- Oldfield, Terry
- Oldfield, Terry & Garo, Carlos
- Oldfield, Terry & Saraswati, Soraya
- Oldham Tinkers, The
- Oldham, Andrew, Orchestra, The
- Oldham, Will
- Oldhead
- Oldians, The (ska jazz band from Barcelona, Spain)
- Oldominion
- Olds, Jerome
- Ole I'Dole
- Ole Ivars
- Olé Olé
- Oleander
- Oleg (electropop)
- Olejniczak, Janusz (pianist)
- Oleksza
- Olemus
- Olen
- Olenius, Adam
- Olenka & the Autumn Lovers
- Olestar, Los
- Olexandr Ignatov
- Olexesh (German rapper)
- Olexesh & AJÉ
- Olexesh & AK Ausserkontrolle
- Olexesh & Azzi Memo
- Olexesh & Capital Bra
- Olexesh & Katch, DJ
- Olexesh & Nimo
- Olexesh feat. AJÉ
- Olexesh feat. Blumenblatt, Marla
- Olexesh feat. Ćelo & Abdï & Chaker
- Olexesh feat. Edin
- Olexesh feat. Eko Fresh
- Olexesh feat. Hanybal
- Olexesh feat. Karate Andi
- Olexesh feat. Nimo
- Olexesh feat. Sido
- Olexesh feat. Veysel
- Olexesh feat. Yasha
- Olexesh, Casper & Yung Hurn
- Olexesh, Ćelo & Abdi
- OLF
- Olgun, Soner
- Olhava (Russia / Atmospheric/Post-Black Metal)
- Olho Seco
- OLI (UK singer- songwriter)
- Oli Barton & The Movement
- Oli Fox
- Oli P.
- Oli P. feat. Emilia
- Oli P. feat. Hilbert, Lukas
- Oli P. feat. Toorn, Jan van der
- Oligar
- Oligarkh (Russian electronic group)
- Olimareños, Los
- Olin and the Moon (LA)
- Olioso, Dolores
- Oliphant, Grassella
- Oliva (Solo band of Jon Oliva)
- Oliva Trencada
- Oliva, Carlos
- Oliva, Jon, Pain
- Olivares, Fito
- Olivares, Fito y La Pura Sabrosura
- Olivares, Pablo (Argentine Christian music singer)
- Olivarez, David
- Olivas, Alfredo (Regional Mexican singer and musician)
- Olive (UK dance/breakbeat/trip-hop group)
- Olive (Indonesian jazz singer Olivia Latuputty)
- Olive (Los Angeles based visual and audio artist)
- Olive Drab
- Olive et moi
- Oliveira, Dalva de
- Oliveira, Diego
- Oliveira, Diógenes L.
- Oliveira, Eliã (Brasil Gospel)
- Oliveira, Gloria de
- Oliveira, Jair
- Oliveira, Jairzinho
- Oliveira, Judson
- Oliveira, Paula & Moreira, Bernardo
- Oliveira, Reese
- Oliveira, Simone de (Portuguese singer and actress)
- Olivencia, Tommy
- Olivencia, Tommy y su Orquesta
- Olivensteins, Les
- Oliver (late 60s/early 70s US pop singer)
- Oliver (nu-disco electronic duo)
