- Oa Gunnarsson
- O.A. Hughes
- Oa Party Duo
- Oacid
- O.A.D.
- OAG
- Oahspe
- Oahu
- Oahu Band
- Òai Star
- Oak
- Oak
- Oak
- O.A.K.
- O.A.K.
- Oak and Bone
- Oak and Gorski
- Oak Apple Day Plus the Deadly Pair
- Oak, Ash & Thorn
- Oak Cliff
- Oak Cliff Assassin
- Oak Cliff Hardhittaz
- Oak Cliff T-Bone
- Oak Cliff T-Bone (Walker)
- Oak is Keeping
- Oak Lonetree
- Oak Oak
- Oak Ridge Quartet
- Oak Street Blues
- Oakalla
- Oakbottom
- Oakcee
- Oakdale Carrière
- Oakdale Carrière
- Oakeater
- Oakenfold
- Oakes
- Oaklahoma
- Oakland
- Oakland Citadel Band
- Oakland City Hustla's
- Oakland Faders
- Oakland Stroke
- Oakland Symphony Orchestra
- Oakland Youth Orchestra
- OaklandSymphonyOrchestra
- Oakley
- Oakraida
- Oaks Family
- Oaksenham
- OakSquad
- Oaktown Irawo
- Oaktown Jazz Workshop
- Oaktown's 3.5.7
- Oaktown's 357
- Oakull And The Snug
- Oakwood College USM