- O
- OO
- OO
- OO
- OOak
- OakOat
- OatObi
- ObiObs
- ObsOce
- OceOce
- OceOct
- OctOdd
- OddOde
- OdeODM
- OdmOer
- OerOff
- OffOff
- Offogo
- OGROh
- OhOhm
- OHMOja
- OjaOka
- OkaOkt
- OktOla
- OLAOld
- OldOle
- OleOli
- OliOli
- OliOll
- OllOLU
- OluOm
- OmOme
- OmeOmo
- OMOOna
- OOne
- OneOne
- OneOne
- oneOne
- ONFOnl
- Onl
- Oon
- OonOpe
- OpeOpi
- OpiOpu
- OpuOra
- OraOrb
- OrbOrc
- OrcOrd
- OrdOrg
- OrgOri
- OriOri
- OriOrm
- OrmOrp
- OrpOrr
- OrrOrt
- OrtOsb
- OsbOsc
- OscOsl
- Osl
- OstOte
- OTFOtr
- OTROtt
- OttOur
- ourOut
- OutOut
- OutOut
- OutOVE
- OVEove
- OveOVS
- OvtOWI
- OwiOxl
- OxlOzc
- OzcOzu
- Ozuozz
- Olly Junglist (Electronic/D&B producer, features on Rhythmic Remedies)
- Olly Molly
- Olly, Mango, Angelina & JVLI
- Olma (ambient guitar)
- Olma feat. Grigoni, Mike
- Olmeca
- Olmerová, Eva
- Ölmez, Orhan
- Olmos
- Olmos & Ellis, Richard
- Olmos & OZNE
- Olmos feat. Reynolds, Kyle
- Olmos, Walter
- OLMS
- Olms, The
- Olney, David
- OLNL (korean rapper)
- Olodum
- Olof Wallberg
- Olomana
- Olomidé, Koffi
- Olomidé, Koffi & Quartier Latin
- Olomidé, Koffi feat. Gawlo, Coumba
- Olotila
- Olovson
- Olrait's, The
- Olrog, Ulf Peder
- Ols (one-woman project from Poland)
- Olsein
- Olsen & Fu
- Olsen Brothers
- Olsen, Alek
- Olsen, Allan (Danish folkrock musician)
- Olsen, Angel
- Olsen, Angel & Simpson, Sturgill
- Olsen, Dorothy
- 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.
- Olsey, Sepp
- Olson (German rapper)
- Olson, Alix
- Olson, Carla
- Olson, Carla & Clark, Gene
- Olson, Carla & Taylor, Mick
- Olson, Danny
- Olson, Danny & Frank, David
- Olson, Danny & Linney
- Olson, Danny & Luma
- Olson, Danny & yetep feat. Easae
- Olson, Evan
- Olson, Hans
- Olson, Jill
- Olson, Jules (singer-songwriter)
- 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, Mika
- Olson, Olivia (American actress, singer-songwriter)
- Olsson (key track “Hold On”)
- Olsson feat. Mapei
- Olsson Ingemar
- 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
- Olsthoorn, Alice (Dutch Hyperpop artist)
- Olszakumpel
- Olta, No Land & İsimsiz Orkestra
- OLTAS (Oldskool doom- en deathmetal uut 'e Walden!)
- Oltmans, Tinne (Belgian actress & singer)
- Olu Maintain
- OLUGBEMI, JOSEPH (UK Artist)
