- Omnibus
- Omnibus Chamber Winds
- Omnibus Wind Ensemble
- Omnicide
- Omnicron
- Omniglobe
- Omnikrom
- Omnikrom
- Omnimi
- Omnimotion
- Omnio Trio
- Omnipoetics of Deviance
- Omnipus
- Omniscience
- Omniscient
- Omnisoul
- Omnitechnomatrix
- Omnitron
- Omnium
- Omnium Band
- Omnium Gatherum
- Omniverse
- Omnivoid
- Omnivore
- Omnivore
- Omnivore
- Omnizide
- Omnoius
- Omnos
- Omo
- O.M.O.
- Omo Gadabadze
- Omo Jesu
- Omocha S
- Omogo Reloaded
- Omogo & the Res Q Ranjazz
- Omoide Hatoba