[5] Damgan is a coastal town located on the south coast of Brittany.

The town is located 20 km (12 mi) southeast of Vannes.

The river Penerf forms a natural boundary to the west.

Historically Damgan belongs to Vannetais and Lower Brittany.

As of 2020, 73.5% of the properties are holiday homes,[8] the highest percentage in Morbihan.