The rivière du Bois Clair (in English: light wood river) is a tributary of the east bank of the rivière du Chêne which flows on the south shore of the St. Lawrence River.

The Bois Clair river flows in the municipalities of Sainte-Croix-de-Lotbinière and Saint-Édouard-de-Lotbinière, in the Lotbinière Regional County Municipality, in the administrative region of Chaudière-Appalaches, Quebec, Canada.

This area also forms the head of the Barbin stream flowing to the north to the St. Lawrence River and a stream flowing east to the Petit Saut River.

From its head area, the Bois Clair river "flows over 13.3 kilometres (8.3 mi) with a drop of 50 metres (160 ft), divided into the following segments: The Bois Clair river "flows on the east bank of the rivière du Chêne in Saint-Édouard-de-Lotbinière.

This confluence is located opposite the rang du Portage of Leclercville, at 0.7 kilometres (0.43 mi) downstream of the Chêne River bridge (route 226), south-east of the village of Leclercville and south of the village of Lotbinière.