The Saint-Georges river flows in the municipality of Sainte-Agathe-de-Lotbinière, in Lotbinière Regional County Municipality, in the administrative region of Chaudière-Appalaches, in Quebec, in Canada.

The main watersheds neighboring the Saint-Georges River are: The Saint-Georges river has its source on the east side of the village of Sainte-Agathe-de-Lotbinière.

This river flows on 2.8 kilometres (1.7 mi) towards the northwest, with a drop of 14 metres (46 ft), until its confluence.

[1] The Saint-Georges river empties on the south bank of the rivière du Chêne (Leclercville), at 3.1 kilometres (1.9 mi) (in direct line) northeast of the center of the village of Sainte-Agathe-de-Lotbinière.

The toponym Rivière Saint-Georges was formalized on August 8, 1977, at the Commission de toponymie du Québec.