Eidsfoss is a village in Holmestrand Municipality in Vestfold county, Norway.

The village is located at the southern end of the lake Eikeren, about 7 kilometres (4.3 mi) north of the village of Hof and about 20 kilometres (12 mi) southeast of the village of Vestfossen (in Øvre Eiker Municipality).

The village itself is mostly located on a small isthmus of land between two lakes, with a river connecting them.

The village is also the location of the historic Eidsfos Manor (Eidsfos Hovedgård) where the owners and manager of the ironworks maintained residence for over 250 years.

The manor house, which reflects both Renaissance and Baroque architecture, dates from approximately 1750.