- O
- OO
- OO
- OO
- OOaf
- OAFOaK
- OakOBE
- ObeObn
- OBO
- Oce
- OceOCS
- OCTOct
- OctOdd
- OddODE
- ODEOdo
- OdoOf
- OfOff
- OffOff
- OffOgr
- OgrOh
- ohOHM
- OHNOiz
- OizOka
- OkaOkl
- OklOla
- OlaOld
- OldOld
- OldOle
- OleOli
- OliOli
- OliOls
- OlsOm
- OMOma
- OmaOme
- OmeOMO
- OmoOna
- OnaOne
- ONEONE
- ONEOne
- OneONE
- ONEOnl
- OnlOns
- OnsOol
- OolOpe
- OpeOPF
- OpgOpt
- OptOra
- OraOrb
- OrbOrc
- Orcorc
- orcOre
- OreOrh
- OrhOri
- OriOrk
- OrkOrn
- OrnOrq
- OrqOrs
- OrsOrt
- OrtOsb
- OsbOsc
- OscOsl
- OslOst
- OstOte
- OteOTR
- OTROtt
- OttOud
- OueOur
- OurOut
- OUTOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOwl
- OwlOxo
- Oxo
- OzOzu
- ozwozz
- 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)
- Octubre Doce
- OCULA
- OCULA feat. LaRue, Phillip
- OCULA feat. Tailor
- Oculist, The
- Oculos (Death/Thrash Metal band from Turkey)
- Ocults
- Oczojebny, Jakub
- Oczojebny, Jakub feat. Kiti
- OD Band
- OD Bongo
- OD Kokemus
- OD404
- Oda (Norwegian pop singer)
- Oda (French stoner doom band)
- Oda Loves You
- Oda, Hiroyuki pres. HanasoumenP
- Oda, Kaori (KAORI for Yuki Kajiura)
- Oda, Kazumasa
- Oda, Tetsurou
- Oda, Yuji
- Oda, Yuji
- ODAE
- Odal, Billy
- Odani, Misako
- Odar (Bosnian Black Metal from Sarajevo)
- Odawas
- Odbicia, W Witrynach
- ODC (Modern Rock and Metal project created and led by Celia Do)
- ODC feat. SUN
- Odd (Norwegian singer/songwriter Odd Nordheim)
- Odd (Filipino post-rock band from Dumaguete)
- Odd Advantage, The (Ska band from Hemet, California)
- Odd Beholder (Swiss pop duo)
- Odd Børre
- Odd Chap
- Odd Chap & Lea, Emma
- Odd Chap & Lyre Le Temps
- Odd Chap & Rose, Octavia
- Odd Chap, Myers, Sarah
- Odd Couple (house artist)
- Odd Couple (German garage rock band)
- Odd Couple, The (US hip-hop duo Louis Logic & Jay Love)
- Odd Couple, The feat. Celph Titled, J‐Zone & Brown, J.J.
- Odd Crew
- ODD EYE
- ODD EYE CIRCLE (South Korean girl group)
- ODD Foot Works
- Odd Future
- Odd Logic (US prog rock/metal)
- Odd Mob
- Odd Mob & OMNOM: HYPERBEAM
- Odd Mob feat. Alexander, Kameron
- Odd Mob feat. Blackman, Bertie
- Odd Mob feat. Graves, Ed
- Odd Mob ft. Blackman, Bertie
- Odd Mob ft. Lizzy Land
- Odd Mob x Super Silly
- Odd Mob, OMNOM & Clark, Roland
- Odd Mob, OMNOM & HYPERBEAM
- Odd Nosdam
- Odd Nosdam feat. Bailiff, Jessica
- Odd Numbers, The
- Odd Pace (HEAVY HARDCORE STRAIGHT OUT OF EASTERN GERMANY)
- Odd Palace
- Odd Project
- Odd Robot
- Odd Signature (Bangladeshi Band)
- Odd Socks
- Odd Squad
- Odd Sweetheart
- Odd Thomas (Thomas Joseph Terry)
- Odd Tuesday
- Odd Us
- Odd Years
- Oddateee
- Oddballs, The (Garage Punk Rock)
- oddCouple feat. Woods, Jamila & Collins, Kweku
- ODDEEO
- ODDEEO & Karma Wears White Ties
- ODDEEO + Karma Wears White Ties
- Oddessey
- Oddfellows
