Major Rivers Near Ontario, Canada

Key Waterways Bordering or Crossing Ontario

• Ottawa River
• St. Lawrence River
• Niagara River
• Detroit River
• Rainy River
• Albany River
• Moose River
• Severn River
• Nelson River
• Hayes River
• Winisk River
• Attawapiskat River

Significance

These rivers define borders, generate hydroelectric power, support ecosystems, and enable transportation across Canada’s most populous province.