• O' Day, Anita
• O'Byrne, Patrick
• O'Conor, John
• O'Day, Anita
• O'Day, Anita & Giuffre, Jimmy
• Obradovic, Lada Project
• Odetta
• Oh Susanna
• Orbison, Roy
• Os Gatos
• Osborne, Anders
• Otis, Johnny
• Ottman, John
• Otto Normal
• Owens, Dean
• Ozawa, Seiji / Boston Symphony Orchestra