- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- Oceoch
- OchOct
- OctOde
- OdeOdo
- OdoOfa
- OfaOff
- OffO
- OOha
- OhaOiz
- OizOKA
- OKAOl
- OlOld
- OldOle
- OleOli
- OliOli
- OliOls
- OlsOma
- OmaOml
- OmmOn
- OnOne
- OneOne
- OneOne
- OneOnl
- OnlOny
- OnyOpe
- OpeOpi
- OpiOra
- OraOrb
- orbOrc
- OrcOrf
- OrfOri
- OriOrk
- ORKOrp
- OrpOrs
- OrsOry
- OryOsb
- OsbOsl
- OslOST
- ostOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOVA
- OvaOve
- OveOwe
- OweOxf
- OxfOze
- OZZ
- Oben, Cahit
- Obenski, Amy
- Oberbaum (German/Belgian artist Lucie Rezsöhazy)
- Oberer Totpunkt
- Oberg
- Öberg, Mats
- Oberhofer
- Oberhofer, Brad
- Oberle, Gregory
- Oberlin, Karen
- Oberpichler, Rale
- Oberritter Dóra ft. Lotfi, Begi
- Oberschlesien
- Oberst, Conor
- Oberst, Conor and Mystic Valley Band, The
- Obese Turtles, The (Kimya Dawson side project)
- Obeses
- Obey City
- Obey Me! Boys
- Obey the Brave
- Obey, Ebenezer
- OBGMs, The
- Obi (UK britpop band)
- Obi Best (formerly called Colorforms)
- Obia le Chef
- Obia le Chef avec Caballero & JeanJass
- Obia le Chef feat. Tizzo
- Obiat
- Obibox
- Obie Hans
- Obiedo, Ray
- Obieglo, Andreas
- Obispo, Pascal
- Obispo, Pascal & Alexia Gredy
- Obispo, Pascal & Angi, Giordana
- Obispo, Pascal & Frégé, Élodie
- Obispo, Pascal & Mars, Mélissa
- Obispo, Pascal & St-Pier, Natasha
- Obispo, Pascal avec Zazie
- Obispo, Pascal feat. Calogero
- Obispo, Pascal feat. Casal, Luz
- Obispo, Pascal feat. Hallyday, Johnny
- Obispo, Pascal feat. La Troupe des Dix Commandements
- Obispo, Pascal feat. N'Dour, Youssou
- Obispo, Pascal feat. N’Dour, Youssou
- Obispo, Pascal feat. Pagny, Florent
- Obispo, Pascal feat. Stoner, Sam
- Obispo, Pascal feat. Zazie
- Obispo, Pascal, Willem, Christophe, Fiori, Patrick, Alizée
- Obito
- Obits
- Obituary (US death metal band)
- Objekt (TJ Hertz)
- Objektif
- Objetivo Birmania
- OBK
- OBLADAET (Russian rapper)
- Obladaun (Russian parody rap)
- obli
- Obligaatiot
- Obligatorisk Tortyr
- Obliging Victims, The
- Oblio (Alt-rock trio based in Pasadena California)
- Oblique (New Wave/Electronic)
- Oblique (Bangladeshi band)
- Oblique Brown
- Obliterate (Slovak grindcore)
- Obliterate (Canadian deathcore)
- Obliterations
- Oblivia (Australian band)
- Oblivians (US garage punk trio)
- Oblivion (Chicago punk band)
- Oblivion (Blackened Technical Death Metal from the Bay Area)
- Oblivion (New Jersey thrash metal band)
- Oblivion (US metal band from Bay Area, California)
- OBLIVION DUST
- OBLVYN
- OBN Dev
- ObnoXiouS (Dutch metal band)
- Obo & Jorge
- Obojeni program
- Obongjayar
- Obongjayar feat. Garcia, Nubya
- OBOY (French rapper, Mihaja Ramiarinarivo)
- Obradors, Fernando
- Obregon, Juan (from Venezuela, Obregon Music, Obregon hand move)
- Obrero
- Obrint Pas
- OBS (German DJ duo)
- Obscenity (German death metal band)
