- Otis Lee Crenshaw
- Otis Redding
- Otis Rush
- Otis Taylor
- Otium
- Otomania
- Otomo Yoshihide
- Otra Nota
- Otro Mambo
- Ott
- Ott Lepland
- Ottawan
- Ottmar Liebert
- Otto
- Otto Brandenburg
- Otto De La Rocha
- Otto Knows
- Otto Ohm
- Otto Serge
- Otto Waalkes
- Otx
- Otyg
- Ou Est Le Swimming Pool
- Ought
- Ounce Of Self
- Our Hearts Hero
- Our Hollow Our Home
- Our Innocence Lost
- Our Lady Peace
- Our Last Night
- Our Reflections
- Our Summer Silhouette
- Our Time Down Here
- Ourania
- Ouroboros
- Ours
- Ourselves The Elves
- Ouseppachan
- Out Hud
- Out Of Eden
- Out Of Enemies
- Out Of Hiding
- Out Of Misery
- Out Of My Hair
- Out Of Sight
- Out Of Yesteryear
- Out Of Your Mouth
- Outasight
- Outbreak
- Outbreakband