| Tousside(noun, name, volcano, geology) |
| Towada(noun, name, volcano, geology) |
| Toya(noun, name, volcano, geology) |
| Traitor's Head(expression, name, volcano, geology, history) |
| Tralihue(noun, name, volcano, geology) |
| Tres Virgenes(expression, name, volcano, geology, history) |
| Tri Sestry(expression, name, volcano, geology, history) |
| Trident(noun, name, volcano, geology) |
| Trindade and Martin Vaz(expression, name, volcano, geology, history) |
| Triplex Cone(expression, name, volcano, geology, history) |
| Tristan da Cunha(expression, name, volcano, geology, history) |
| Trois Pitons(expression, name, volcano, geology, history) |
| Trolon(noun, name, volcano, geology) |
| Tromen(noun, name, volcano, geology) |
| Tronador(noun, name, volcano, geology) |
| Tseax River Cone(expression, name, volcano, geology, history) |
| Tshibinda(noun, name, volcano, geology) |
| Tskhouk-Karckar(expression, name, volcano, geology, history) |
| Tujle(noun, name, volcano, geology) |
| Tullu Moje(expression, name, volcano, geology, history) |