- Outerlimitz
- Octant
- Osborne
- Overhaul In Damnation
- Outasight
- Olé Olé
- Okular
- Ob6sions
- Open Autopsy
- Oliver Scheffner
- Okuno Hachisuka
- Open Air Stereo
- OBJEKT/URIAN
- Ogden Nash
- Om Voices
- Otto Knows
- Operator Please
- Orquesta América
- Onion Creek Crawdaddies
- One For Jude
- Oberhofer
- Odd Logic
- Orphan
- Off Broadway
- Overseas
- 欧阳飞莺
- Olla Vogala
- Olov Johansson
- Of Former Fame
- Ozzie Kotani
- Onward, Soldiers
- Osman Arabi
- Obscura Monotonia Animae
- OxT
- One Inch Giant
- Old Time
- Origin of Darkness
- Oscar Charles
- Other Day
- 欧几
- Operations
- Ornella de Santis
- Original Sins
- OneHeadedMan
- Old Pike
- Oscar del Cerro
- OllieLi
- Owensie
- Osvaldo Berlingieri
- Obsidian Butterfly
- Owsey
- Old Friends
- Orquesta Casino de la Playa
- Olof Hammer
- Otros Aires
- 欧阳嘉奇
- Octex
- Oliver Nelson
- Orphonic Orchestra
- Outhouse
- Original Indiana Five
- Ouse
- Oscar Sher
- One Eyed Crew
- 欧俪雯
- Ordo Rosarius Equilibrio
- Octavia Rose
- Orgel Sound J-Pop
- Olemus
- Oscar Peterson Trio
- Olodum
- Onie Wheeler
- Oscar Holter
- Ossian
- Otis Redding
- O3ohn
- On Fillmore
- Ollie & Jerry
- Ogün Dalka
- Ole Schmidt
- O Emperor
- Ottoman Empire
- Orifeel...ing
- Olaf Bar
- Otto Klemperer
- Orchestra
- OH MY GIRL BANHANA
- Orsus
- Olivia Holt
- October Tide
