O
- O Rappa
- O-Town
- O-Zone
- O.A.R.
- O.C.
- O.N.A.
- O.S.T.R
- Oasis
- Obie Trice
- Obituary
- OBK
- Oblivion
- Obsidian Voice
- Ocean Blue
- Ocean Colour Scene
- Odds
- Oddział Zamknięty
- Offside
- Oingo Boingo
- Ole Van Dansk
- Oleander
- Oleta Adams
- Oli P.
- Olive
- Olivia Newton John
- Omd
- One Hit Wonder
- One Track Mind
- One-t
- Onyx
- Oomph
- Opeth
- OPM
- Opus
- Orange Blue
- Orishas
- Orphaned Land
- Os Travessos
- OT.TO
- Otis Redding
- Otto Waalkes
- Our Lady Peace
- Ours
- Out Of Eden
- Outkast
- Outlandish
- Over The Rhine
- Overcast
- Overground
- Overkill
- Owal / Emcedwa
- Owen Temple
- Oxymoron
- Ozzy Osbourne