- OKAMOTO’S
- Okamura, Takako
- Okamura, Yasuyuki
- 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. Epps, Stacy
- 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)
- okho
- OKI (polish MC)
- Okills
- Okills feat. Guevara, Laura.
- Okilly Dokilly
- Okin, Earl
- Okinawa Lifestyle
- Okino, Shuntaro
- Okis (french rap)
- Okkervil River
- Okktli
- Okkultist
- Oklahoma Kid, The
- Oklahoma Uprising
- Oklou
- Oklou feat. Casey MQ
- Oklou feat. Pomme & Harle, Danny L
- Oklou feat. Zero Castigo
- Okmalumkoolkat
- OKO TYGRA
- Okon, James
- Okou
- Okoumé
- Okra Playground
- Oksanen, Ritva
- Okta Logue
- Oktet (Oktet Praha)
- Oktobar 1864
- Oktober, Ingeborg
- Oktoberklub
- Oktoplut
- Oktor
- Oku, Hanako
- Okuda, Tamio
- Okudzhava, Bulat
- Okui, Masami
- Okulus
- Okumoto, Ryo
- Okumoto. Ryo
- Okupnik, Tatiana
- Okuş, Seha
- Okuto
- Okvsho (Georg & Christoph Kiss)
- Okwizi
- OkYm Riim
- Ol Zico
- Ol' 55
- Ol' Skool (R&B Group)
- Ol' Skool feat. Xscape & Sweat, Keith
