- Olsen, Lenay
- Olsen, Lynn (Dutch artist)
- Olsen, Troy
- Olsenbanden jr.
- Olson (German rapper)
- Olson, Alix
- Olson, Carla
- Olson, Carla & Taylor, Mick
- Olson, Evan
- Olson, Luke
- 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
- Ölveti Blues Band
- 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
- Oma 206
- Omagh Community Youth Choir
- Omaha Bitch
- Omaji, Tim (Australian singer-songwriter formerly known as Timomatic)
- Omar (British soul singer Omar Lye-Fook)
- Omar (R&B)
- OMAR (German rapper)
- Omar & Stone, Angie
- Omar & Zed Bias
- Omar and the Howlers (Blues Rock, Jump-Blues, US)
- Omar Apollo feat. Uchis, Kali
- Omar EC
- Omar Enrique
- Omar Enrique feat. Herrera, Eddy
- Omar Enrique feat. Ilegales
- Omar feat. Palladino, Pino
- Omar feat. Stone, Angie
- Omar feat. Wonder, Stevie
- Omar Rodriguez Music (Christian music singer, sonwriter, & producer)
- Omar Shané
- Omar-S
- Omar, E.T Yomille (aka El Tío)
- Omar, Nelly (Argentine tango singer)
- Omar, Rex
- Omär, Xavier (Chicago Artist)
- Omär, Xavier & Sango
- Omari, Iman
- Omarion
- Omarion feat. Big Boi
- Omarion feat. Brat, Da
- Omarion feat. Brown, Chris & Jhené Aiko
- Omarion feat. Fabolous & Pusha T
- Omarion feat. Fauntleroy, James
- Omarion feat. Houston, Marques
- Omarion feat. Jay Rock
- Omarion feat. Jeremih
- Omarion feat. Kid Ink & French Montana
- Omarion feat. Mila J
- Omarion feat. Ross, Rick
- Omartian, Michael and Omartian, Stormie
- Omb (Israeli progressive/avant-garde metal band)
