- Osoma/The Northside Taliban
- Oson
- Osong
- Osorezan
- OsoRich
- Osota
- O.S.P
- Osprey
- Osric
- O.S.S.
- Oss Emellan
- Ossan
- Ossatura
- Ossi Duri
- Ossi Runne
- Ossian
- Ossian Dox
- Ossie
- Ossie and the Upsetters
- Ossie Davis
- Ossie Dellimore
- Ossie Gad
- Ossie Hibbert
- Ossie Scott
- Ossining
- Ossip Gabrilovich
- Ossip Gabrilowitsch
- Ossipov Orchestra of Folk Instruments
- Ossipov Russian Folk Instruments Orchestra Soloist
- Ossman-Dudley Trio
- Osso
- Osso Exotico
- Osso Vaidoso
- Osssy
- Ossy Oneal
- Ossy Pardeller
- Ossy Renardi
- Ossy Renardy
- Ost
- O.S.T
- OST
- OST
- Ost & Kjeks
- Ost & Kjex
- Ost Trieb
- Ostad Elahi
- Ostara
- Ostbahn-Kurti
- Ostbahn Kurti
- Ostbahn Kurti & Die Chefpartie
- Ostblokk
- Östen med Resten
- Osten Mikal Ore
- Östen Warnerbring
- Oster Project
- Österreichisch-Ungarische Philharmonie
- Osterreichischen Rundfunks Chor
- Osterreichischen Rundfunks Orchester
- Österreichischer Rundfunk
- Österreichisches Sinfonie Orchester
- Ostgard & Allen
- Ostia
- Ostikada
- Ostinato
- OstinAuto
- Ostkreutz
- Ostkurve
- O.S.T.R.
- Ostracized
- Ostralab
- Ostravská Band
- Ostrich Farm
- Ostrich von Nipple
- Ostro
- Östro 430
- Ostroborhnia
- Ostrobothnian Chamber Orchestra
- Ostrogoth
- Ostronomy
- Ostroshinsky
- Ostrowski