- OutKast featuring Dawson, Rosario
- OutKast featuring Jones, Norah
- OutKast featuring Killer Mike
- Outl4w
- Outlandish
- Outlandish feat. Majid
- Outlandish feat. Providers
- Outlast
- Outlasted (Norwegian rock band)
- Outlaw (Black metal band from Capannori, Italy)
- Outlaw (Black metal from Brazil)
- Outlaw Blood
- Outlaw Heroes Standing
- Outlaw, Sam (Southern California Country musician)
- Outlaws (seminal US southern rock band)
- Outlaws, The (Southern Rock Band)
- Outlaws, The (Southern rock from Florida)
- Outlawz (rap group founded by 2Pac)
- Outliar
- Outline (New Jersey hardcore punk band)
- Outline (US punk band featuring Jack Antonoff)
- Outline in Color
- Outline in Color & AVOID
- Outline Pine
- Outline, The (Los Angeles experimental rock band)
- Outlines (French breakbeat trio)
- Outloud (Greek hard rock band)
- Outloudz (Estonian band)
- OUTLYA
- Outpatience, The
- Outrage (German black/thrash metal band from Pforzheim)
- Outrage (French punk-rock band)
- Outrage (Japanese thrash metal)
- Outrageous Cherry
- Outre (Polish black metal band)
- Outro Giovane
- OutroEu
- Outrun the Fall
- Outrun the Gun
- Outs, The (Brazilian band)
- Outsaiders, Los
- Outshyne (Country Band)
- Outsidaz
- Outside (UK acid jazz group)
- Outside Agency, The
- Outside Broadcast Recordings (Meditation)
- Outside Edge
- Outside Track, The
- Outsider (Korean male rapper)
- Outsider, The (Solo Post Rock project from Palermo)
- Outsiders (Psytrance artists Haim Lev & Guy Malka from Israel)
- Outsiders, The (60's Dutch psychedelic band)
- Outsiders, The (60's USA pop/rock band)
- Outsiders, The (electro/house artist)
- Outsiders, The (Dutch drum and bass duo)
- Outsiderz 4 Life
- Outsmarting Simon
- Outspoken
- Outspoken (Hardcore, original band from 1990)
- Outspoken, We
- Outta Control (Canadian euro dance project)
- Outtrigger
- Outwork
- Outwork feat. Gee, Mr.
- Outworld (American Progressive Metal Band)
- Ouvindo
- Ouvrard, Gaston (fils)
- Ouzo Bazooka
- Ov Hell
- Ov Lustra
- Ov Moros
- Ov Sulfur
- Ov Sulfur feat. Jones, Howard
- OV7
- Oval Opus
- Oval Portrait, The
- Ovall
- Ovalle, Iván
- OVAN (Korean rapper)
- Ovations, The (US vocal group from New Jersey)
- OVCOCO
- OvDeth
- OVE (Indie-Pop Band from Hamburg, Germany)
- Ovejas Negras, Las
- Ovenden, Julian & McPhee, Katharine
- Ovens
- OVER ARM THROW
- Over Easy (American DJ/Producer Duo)
- Over It
- Over My Dead Body
