Great Lakes in Canada: Four of Five Share the Border

Four Great Lakes Touch Canada

All except Lake Michigan are partly in Canada (Ontario):

1. Lake Superior — north shore (ON), largest by area
2. Lake Huron — north/east shore (ON), includes Georgian Bay
3. Lake Erie — north shore (ON), shallowest, warmest
4. Lake Ontario — north shore (ON), smallest by area, outlet to St. Lawrence

Lake Michigan

Entirely within the United States (WI, IL, IN, MI). Connected to Huron via Straits of Mackinac (hydrologically one lake).

Canadian Shoreline

• Ontario borders all four
• Major cities: Thunder Bay (Superior), Sarnia (Huron), Windsor (Erie/Detroit R.), Toronto (Ontario), Kingston (Ontario/St. Lawrence)
• Water quality, fisheries, shipping managed jointly (IJC, Great Lakes Water Quality Agreement)