- O
- OO
- OO
- OOak
- OakOb
- ObeOBO
- ObrOce
- OceOch
- Och
- OctODE
- OdeODO
- odoOf
- OfOff
- OffOgr
- OgrOh
- OhaOis
- OisOka
- OkaOku
- OkuOlc
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOma
- OmaOme
- OMFOn
- OnOne
- OneOne
- ONEOne
- oneOnk
- OnkOnT
- OntOor
- OorOpe
- OpeOpu
- OpuOra
- OraOrc
- OrcOrd
- OrdOrh
- OrhOri
- OriOrl
- OrlOrq
- OrqOrt
- OrtOsa
- OsaOsc
- OscOsm
- Osn
- Otr
- OtrOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxi
- OxiOze
- ozz
- Oistrakh, David Fiodorovich (violinist)
- Oistrakh, David Fiodorovich, Yampolsky, Vladimir
- Oizo, Mr. (Quentin Dupieux)
- Oizo, Mr. & Phra
- Oizo, Mr. feat. Boys Noize
- Oizo, Mr. feat. Charli xcx
- Oizo, Mr. feat. Manson, Marilyn
- Oizo, Mr. feat. Mocky
- Oizo, Mr. feat. Peaches
- Oizo, Mr. feat. Phra
- Oizo, Mr. feat. Siriusmo
- Oizo, Mr. feat. Skrillex
- Oizo, Mr. feat. Uffie
- Oizo, Mr., Phra & Frah Quintale
- OJ da Juiceman
- OJ da Juiceman & Gorilla Zoe
- OJ da Juiceman & Gucci Mane
- OJ da Juiceman feat. Gucci Mane
- Ojaghloo, Mobin
- Ojala, Aleksi
- Ojanen, Ville
- Ojatula, Celeste
- Ojay (Alternative Rock)
- Ojba Rasta
- Ojeda Fabián (Paraguayan Christian music singer)
- Ojeda, Eddie
- Ojeda, Javier
- Ojeda, Jesús y sus Parientes (Regional Mexican)
- Ojeda, Tino
- Ojerime (R&B singer)
- Ojete Calor
- Ojete Calor feat. Calorettes, The
- Ojima, Yoshio (composer and music producer)
- Ojinaga, La Fiera De
- 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 Band (Serbian pop-folk 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)
- Oka Wi Ortega
- 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 (Arizona post-punk)
- OKAMOTO’S
- Okamura, Takako
- Okamura, Yasuyuki
- OKAN (Canadian afro-cuban duo)
- Okan, Cem
