- O
- OO
- OO
- OOat
- OatObl
- OBLOce
- OceOCn
- OcoODC
- OddODE
- ODEOf
- OfOff
- OFFOh
- OhOhm
- Ohmok
- OKOkt
- OktOld
- OldOle
- OleOli
- OliOls
- OlsOmb
- OmbOmn
- OmnOnd
- OndOne
- OneONE
- oneOnl
- OnlOom
- OomOpe
- OpeOpu
- OpuOrb
- OrbOrc
- OrcOrg
- OrgOri
- OriOrn
- OrnOrr
- OrrOs
- OsOsc
- OscOss
- OssOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OUTOve
- OVEOwe
- OweOxa
- OxaOze
- OZZ
- Ocean Grove (United States)
- Ocean Grove feat. Dune Rats
- Ocean Grove feat. lil aaron
- Ocean Is Theory
- ocean jams
- Ocean Jet
- Ocean Kelly (Rapper, Legendary Icon)
- Ocean Music
- Ocean of Grief
- Ocean Park Standoff
- Ocean Party, The
- Ocean Sleeper (Metalcore band)
- Ocean Tides
- Ocean Wings
- Ocean, Billy
- Ocean, Daniel (trance DJ & producer from Odessa, Ukraine)
- Ocean, Danny (Venezuelan singer, songwriter and producer, "Me rehúso"/"Baby I Won’t")
- Ocean, Danny & Dread Mar-I
- Ocean, Danny & Guaynaa
- Ocean, Danny & Quiles, Justin
- Ocean, Danny & TINI
- Ocean, Danny & Tokischa
- Ocean, Frank
- Ocean, Frank feat. André 3000
- Ocean, Frank feat. Earl Sweatshirt
- Ocean, Nikki
- Ocean, Silent & A, Aditya
- Ocean, The (German metal band)
- Ocean, Tommy
- Oceana (US indie rock/post-hardcore band)
- Oceana (German soul singer)
- Oceana & Frank, Kim
- Oceanator (Elise Okusami)
- Oceanborn
- oceanfromtheblue (Korean singer)
- Oceanhoarse
- Oceania (New Zealand, Hinewehi Mohi & Jaz Coleman)
- Oceanic (90s UK pop group)
- Oceanic (J.M. Oberman)
- OceanLab
- OceanLab feat. Emery, Gareth
- OceanLab feat. Suissa, Justine
- OCEANLANE
- Oceano (American deathcore band)
- Océano de Sangre
- Oceans (Kiz aka Kiz Keyz)
- Oceans (post‐metal/metalcore)
- Oceans Above (Christian Worship Band)
- Oceans Ate Alaska
- Oceans Ate Alaska feat. Teyen, Alex
- Oceans Divide
- Oceans of Slumber
- Oceans of Time
- Oceans Red
- Oceans, The
- Oceanship
- Oceanside85
- Oceansize
- Oceanspeak
- Oceanus (future disco)
- Oceanwake
- Oceill
- Ocelots, The (Irish indie folk duo)
- Oceransky, Edgar
- Ochaion, Kfir
- Ocher, Mary
- Ochman (Polish singer-songwriter Krystian Ochman)
- Ochman & @Atutowy
- Ochmoneks (from Düsseldorf Germany)
- Ocho
- Ocho Macho
- Ocho y Media
- Ochoa, Amparo
- Ochoa, Eliades
- Ochoa, Eliades y el Cuarteto Patria
- Ochoa, Kelvis
- Ochoa, Rolando
- Ochobre
- Ochre (electronic musician Christopher Leary, UK)
- ochre (Scottish post-punk band)
- Ochs, Conny
- Ochs, Phil
- Ocie Elliott
- Ócio (Brazilian rock band)
- Ock, Sam
- Ockeghem, Johannes (Franco-Flemish early Renaissance composer)
- Ockert, Darren
- Ockham’s Razor (folk rock quartet based out of Seattle)
- OCN
- OCnotes
