- Ollano
- Ollella
- Ollero, Jay
- Ollie (Finnish singer‐songwriter Olli‐Matti Kalliosaari)
- Ollie (Canadian rapper)
- Ollie & Jerry
- Ollie Dixon
- Ollie feat. CHRIS YONGE
- Ollie feat. Rosanio, Annamarie
- Ollie feat. SONNY
- Ollie feat. Stewart, Kolton
- Ollie joe
- Ollie Joseph
- Ollie MN
- Ollie, Peppermint
- Olly Molly
- Olmeca
- Olmerová, Eva
- Ölmez, Orhan
- Olmos
- Olmos, Walter
- OLMS
- Olms, The
- Olney, David
- Olodum
- Olof Wallberg
- Olomana
- Olomidé, Koffi
- Olomidé, Koffi & Quartier Latin
- Olomidé, Koffi feat. Gawlo, Coumba
- Olotila
- Olrait's, The
- Olsen & Fu (Two polish rappers)
- Olsen Brothers
- Olsen, Allan (Danish folkrock musician)
- Olsen, Angel
- Olsen, Angel & Simpson, Sturgill
- Olsen, Egil
- Olsen, Egil S.
- Olsen, George, and His Music
- Olsen, Jon Flemming
- Olsen, Jørgen
- Olsen, Kristina
- Olsen, Lenay
- Olsen, Lynn (Dutch artist)
- Olsen, Troy
- Olsenbanden jr.
- Olson (German rapper)
- Olson, Alix
- Olson, Carla
- Olson, Carla & Taylor, Mick
- Olson, Evan
- Olson, Mark (US alt. country musician, Jayhawks etc)
- Olson, Mark & Creekdippers, The
- Olson, Mark & Louris, Gary
- Olson, Mark & The Creekdippers
- Olson, Mark and the Original Harmony Ridge Creekdippers
- Olson, Michael (US christian singer, songwriter & drummer)
- Olson, Olivia (American actress, singer-songwriter)
- Olsson (key track “Hold On”)
- Olsson feat. Mapei
- Olsson, Albin
- Olsson, Felicia
- Olsson, Kurt
- Olsson, Linnea (singer-songwriter and cellist)
- Olsson, Nigel
- Olsson, P.J.
- Olsson, Viktor (Swedish singer/songwriter)
- Olstead, Renee
- OLTAS (Oldskool doom- en deathmetal uut 'e Walden!)
- Olu Maintain
- OLUGBEMI, JOSEPH (UK Artist)
- Olusola, Kevin
- Oluwajesse
- Olvidados, Los (Skate punk band from San Jose, CA)
- Olvidados, Los (Bolivian band)
- Olvido (melodic/gothic metal)
- Oly. (from Poland, on Nextpop label)
- Olympe (French singer of The Voice 2)
- Olympia (Melbourne singer)
- Olympic (Czech big beat band)
- Olympic Ayres
- Olympic Swimmers
- Olympics, The (US doo wop group)
- Olympiou, Despoina (Despoina Olympiou)
- Olympique
- Olzon, Anette
- Om (American stoner/doom metal band)
- OM ("Singer" "Sober" "Reezons")
- Om Unit
