| Official Name: | Hessdalen |
| Image Alt: | Hessdalen |
| Settlement Type: | Village |
| Pushpin Map: | Trøndelag#Norway |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location of the village |
| Subdivision Type: | Country |
| Subdivision Name: | Norway |
| Subdivision Name1: | Central Norway |
| Subdivision Name2: | Trøndelag |
| Subdivision Type3: | District |
| Subdivision Name3: | Gauldalen |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Holtålen |
| Utc Offset1: | +01:00 |
| Utc Offset1 Dst: | +02:00 |
| Postal Code Type: | Post Code |
| Postal Code: | 7380 Ålen |
| Coordinates: | 62.7933°N 11.1883°W |
| Elevation M: | 617 |
| Elevation Footnotes: | [1] |
Hessdalen is a village in the municipality of Holtålen in Trøndelag county, Norway. Hessdalen also refers to the 15km (09miles) long valley that surrounds the village. Hessdalen is located in the central part of the valley, approximately south of the city of Trondheim, approximately north of the mining town of Røros, and about southwest of the village of Renbygda. About 150 people live in the village and surrounding valley.
Hessdalen Church is located in the village of Hessdalen and the lake Øyungen lies about southwest of the village. The Hessdalen area is known for the occurrence of unexplained aerial luminous phenomena called the Hessdalen lights. The phenomenon is monitored by the Hessdalen AMS.
The first element is the name of the local river Hesja and the last element is the definite form of dal, which means "dale" or "valley".