C
| C.E.F.A | Death Metal/Grindcore | Кърджали | 2022 |
| C4 | Punk/Hardcore | София | 2004 |
| Cabani | Hardcore | Варна | 2002 |
| Cadaverine | Death Metal/Goregrind | Стара Загора | 2010 |
| Caliberty | Hard Rock | София | 2019 |
| Calth | Black Metal | Сандански | 2004 |
| Candy Ivory King | Alternative/Indie Rock | Харманли | 2008 |
| Carcerous | Death Metal | София | 2023 |
| Cardiodrive | Grunge | Пловдив | 2005 |
| Cart Wheel | Melodic Death Metal | Варна | 1999 |
| Cartagen | Thrash/Death Metal | Лом/Рим (Италия) | 1994 |
| Cassandra | Power Metal | Левски | 1987 |
| Castle Rock | Rock'n'Roll | София | 2009 |
| Casual Threesome | Rock'n'Roll | София | 2010 |
| Catalepsia | Melodic Black/Death Metal | Варна | 2003 |
| Catalepsy | Death Metal | Силистра | 1990 |
| Catalyst | Punk Rock | София | 2004 |
| Catorga | Alternative Metal | София | 2018 |
| Cenestelle | Soft Rock/Melodic Rock | Варна | 2016 |
| Center | Stoner Rock | София | 2010 |
| Century | Progressive Rock | Варна | 2012 |
| Certain Demise | Death Metal | София | 2020 |
| Cesspit | Grindcore | Варна | 1993 |
| Chained Rose | Alternative Rock | Бургас | 2010 |
| Chains | Progressive Thrash Metal | Благоевград | 2008 |
| Chainsaw Babies | Hard Rock | Велинград | 2014 |
| Chainsoul | Thrash/Death Metal | София | 2004 |
| Chaos Embrace | Alternative Rock/Grunge/Shoegaze | Пловдив | 2021 |
| Chaplin’s Dream | Progressive Metal | Шумен | 2014 |
| Chasing the Veracity | Hard Rock | София | 2023 |
| CheeseHeads | Punk Rock/Alternative Rock | Севлиево | 2019 |
| Choke | Metalic Hardcore | София | 2023 |
| Chongi & The Smokers | Grunge | Пловдив | 2013 |
| Church Of Destiny | Thrash/Groove Metal | София | 2013 |
| CHVoR | Alternative/Nu Metal | София | 1995 |
| Cigaretta | Avantgarde/Experimental | София | 1996 |
| Ciroza | Thrash Metal | Монтана | 2002 |
| Citizen Erased | Post Hardcore | София | 2014 |
| Claymore | Symphonic Black Metal | Русе | 1999 |
| ClearLand | Art Rock/AOR | Варна | 2000 |
| Climate | Sludge/Groove Metal/Djent | София | 2013 |
| Clot | Death Metal | Варна | 2013 |
| Cocklush | Goregrind | Плевен | 2009 |
| Cofein | Hard Rock | Пловдив | 2010 |
| Cold Breath | Hardcore/Metalcore | Варна | 2001 |
| Cold Fear | Nu Metal/Groove | Троян | 2011 |
| Cold Hate | Beatdown | София | 2019 |
| Cold In December | Metalcore | Перник | 2009 |
| Collapse Within | Melodic Deathcore | Русе | 2024 |
| Collapso | Metalcore | Пловдив | 2007 |
| Colobar | Progressive Metal | Велико Търново | 2006 |
| Coma N.D.X. | Psychedelic Rock | Лом | 1992 |
| Comasummer | Psychedelic Rock | София | 2014 |
| Comatose | Progressive Metal | София | 1990 |
| Concrete | Death Metal | Шумен | 2011 |
| Confront | Anarcho-Punk | Варна | 1991 |
| Confusion | Alternative Rock | Монтана | 2015 |
| Contradiction | Grindcore/Metalcore | Варна | 2008 |
| Contrails | Alternative Rock | Пловдив | 2012 |
| Convicted Souls | Progressive Death/Thrash Metal | София/Германия/САЩ | 1990 |
| Cool Den | Alternative Rock | София | 2018 |
| Coprophag | Death Metal/Grindcore | Русе | 2003 |
| Coprostasis | Death Metal | София | 2002 |
| Coptor Mix | Alternative Rock | София | 2007 |
| Corecom | Groove/Sludge Metal | София | 2011 |
| Corpse | Grindcore/Death Metal | Плевен | 1989 |
| Cortège | Alternative Metal | София | 2015 |
| CounterBuff | Punk Rock | Добрич | 2005 |
| Counterfit | Punk Rock | Русе | 1994 |
| Coven 5 | Alternative Metal | Пловдив | 2023 |
| Crash | Thrash Metal | София | 1988 |
| Crashbrake | New Metal | София | 2011 |
| Crazy Hearted Lovers | Hard Rock/Blues Rock | София | 2014 |
| Cream Idol | Industrial/Electronic | Враца | 1998 |
| Creep | Pop Punk | Лос Анджелис (САЩ) | 1997 |
| Creep | Groove Metal | Добрич | 2017 |
| Crisis Unfold | Experimental Metalcore | Ихтиман/София | 2021 |
| Cross | Pop Rock | Ямбол | 1995 |
| Crowfish | Punk Rock | Варна | 1997 |
| Crush | Hard Rock | София | 2012 |
| Cryptic Tomb | Death Metal | Ямбол | 2001 |
| Cryptophobism | Doom/Death Metal | Варна | 1993 |
| Crystal Neverland | Symphonic Rock | София | 2012 |
| Crystallnacht | Thrash/Death Metal | Варна | 2007 |
| Cupola | Melodic Black/Death Metal | София | 2005 |
| Cut Off | Hardcore | Благоевград | 2002 |