Saint Francis River (Canada–United States)
General data
- Name: Saint Francis River (Canada–United States)
- Water system: Atlantic Ocean
- Water type: River
- Progression: Saint John River (Bay of Fundy) -> Bay of Fundy -> Gulf of Maine -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
The St. Francis River (French: Rivière Saint-François) is a river roughly 75 miles (120 km) long, which forms part of the Canada–United States border.