- O.A.R.
- Ophelie Winter
- Olodum
- Orcaorca (オルカオルカ)
- Omnia
- 欧阳青
- 원웨이 (Oneway)
- 欧阳雪
- Origa (Ольга Витальевна Яковлева)
- 오왼 오바도즈 (Owen Ovadoz)
- Oh Land
- Oceanlab
- Oxide
- Obfusc
- Ornella Vanoni
- OT乐团
- Oh Sunshine
- Obando
- OTHANKQ (오땡큐)
- offonoff (오프온오프)
- Oliver Shanti
- 欧阳浩瀚
- Organic Stereo
- 欧霖
- otetsu
- Obie Trice
- 欧阳袁源
- OG Maco
- Ono
- Oskar Schuster
- Om Voices
- Olivia Millerschin
- OnLine
- Otilia
- Olwik
- Olivia Holt
- Overflow
- One Less Reason
- Orla Fallon
- Otto A. Totland
- Outback Carol Singers
- Oval
- On Ramp
- Old Dirty Bastard
- 欧阳曹亮
- Orlando Silva
- Organ
- Owsley
- Oui 3
- Overhead Champion (オーバーヘッド・チャンピオン)
- Omid
- 欧阳德勋
- Ocean Wisdom
- On&On (온앤온)
- Orchestra Under The Direction Of Morris Stoloff
- Orlando B
- Os Monarcas
- Oh No Ono
- Oscar Rocchi
- Oliver Schories
