• Cabrakaän (Symphonic / Folk-metal)
• Cadacross (Melodic/Death/Folk/Metal)‡
• Caladmor (Epic Folk-metal) ‡
• Calico Jack (Pirate Folk-metal)
• Cantus Levitas (Mittelalter Rock/metal)
• Captain Jack’s Army (Speedfolk)
• Cat O’ Nine Tail (Pirate metal) ‡
• Catuvolcus (Folk/Black Metal) ‡
• Cave Growl (Alcoholic Folk-metal) ‡
• Caverns of Arnosh (Folk-metal) ‡
  Celestic (Heroic Melodic Death Metal)
• Celkilt (Folk-punk)
• Cellar Darling (Folk-metal)
• Celtachor (Celtic/Folk/Black Metal)
• Celtian (Symphonic Folk-metal)
• Celtibeerian (Folk-metal)
• Celtibeers (Folk-metal) ‡
• Celtica (Celtic Pipe Rock)
• Celtic Legacy (Folk-metal)‡
• Cemican (Prehispanic Folk-metal)
• Ceolskog (Acoustic/Folk-metal)
• Cerberus (Atmospheric/Folk Metal) ‡
• Cernunnos (Folk-metal)
• Cernunnos’ Folk Band (Folk-metal)
• Chain of Dogs (Folk/Thrash/Punk)
• Ch’aska (Folk-metal)
• Chur (Folk-metal)
• Circle J (Folk-punk)
• Circle of Grief (Gothic Metal/Folk)‡
• Circle of Tyrants (Folk/Black Metal)‡
• Claim the Throne (Melodic/Death/Folk-metal)
• Clamor Silvae (Folk Viking-metal) ‡
• The Clan (Irish Rock)
• Clanrock (Folk-metal/Celtic Rock) ‡
• Cnoc An Tursa (Folk/Black Metal) ‡
• Codex Verus (Medieval Rock)
• Conorach (Folk/Power Metal) ‡
• Corte di Lunas (Renaissance Celtic Folk Rock)
• The Crazy Rogues (Celtic Punk)
• Crimfall (Symph. Power/Folk Metal) ‡
• Cronica (Folk-metal)
• Cruachan (Celtic/Folk Metal)
• Cruadalach (Folk-metal)
• Cryptic Age (Progressive Folk-metal) ‡
• Crystalmoors (Cantabrian Pagan Metal)
• Cultus Ferox (Medieval Rock)
• Cumulo Nimbus (Renaissance Metal)‡
• Curare (Andean Folk-metal)