Os or Os i ÃÂsterdalen is the administrative centre of Os Municipality in Innlandet county, Norway. The village is located along the upper part of the river GlÃÂ¥ma, about northeast of the village of Tolga and about southwest of the town of Røros. The Os Church is located in the village.
The village has a population (2024) of 687 and a population density of . This village is the only urban area in the municipality according to Statistics Norway.
The village lies in the GlÃÂ¥ma river valley and the mountain HÃÂ¥mmÃÂ¥lsfjellet lies about south of the village. The village of Dalsbygda lies about to the northwest of this village and the village of Narbuvoll lies about to the southeast of this village.
The village lies along the County Road 30 and the Rørosbanen railway line, with a stop at Os Station.