- ‡ Tagarot (Folk-metal)
- ‡ Tales of Ale (Melo Death/Folk-metal)
- Tales of Ratatösk (Folk-metal)
- Tanzwut (Mittelalter/Rock/Alternative)
- ‡ Taurisca (Folk/Death Metal)
- Temnoles’ye (Melodic/Folk-metal)
- Temnozor (Folk/Black Metal)
- Temple of the Stars (Folk infl. Rock/Metal)
- ‡ Tengger Cavalry (Asian Folk-metal)
- ‡ Tengwar (Epic Folk-metal)
- Teren (Folk-metal)
- Tersivel (Folk/Pagan/Power Metal)
- Teshaleh (Sorcery Folk-metal)
- ‡ Teufelswerk & Narrentanz (Folk-metal)
- ‡ Thalanos (Folk-metal)
- Tharaphita (Pagan Black Metal)
- ‡ The Black Tartan Clan (Celtic Punk)
- The Chant of Trees (Mediative Folk-metal)
- The Clan (Irish Rock)
- The Crazy Rogues (Celtic Punk)
- The Dread Crew of Oddwood (Acoustic Folk-metal)
- ‡ The Devout (Melo Folk/Death Metal)
- The Dreadnoughts (Celtic Punk)
- The Entropies (Persian Prog. Rock)
- The Fatty Farmers (Folk Punk Rock)
- The Flight of Sleipnir (Doom/Folk-metal)
- ‡ The Gentle Storm (Folk/Heavy metal)
- The Groggy Dogs (Pirate Metal)
- The Hu (Mongolian Hunnu Rock)
- Theigns & Thralls (Folk Rock/Metal)
- The Mahones (Celtic Punk)
- The McGonagalls (Celtic Punk)
- ‡ The Mist and the Morning Dew (Folk-metal/Doom)
- The Porters (Folk Punk)
- The Privateer (Pirate Metal)
- The Real McKenzies (Scottish Punk)
- The Rogues from County Hell (Folk Punk)
- The Royal Spuds (Folkpunk)
- The Rumjacks (Celtic Punk)
- ‡ The Samans (Folk/Industrial Metal)
- ‡ The Sunday Punchers (Folk Punk)
- The Wolves of Avalon (Folk/Pagan Metal)
- Theudho (Pagan/Black Metal)
- ‡ Thirteenth Tambourine (Folk-metal)
- Thormesis (Pagan Black Metal)
- Thorondir (Viking/Black Metal)
- Thrawsunblat (Melodic Folk/Black Metal)
- ‡ Thronar (Atm. Folk Black Metal)
- ‡ Throne of Wilderness (Folk-metal)
- Thrudvangar (Viking Black Metal)
- ‡ Thunderkraft (Industrial/Death/ Metal)
- Thyrfing (Viking/Black Metal)
- Thy Worshiper (Folk infl. Pagan Metal)
- ‡ Time of Tales (Folk-metal)
- Tim Trollgasm (Folk-metal)
- Tinʹ Sontsya (Folk-metal/Heavy Folk)
- ‡ Tolk (Folk-metal)
- ‡ Top (Black Folk-metal)
- Toter Fisch (Folk-metal)
- Toxic Frogs (Celtic Punkrock)
- ‡ Traktir (Beer Folk-metal)
- ‡ Trelleborg (Symphonic Folk/Viking Metal)
- Triddana (Folk-metal)
- ‡ Triglav (Black Folk-metal)
- Trikhorn (Pirate metal)
- ‡ Trinadtsatiy Buben (Pagan Folk-metal)
- ‡ Trobar (Folk-metal)
- Troin (Tavern Folk-metal)
- Trold (Folk-metal)
- Troldhaugen (Folk-metal)
- Trollband (Folk/Black Metal)
- Troll bends fir (Folk Rock/Folk-metal)
- Trollfest (True Norwegian Balkan Metal)
- ‡ Trollgasm (Folk Black Metal)
- Trollheart (Folk Black Metal)
- Trollheim’s (Folk-metal)
- ‡ Trollhorn (Folk-metal)
- ‡ Trollort (Troll/Folk-metal)
- Trollwald (Folk/Death-metal)
- Trollwar (Folk/Deathmetal)
- ‡ Trollward (Trollish Folk-metal)
- Tuatha de Danann (Celtic/Folk Metal)
- ‡ Tumulus (Progressive Folk-metal)
- ‡ Tupi Nambha (Tribal Metal)
- Turisas (Folk/Symphonic Metal)
- TurnCloak (Folk/Viking Metal)
- Tverd (Folk-metal)
- Twisted Mist (Death/Folk-metal)
- Tyr (Progressive/Folk-metal)