- Ocean (FRA) (Hard Rock-France)
- Ocean (USA) (Sludge Doom-USA)
- Ocean Architecture (Progressive Metal-USA) - Other name : OA
- Ocean Bed (Heavy Rock-Germany)
- Ocean Chief (Sludge Doom-Sweden)
- Ocean City (Post Hardcore-United-Kingdom)
- Ocean Depths (Metalcore-Netherlands)
- Ocean Districts (Post Hardcore-Estonia)
- Ocean Grove (Nu Metal-Australia)
- Ocean Hills (Hard Rock-USA)
- Ocean In Sight (Metalcore-Ukraine) - Other name : OIS
- Ocean Of Ghosts (Drone-USA)
- Ocean Of Grief (Melodic Doom-Greece)
- Ocean Of Illusions (Deathcore-USA)
- Vesuvian (Progressive Death-USA) - Other name : Ocean Of Ossession
- Ocean Of Plague (Modern Metal-Germany)
- Ocean Of Sorrow (Doom Metal-Russia)
- Ocean Of Zero (Death Metal-Australia) - Other name : OOZ
- Ocean Sleeper (Metalcore-Australia) - Other name : OS
- Ocean Soul (Power Metal-Brazil)
- Ocean Towers (Doom Metal-Canada)
- Ocean Wake (Death Doom-Finland)
- Ocean Walker (Progressive Metal-United-Kingdom)
- Ocean Within (Deathcore-Finland)
- Ocean's Aftermath (Metalcore-USA)
- Oceana (ITA) (Gothic Death-Italy)
- Oceana (USA) (Post Hardcore-USA)
- Polyenso (Post Hardcore-USA) - Other name : ex-Oceana
- Oceanborn (Progressive Metal-USA)
- Oceangrave (Death Doom-Italy)
- Oceangraves (Metalcore-Mexico)
- Oceanhoarse (Heavy Metal-Finland)
- Oceanica (Progressive Metal-United-Kingdom)
- Oceano (Deathcore-USA)
- Océano De Sangre (Progressive Metal-Argentina)
- Océanos (Post Hardcore-Argentina)
- Oceanpath (Symphonic Metal-Latvia)
- Oceans (Metalcore-Austria)
- Oceans Apart (Metalcore-United-Kingdom)
- Oceans Asleep (Metalcore-France)
- Oceans Ate Alaska (Metalcore-United-Kingdom) - Other name : OAA
- Oceans Away (Screamo-Australia) - Other name : OA
- Oceans Of December (Metalcore-USA) - Other name : OOD
- Oceans Of Flesh (Death Thrash-USA)
- Oceans Of Night (Progressive Metal-USA)
- Oceans Of Sadness (Gothic Death-Belgium)
- Oceans Of Slumber (Progressive Death-USA)
- Oceans Of Time (Progressive Power-Norway)
- Oceans Red (Electro Metal-Other) - Other name : OR
- Oceans Will Part (Metalcore-USA) - Other name : OWP
- Oceans Will Rise (Metalcore-Canada)
- Oceansnow (Atmospheric Black-USA)
- Oceanus (Atmospheric Metal-United-Kingdom) - Other name : ex-Hagakure
- Oceanus Procellarum (Gothic Black-Ecuador)
