Canadian Provinces Bordering the Great Lakes: Only Two, Not Five

Only two Canadian provinces border the Great Lakes, not five as sometimes claimed:

• Ontario - Borders four Great Lakes: Superior, Huron, Erie, and Ontario (plus the connecting waterways)
• Québec - Borders Lake Ontario via the St. Lawrence River section

Manitoba, Saskatchewan, and Alberta are prairie provinces located far to the west, hundreds of kilometers from the Great Lakes basin. They drain into Hudson Bay (via the Nelson River system) and the Arctic Ocean (via the Mackenzie River system), not the Great Lakes-St. Lawrence system.

Ontario's Great Lakes shoreline is the longest freshwater coastline in the world, making the province central to Great Lakes ecology, economy, and water management.