- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- OceOct
- OctOdd
- OddODE
- ODEOdu
- ODVOff
- OffOG
- OGOh
- OHOhm
- OhmOjo
- OjoOki
- OkiOla
- OlaOld
- OldOle
- OleOli
- OliOlo
- OloOma
- OmaOme
- OmeON
- ONOne
- OneONE
- ONEOne
- OneOnl
- OnlOnu
- OnwOpa
- OpaOph
- OphOR
- OrOrb
- OrbOrc
- OrcOre
- OreOri
- OriOrk
- OrkOrp
- OrpOrs
- Orsory
- OrzOsc
- OscOsl
- OslOst
- OstOti
- OtiOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxm
- OXOOzo
- OzoOZZ
- Orsen
- Orsen, Jack
- Orsen, Jack & Taktloss
- Orsenna, Erik
- Orsi
- orso, L' (Italian band)
- Orsolics, Hans
- Orson (00s US power pop band)
- Orsons, Die
- Orsons, Die feat. Cro
- Orsons, Die feat. Maxim
- Orsons, Die feat. Mine
- Orta, Choco
- Orta, Manuel
- Orta, María (Puerto Rican Christian music singer)
- Ortaç, Serdar
- Ortaçgil, Bülent
- Ortaçgil, Bülent & Kızılok, Fikret
- Ortaçgil, Bülent & Teoman
- Ortak, Svaba (rapper from Austria)
- Ortega, Anthony (jazz saxophonist)
- Ortega, Anthony, Trio
- Ortega, Emanuel
- Ortega, Fernando
- Ortega, Jeannie
- Ortega, Jeannie feat. Papoose
- Ortega, José (designer)
- Ortega, Lindi
- Ortega, Michael
- Ortega, Paco
- Ortega, Palito
- Ortegon, Sr (José Miguel Ortegón)
- Ortelli, Paolo
- Ortelli, Paolo, Matrix, DJ, Party Boomers feat. C, Jay
- Ortero, David
- Orth, Marisa
- Orthentix
- Orthodox (Spanish doom metal)
- Orthodox (Straight Edge)
- Orthodox Celts
- Orthostat
- orti (electronic/electroclash/techno project)
- Orties
- Ortiga (Former Esteban & Manuel member)
- Ortiz, Alfredo (player of the Paraguayan harp)
- Ortiz, Bill
- Ortiz, Coqui
- Ortiz, Gerardo (Regional Mexican singer)
- Ortiz, Joell (rapper fka Jo‐ell Quikman)
- Ortiz, Joell feat. Akon
- Ortiz, Joell feat. Bruja, La
- Ortiz, Joell feat. Immortal Technique
- 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)
- Oruç, Mustafa
- Orup (Swedish musician Hans Thomas Eriksson)
- 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
