- Oska
- Oskar Aichinger
- Oskar Böhme
- Oskar Böhme
- Oskar & Bruno
- Oskar Cartaya
- Oskar Eustis
- Oskar Frederik Lindberg
- Oskar Fredriks Kammarkor
- Oskar Kamionsky
- Oskar Karlweis
- Oskar Linnros
- Oskar Merikanto
- Oskar Merkanto
- Oskar Moerth
- Oskar Morawetz
- Oskar Offermann
- Oskar Redwitz
- Oskar Rieding
- Oskar Riedl
- Oskar Rózsa
- Oskar Sala
- Oskar Saville
- Oskar Sima
- Oskar Werner
- Oskar Werner
- Oskar Werner
- Oskar Werner
- Oskar Werner
- Oskar Werner
- Oskar Werner
- Oskar Zenkert
- Oskaras
- Oskars Stroks
- Oskay And Domhnaill
- Oskay & O'Domhnail
- Osker
- Oski
- Oskido
- Oskord
- Oskorri
- Oskorri
- Oskryf
- Osland Jazz Orchestra
- Oslandailey Jazztet
- Oslo
- Oslo
- Oslo 13
- Oslo 13
- Oslo Brigade Orchestra
- Oslo Camerata
- Oslo Cathedral Choir
- Oslo Domkirkes Guttekor
- Oslo Domkor
- Oslo Ess
- Oslo Fluid
- Oslo Gospel Choir