- Otis & Toxic
- Otis Turner
- Otis Turner
- Otis Waygood
- Otis Webster
- Otis White
- Otis Williams
- Otis Williams New Group
- Otis Williams & The Charms
- Otis Williams & the Midnight Cowboys
- O.T.I.S.
- Otis'Candy'Finch
- OTiZ
- Otizmo
- OTK
- O.T.L.
- OTM
- OTM (A.K.A. Rakoon)
- O.T.M. Records
- Otmane
- Otmar Binder Trio
- Otmar Macha
- Otmar Suitner
- Otmaro Ruiz
- OTMC
- Otmer Horn
- OTMOP 10-tet
- OTN
- oto
- Oto Borges
- Oto Gelb
- Oto Kapanadze
- Oto Plasma
- Oto Seres
- Otoe
- 音川英二
- Otok Bima Sidarta
- Otokar Kraus
- Otolithen
- Otoma Yoshide
- Otomatik Mustafa
- Otome Bancho
- Otometsubaki
- Otomeza
- Otomi Indians
- 大友康平
- 大友良英
- Otomo Yoshihide's New Jazz Orchestra
- Otomo Yoshihide's New Jazz Quintet