| Official Name: | Osen |
| Other Name: | Steinsdalen |
| Settlement Type: | Village |
| Pushpin Map: | Trøndelag#Norway |
| Pushpin Label Position: | top |
| Subdivision Type: | Country |
| Subdivision Name: | Norway |
| Subdivision Name1: | Central Norway |
| Subdivision Name2: | Trøndelag |
| Subdivision Type3: | District |
| Subdivision Name3: | Fosen |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Osen Municipality |
| Utc Offset1: | +01:00 |
| Utc Offset1 Dst: | +02:00 |
| Postal Code Type: | Post Code |
| Postal Code: | 7740 Steinsdalen |
| Coordinates: | 64.2976°N 10.5106°W |
| Elevation M: | 21 |
| Elevation Footnotes: | [1] |
Osen[2] (sometimes called Steinsdalen) is the administrative centre of Osen Municipality in Trøndelag county, Norway. It is located about northeast of the village of Bessaker (in Åfjord Municipality and about south of the village of Seter (by ferry - if driving by road to Seter, it would be over through two other municipalities).[3] Osen Church is located in the village.
The village area is officially named Osen by the Norwegian Mapping Authority. The village area lies in the lower part of the Steinsdalen valley, at the mouth of the river Steinsdalselva, so the village is sometimes called Steinsdalen.