- O
- OO
- OO
- OOak
- OakObe
- ObeObr
- OBSOce
- OceOch
- OchOct
- OctOde
- OdeOdo
- OdoOf
- OfOff
- OffOgr
- OgrOha
- Oiz
- OizOka
- OKAOkw
- OkYOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOm
- OmOmi
- OmiOn
- OnOne
- OneOne
- OneOne
- OneOnl
- Onlonu
- OnuOos
- OotOpe
- OpeOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOri
- ORIOrn
- OrnOrq
- OrqOrt
- OrtOsb
- Osbosh
- OshOSR
- OssOte
- OteOtt
- Ott
- Ous
- OutOut
- OutOut
- OutOve
- OveOvi
- OviOwi
- OwiOxm
- OxmOzo
- Ozoozz
- 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
- Oculist, The
- Oculos (Death/Thrash Metal band from Turkey)
- Oczojebny, Jakub
- Oczojebny, Jakub feat. Kiti
- OD Kokemus
- OD404
- ODA (Pop Singer)
- Oda (French stoner doom band)
- Oda, Kaori (KAORI for Yuki Kajiura)
- Oda, Kazumasa
- Oda, Tetsurou
- Oda, Yuji
- Odani, Misako
- Odar (Bosnian Black Metal from Sarajevo)
- 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 Advantage, The (Ska band from Hemet, California)
- Odd Beholder (Swiss pop duo)
- Odd Børre
- Odd Chap
- Odd Couple (house artist)
- Odd Couple (German garage rock band)
- Odd Couple, The (US hip-hop duo Louis Logic & Jay Love)
- Odd Crew
- ODD EYE CIRCLE (South Korean girl group)
- Odd Future
- Odd Mob
- Odd Mob & OMNOM: HYPERBEAM
- Odd Mob feat. Blackman, Bertie
- Odd Mob, OMNOM & HYPERBEAM
- Odd Nosdam
- Odd Nosdam feat. Bailiff, Jessica
- Odd Numbers, The
- Odd Palace
- Odd Project
- Odd Robot
- Odd Signature (Bangladeshi Band)
- Odd Squad
- Odd Sweetheart
- Odd Thomas (Thomas Joseph Terry)
- Odd Tuesday
- Oddateee
- oddCouple feat. Woods, Jamila & Collins, Kweku
- ODDEEO
- Oddessey
- Oddfellows, The (The Oddfellows (Singapore Band))
- OddHenny
- Oddisee (DC hip hop producer/rapper)
- Oddisee feat. Diamond District
- Oddisee feat. Ragu, Priya & Sainte Ezekiel
- Oddisee feat. Real, Ralph
- Oddisee feat. Saint Louis, Olivier
- Oddisee feat. Saint Louis, Olivier
- Oddisee feat. Toine
- Oddisee feat. Toine & Trek Life
- Oddities
- OddKidOut
- OddKidOut feat. Boy Beverly
- Oddko (Los Angeles based Industrial Metal band)
- Oddland
- oDDling
- ODDLIQUOR
- Oddly
- Oddly Casual
- Oddly, Yvie
- Oddly, Yvie ft. Mateo, Vanessa Vanjie
- Oddny (Norwegian softrock band)
- Oddprophet
- Odds (Canadian rock band)
- Odds Against Tomorrow (Portland OR band)
- Oddwin (US hip-hop producer)
- Oddy Jay (S9:87R)
- Oddział Zamknięty
- ODE (Finnish rap artist)
- Odeal
- Odee-loh
- Odell Julie (Indie rock artist from New Orleans, LA)
- Odell, Tom
