- Olivia Trummer Trio -- Olivier Cirendini
- Olivier Cohen -- Olivier Paquotte
- Olivier Peters Sextet -- Olle Persson
- Olle Rinaird -- Ollie J
- Ollie Jackson -- Olney
- Olney Air -- Olufemi Alexander
- Olufemi Alexander -- Olympus Mons
- Olympx -- Omar Abreu
- Omar Acosta Trio -- Omar Ghallab
- Omar Giammarco -- Omar & Rafi
- Omar Rane -- Omara Portuondo
- Omari -- Omega Cix
- Omega Crom -- Omega Lithium