- Orchestral Manoeuvres In the Dark
- Orchester & Chor Eric Frantzen
- Orchid
- Orchestra
- Orchid Ablaze
- Orchester der Vereinigten Bühnen Wien
- Orchestra Alec Medina
- Orchestra Bagutti
- Orchestra Harlow
- Orcustus
- Orcas
- Orchestre National de Barbès
- Orchestra Baobab
- Orchester Ambros Seelos
- Orca
- Orchester Werner Tauber
- Orchestra Of Angels
- Orchestra JB
- Orchestra Morphine