| Tiarno di Sotto | |
| Coordinates: | 45.9°N 51°W |
| Region: | Trentino-Alto Adige/Südtirol |
| Province: | Trentino (TN) |
| Comune: | Ledro |
| Area Footnotes: | (referred to the former municipality) |
| Area Total Km2: | 9.2 |
| Population Total: | 704 |
| Population As Of: | Dec. 2004 |
| Gentilic: | Tiarnesi or ledrensi |
| Elevation M: | 728 |
| Postal Code: | 38060 |
| Area Code: | 0464 |
Tiarno di Sotto was a comune (municipality) in the Trentino in the Italian region Trentino-Alto Adige/Südtirol. On January 1, 2010 it merged (with Pieve di Ledro, Bezzecca, Concei, Molina di Ledro and Tiarno di Sopra) in the new municipality of Ledro. [1] It is located about 40 km southwest of Trento.