- Old Man Markley
- Old Man Pie
- Old Man River
- Old Man Shattered
- Old Mans Child
- Old River Folks
- Old School Abbey
- Old Southern Moonshine Revival
- Old Table
- Oldcodex
- Oldelaf
- Ole Anders Halen
- Ole Blando
- Ole Borud
- Ole Ivars
- Ole Kristiansen
- Ole Ole
- Ole Paus
- Oleander
- Oleg Nejlik
- Olenka And The Autumn Lovers
- Olesen-olesen
- Oleta Adams
- Olga Román
- Olga Syahputra
- Olga Tañon
- Oli Brown
- Oli Brown Band
- Oli P
- Olimpo Cárdenas
- Olin And The Moon
- Oliver
- Oliver Adams
- Oliver Boyd
- Oliver Céleste
- Oliver Dragojevic
- Oliver Hart
- Oliver Heldens
- Oliver Holden
- Oliver James
- Oliver Lffler
- Oliver Mandic
- Oliver Mtukudzi
- Oliver Nelson
- Oliver Ochoa
- Oliver Onions
- Oliver Pigott
- Oliver Pinder
- Oliver The Musical
- Oliver Trolley