- The Oscar Peterson Big 6 -- The Other
- The Other -- The Other Family
- The Other Famous People -- The Other Side
- The Other Side -- The Others Ran
- The Others (Rap) -- The Out_Circuit
- The Out Crowd -- The Outer Limits
- The Outer Vibe -- The Outlaws
- The Outlaws -- The Outs
- The Outside -- The Outta Controllers
- The Outta Sites -- The Overflow Band
- The Overkill Kid -- The Owens' Project
- The Owl Ensemble -- The Oxygen Ponies
- The Oxymorons -- The Pacers
- The Pachinko Fake -- The Package
- The Package -- The Pagans
- The Page Boys -- The Paint Sisters
- The Painted Birds -- The Paladins
- The Palata Singers -- The Palmtree Family
- The Palmyra Players -- The Pancakes