Souris River
General data
- Name: Souris River
- Water system: Lake Winnipeg
- Water type: River
- Progression: Assiniboine River -> Red River of the North -> Lake Winnipeg -> Nelson River -> Hudson Bay -> Arctic ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: United States of America
The Souris River or Mouse River (as it is alternatively known in the U.S., a translation of its French name) is a river in central North America. Approximately 700 kilometres (400 mi) in length, it drains about 61,100 square kilometres (23,600 sq mi) in Canada and the United States.