- 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
- OnuOoy
- OozOpe
- OpgOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOri
- OriOrn
- OrnOrq
- OrqOrt
- OrtOsb
- OsbOsh
- OshOss
- OssOte
- OteOtt
- Ott
- Out
- OutOut
- OutOut
- OutOve
- OveOvi
- OviOwl
- OwlOXO
- OxoOzo
- OzoOZZ
- Ortiz, Joell feat. Novel
- Ortiz, Kevin
- Ortiz, Luis “Perico”
- Ortiz, Paul y La Orquesta Son
- Ortize, Brian
- Ortolani, Riz
- Ortolani, Riz feat. Ranieri, Katyna
- Orton, Beth
- Orton, Beth feat. Callier, Terry
- Orton, Mark
- Ortopedia Técnica (Garage Punk band from Castellón de la Plana)
- ortoPilot
- Ortsul (Poland / Black Metal)
- Oruã (Brazilian group)
- Oruam
- Oruç, Mustafa
- Orup (Swedish musician Hans Thomas Eriksson)
- Örvarsson, Atli (Icelandic score composer)
- Orville Peck
- Orville Peck & Beck
- Orville Peck & Cuarón, Bu
- Orville Peck & Cyrus, Noah
- Orville Peck & Dawson, Debbii
- Orville Peck & John, Elton
- Orville Peck & Midland
- Orville Peck & Nelson, Willie
- Orville Peck & Rateliff, Nathaniel
- Orville Peck & Russell, Allison
- Orville Peck & Swims, Teddy
- Orville Peck, Minogue, Kylie & Diplo
- Orville Peck, Osborne, TJ, Payne, Waylon & Hagood, Fancy
- Orville Peck, Tuttle, Molly & Golden Highway
- Orvokki
- Orwell (French band)
- Orwells, The
- Orxata Sound System
- Ory, Kid
- Oryad (doom metal/symphonic metal group)
- Oryema, Geoffrey
- oryl
- Oryon (Dutch producer Peter Smit)
- Orzabal, Roland (UK musician, songwriter and producer)
- OS (German duo)
- Os 3 do Nordeste
- Os Atuais
- Os Bardos
- Os Borges
- Os Cabeloduro
- Os Cretinos
- Os Dentes
- Os Extintos
- Os Garotin
- Os Mateadores
- Os Mulheres Negras
- Os Mundi
- Os Nativos (South-Brazilian gaucho music group)
- Os Pontos Negros
- Os Quebradeiras
- Os Serranos
- Os The Darma Lóvers
- Os Tincoãs
- Os Vips
- Os Vips (Os Vips)
- OS101 (hardcore punk band)
- Osa (El Caco frontman Øyvind Osa's solo project)
- Osa, Liv Bernhoft (Norwegian actress)
- Osada Vida
- Osadebe, Stephen Osita, Chief
- Osaen
- Osage Tribe
- Osaka Flu
- Osaka Monaurail
- Osaka Popstar
- Osaka Punch (Australian rock band, formerly The Kidney Thieves)
- Osaka Syunkasyuto
- Osaki (jazz hop)
- Osaki ft. Sleepermane
- Osaki, Nana starring Nakashima, Mika
- OsamaSon (underground artist)
- Osanna
- Osanzi
- Osasioo (Canadian RnB Artist)
- Osatia
- Osawa, Shinichi
- Osay (American rapper, singer-songwriter)
- Osaze feat. Veda, Jaidene
- Osborn Abigail
- Osborne (Todd Osborn)
- Osborne Brothers, The
- Osborne Brothers, The & Allen, Harley "Red"
