Champsac (French pronunciation: [ʃɑ̃sak]; Occitan: Chamçac) is a commune in the Haute-Vienne department in the Nouvelle-Aquitaine region in western France, sitting near to both the Dordogne and Charente borders.

Before the 2015 territorial reform, it was part of the region Limousin.

The village is situated within the Dordogne-Limousin National Park.

It is also very near to other amenities such as supermarkets, châteaux, lakes, cycle paths, fishing spots, etc., and sits approximately 30 minutes south-west of Limoges – Bellegarde Airport.

The historic city of Limoges and towns/villages such as Rochechouart, Oradour-sur-Glane, Saint-Junien and Châlus are also close by.