Bagn is a village located in Norway that serves as the administrative center of Sør-Aurdal Municipality in Innlandet county. It is situated within the Begnadalen valley, approximately 25 kilometres southeast of the town of Fagernes.
The village is characterized by its location along the river Begna, which flows through the Valdres region and features a 16-metre tall waterfall at Bagn. Additionally, the European route E16 highway passes through the village as part of the transit route between Bergen and Oslo.