- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOCE
- OceOct
- octOdd
- OddOdi
- OdiOf
- OfOff
- OffOh
- ohohG
- OhgOji
- OJMokh
- OKIOla
- OlOld
- OldOli
- OliOli
- OliOls
- OlsOMB
- OMBOmn
- OmnOnb
- OncOne
- OneOne
- OneOni
- ONJont
- OntOos
- OotOph
- OphOR
- OrOrb
- OrbOrc
- OrcORE
- OreOri
- OriOrl
- OrlOrp
- OrpOrt
- OrtOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOvi
- OviOwl
- OwlOye
- Ozy
- OzzOZZ
- OJM (Italian stoner rock band)
- Ojo Rojo (German stoner rock)
- Ojo, Daniel (Gospel Singer)
- Ojos (French duo)
- Ojos de Brujo
- Ojos de Brujo feat. Bebe
- Ojos de Brujo feat. Capossela, Vinicio
- Ojos de Brujo feat. Drexler, Jorge
- Ojos de Brujo feat. González Rivero, Roldán
- Ojos de Brujo feat. Juno Reactor
- Ojos de Brujo feat. Sawhney, Nitin
- Ojos de Brujo feat. Troba Kung-Fú, La
- Ojos Locos
- OK (french indie band)
- OK Band (Czech new wave band)
- OK Button (Group from Scotland)
- OK Cool (Chicago based indie duo)
- ok danke tschüss
- OK Factor, The (Cello and violin duo of Olivia Diercks and Karla Colahan)
- OK Go
- Ok Goodnight (Progressive rock band based in Boston, MA)
- Ok Goodnight feat. Hull, Elizabeth
- OK K.O.! Let’s Be Heroes
- OK KID
- OK KID feat. Banjo, Olli
- OK KID feat. Gerard
- OK KID feat. Mädness
- OK KID feat. Megaloh
- OK KID feat. Spilker, Frank
- Ok Moon
- OK PANDA (Belgian electro pop/rock band)
- OK Pirámides
- OK Social Club, The
- OK Sweetheart
- Ok, Ju Hyun
- Ok, Taecyeon
- 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
- 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