| Tänndalen | |
| Native Name: | Tänndalen |
| Native Name Lang: | sv |
| Settlement Type: | minor locality |
| Subdivision Type: | Swedish county |
| Subdivision Name: | Jämtland |
| Subdivision Type1: | Municipalities of Sweden |
| Subdivision Name1: | Härjedalen |
| Unit Pref: | Metric |
| Population Total: | 66 |
| Population As Of: | 2010 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
Tänndalen, Southern Sami: Teanndaelie,[1] is a minor locality in Härjedalen Municipality, Sweden. It had 66 inhabitants in 2010.