Osen (village)Osen is the administrative centre of Osen Municipality in Trøndelag county, Norway. It is located about northeast of the village of Bessaker. Osen Church is located in the village.NameThe 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.