- O
- OO
- OO
- OOak
- OakObi
- ObiObu
- ObOce
- OceOct
- OctOdd
- OddOdo
- OdoOfa
- OfdOG
- OGOh
- OhOhn
- OHOOK
- OKOkt
- OktOld
- OldOle
- OleOli
- OliOlm
- Oma
- OMAOmg
- omgOn
- OnOne
- OneOne
- OneONE
- ONEOno
- OnoOon
- OonOpe
- OpeOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOrl
- OrlOrq
- OrqOrt
- OrtOsb
- OsbOsk
- OskOst
- OstOti
- OtiOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOwe
- OweOx
- Ox
- OZZ
- Obús
- obylx
- Obywatel G.C.
- OC Hermo
- OC Ska Kids
- OC Times (Barbershop Quartet)
- OC, Charlotte (Singer)
- Ocak, Arif Erdem
- Ocaklı, Erkan
- Öçal, Burhan & Trakya All Stars, The
- Ocampo, Pablo
- Ocaña, Chico
- Ocarina
- Ocasek, Ric
- Occams Laser
- Occasionally Humans
- Occidens
- Occult (Dutch thrash metal band)
- Occult Hand Order
- Occultation (US Doom Metal)
- Occults
- OCD (Philadelphia rap duo)
- Oceaán (Brussels-born Manchurian electronic music producer)
- Oceán (Czech electronic group)
- Ocean (US gospel rock band from the 1970s)
- Ocean (Swiss soft rock and folk rock band)
- Ocean (Polish Rock Band)
- Ocean Alley
- Ocean Blue, The (American indie pop)
- Ocean Chief
- Ocean Colour Scene
- Ocean Drive
- Ocean Drive feat. Oriska, DJ
- Ocean Flaws
- Ocean Grove (Australian nu metal band)
- Ocean Grove (United States)
- Ocean Grove feat. Dune Rats
- Ocean Grove feat. lil aaron
- Ocean Hills (Rock band from Los Angeles)
- 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 Voyager
- 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
- Ocean’s Edge
- 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 (DJ & producer Job 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