- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOce
- OceOct
- OctOdd
- OddOde
- OdeOef
- OehOff
- OffOgd
- OgdOh
- OhOi
- OiOk
- okOku
- OkuOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOMB
- OMBOmn
- OmnO
- OnaOne
- OneOne
- OneOng
- OngOno
- OnoOom
- OomOpe
- OpeOpt
- optOra
- OraOrc
- OrcOrd
- OrdOrh
- OrhOri
- OriOrm
- OrmOrq
- OrqOrt
- OrtOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxl
- OxlOzm
- OZMOZZ
- ok2222 (beatmaker)
- OKAAY
- Okabayashi, Kazuma (Japanese ambient / drone musician)
- Okabe (Canadian Artist)
- Okabe, Keiichi
- Okabe, Mina (Danish-Japanese singer-songwriter)
- Okada, Laryssa
- Okada, Yukiko
- Okafor, Ben
- Okakita, Ayu
- Okaly, Kyle
- Okami Sky
- Okami, Alex
- OKAMOTO’S
- Okamura, Takako
- Okamura, Yasuyuki
- OKAN (Canadian afro-cuban duo)
- Okan, Cem
- Okan, Cihan
- Okan, Tanju
- Okapi
- Okasian (Korean-American rapper & singer)
- OKAWARI, DJ
- OKAWARI, DJ feat. Amadori
- OKAWARI, DJ feat. Amanda Diva
- OKAWARI, DJ feat. Campbell, Brittany
- OKAWARI, DJ feat. ERIKO
- OKAWARI, DJ feat. Jumelles
- OKAWARI, DJ feat. Meyer, Emi
- OKAWARI, DJ feat. San, Woong
- OKAWARI, DJ feat. Styler, Emily
- OKAWARI, DJ feat. Tekitha
- Okay (Marty Anderson's California indie rock project)
- Okay Alright
- Okay Kaya (Kaya Wilkins)
- Okay Mann
- okayceci
- okaywill (will)
- Okazaki, Ritsuko
- Okazaki, Taiiku
- OKDAL
- Okean Elzy
- Okee Dokee Brothers, The
- Okeefe, Josh
- Okehazama, Alisa
- Okehazama, Alisa
- Okello Max
- Oker
- Okereke, Kele
- Okereke, Kele feat. Alexander, Olly
- Okereke, Kele feat. Bailey Rae, Corinne
- Oketo
- Okey Dokey (2010s psych soul)
- Okey, Ixie (Ugandan pop artist)
- okgiorgio (Giorgio Pesenti)
- okho
- OKI (Polish MC)
- Okills
- Okills feat. Guevara, Laura.
- Okilly Dokilly
- Okin (Indonesian musician)
- Okin, Earl
- Okinawa Lifestyle
- Okis (french rap)
- Okkervil River
- Okktli
- Okkultist
- Oklahoma Kid, The
- Oklahoma Kid, The & Consvmer
- Oklahoma Uprising
- Oklou
- Oklou feat. Casey MQ
- Oklou feat. Pomme & Harle, Danny L
- Oklou feat. Zero Castigo
- Okmalumkoolkat
- OKO TYGRA
- Okomfour Kwadee (Kwadee)
- Okon, James
- Okou
- Okoumé
- Okra Playground
- Oksanen, Ritva
- Okta Logue
- Oktet (Oktet Praha)
- Oktobar 1864
- Oktober, Ingeborg
- Oktoberklub
- Oktoplut
- Oktor
- Oku, Hanako
