- Octave Lissner
- Octave Minds (Chilly Gonzales and Boys Noize collaboration)
- Octave Minds feat. Chance the Rapper & Social Experiment, The
- Octave Noire (formerly known as Oh Morice)
- Octave One (Burden brothers, US techno producers)
- Octave One feat. Saunderson, Ann
- Octaves (US hardcore band from Baltimore, MD)
- Octavia (Bolivian pop)
- Octavia Sperati (Norse gothic metal band)
- Octavia Wakes
- Octavian (South-London based rapper)
- Octavian feat. ABRA
- Octavian feat. ASAP Ferg
- Octavian feat. J Rick & Ware, Jessie
- Octavian feat. London, Theophilus
- Octavian feat. Skepta & Phantom, Michael
- Octavian feat. Smokepurpp
- Octavian ft. Gunna & SAINt JHN
- Octavian ft. Phantom, Michael
- Octavian ft. Skepta
- OCTAVIO
- Octavio Mai (French electronic/alternative duo of Juliette Bazenet and Johan Putet)
- Octavio the Dweeb
- octi
- Octinomos
- OCTiV
- OCTiV feat. Celldweller
- Octo Octa
- October 31
- October Burns Black
- October Country
- October Dogs
- October Drift
- October Ends
- October Fall (piano-fueled pop punk band)
- October Falls (Finnish atmospheric black metal)
- October File
- October Light
- October London
- October Noir
- October Project
- October Rage
- October Sky
- October Tide
- Octobre (rock band from Quebec)
- Octobre Rouge (French rap group)
- OctoLab
- Octopus (UK britpop group)
- Octopus (1970s German progressive rock group)
- Octopus (1970s Belgian pop band)
- Octopus (Progressive metal band from Chile)
- Octopus (1970s British psychedelic pop band)
- Octopus (1970s UK psychedelic rock band from Hatfield)
- Octopus Montage
- Octopus Project, The
- OCTPATH
- Octubre (spanish power-pop)
- OCULA
- OCULA feat. Tailor
- Oculos (Death/Thrash Metal band from Turkey)
- Oczojebny, Jakub
- Oczojebny, Jakub feat. Gwiazdunia, Temresa
- OD Kokemus
- OD404
- ODA (Pop Singer)
- Oda, Kaori
- Oda, Kazumasa
- Oda, Tetsurou
- Odani, Misako
- Odar
- Odawas
- Odbicia, W Witrynach
- ODC (Modern Rock and Metal project created and led by Celia Do)
- Odd (Norwegian singer/songwriter Odd Nordheim)
- Odd (Filipino post-rock band from Dumaguete)
- Odd Beholder
- Odd Børre
- Odd Chap
- Odd Couple (house artist)
- Odd Couple (rock ’n’ roll)
- Odd Couple, The (US hip-hop duo Louis Logic & Jay Love)
- Odd Crew
- ODD EYE
- ODD EYE CIRCLE (South Korean girl group)
- Odd Future
- Odd Logic (US prog rock/metal)
- Odd Mob
- Odd Mob feat. Blackman, Bertie
- Odd Nosdam
- Odd Nosdam feat. Bailiff, Jessica
