George, and His Music
- Olsen, Jon Flemming
- Olsen, Jørgen
- Olsen, Kristina
- Olsen, Lenay
- Olsen, Lynn (Dutch artist)
- Olsen, Troy
- Olsenbanden jr.
- Olson (German rapper)
- Olson, Alix
- Olson, Carla
- Olson, Carla & Clark, Gene
- Olson, Carla & Taylor, Mick
- Olson, Danny
- Olson, Evan
- Olson, Luke
- Olson, Mark (US alt. country musician, Jayhawks etc)
- Olson, Mark & Creekdippers, The
- Olson, Mark & Louris, Gary
- Olson, Mark & The Creekdippers
- Olson, Mark and the Original Harmony Ridge Creekdippers
- Olson, Michael (US christian singer, songwriter & drummer)
- Olson, Olivia (American actress, singer-songwriter)
- Olsson (key track “Hold On”)
- Olsson feat. Mapei
- Olsson, Albin
- Olsson, Björn
- Olsson, Felicia
- Olsson, Kurt
- Olsson, Leif "Loket"
- Olsson, Linnea (singer‐songwriter and cellist)
- Olsson, Nigel
- Olsson, P.J.
- Olsson, Viktor (Swedish singer/songwriter)
- Olstead, Renee
- Olstead, Renee feat. Botti, Chris
- OLTAS (Oldskool doom- en deathmetal uut 'e Walden!)
- Oltmans, Tinne (Belgian actress & singer)
- Olu Maintain
- OLUGBEMI, JOSEPH (UK Artist)
- Olusola, Kevin
- Oluwajesse
- Ölveti Blues Band
- Olvidados, Los (Skate punk band from San Jose, CA)
- Olvidados, Los (Bolivian band)
- Olvido (melodic/gothic metal)
- Oly (American singer-songwriter, Lianna Sylvan)
- Oly (@Southwrld_9)
- Oly. (from Poland, on Nextpop label)
- Olympe (French singer of The Voice 2)
- Olympia (Melbourne singer)
- Olympians (Norwich Crunch Pop band)
- Olympic (Czech big beat band)
- Olympic Ayres
- Olympic Swimmers
- Olympics, The (US doo wop group)
- Olympiou, Despoina (Despoina Olympiou)
- Olympique
- Olympus Mons
- Olzon, Anette
- Om (US stoner/doom metal band)
- Om (Lost at Last)
- OM ("Singer" "Sober" "Reezons")
- om la luna
- Om Unit
- OMA (Hip-hop instrumentals)
- Oma 206
- Omagh Community Youth Choir
- Omaha Bitch
