Which Canadian Provinces Border the United States?

Eight of Canada's ten provinces share a land or water border with the United States. Only Newfoundland and Labrador and Prince Edward Island do not.

The Eight Border Provinces (West to East)

1. British Columbia – Land border with Washington, Idaho, Montana; marine border with Alaska.
2. Alberta – Land border with Montana (49th parallel).
3. Saskatchewan – Land border with Montana, North Dakota.
4. Manitoba – Land border with North Dakota, Minnesota.
5. Ontario – Water borders (Great Lakes, rivers) with Minnesota, Michigan, Ohio, Pennsylvania, New York. Longest provincial border.
6. Quebec – Land/water borders with New York, Vermont, New Hampshire, Maine.
7. New Brunswick – Land border with Maine. Only Atlantic province with land border.
8. Nova Scotia – Marine border with Maine (Bay of Fundy/Gulf of Maine).

Quick Facts

• Total land border: 8,891 km (5,525 mi) — world's longest international border.
• Most crossings: Ontario (14 major road crossings).
• Only province bordering Alaska: British Columbia (and Yukon Territory).
• No province borders only one U.S. state except Alberta (Montana only).

Note: The original source listed only five provinces, missing Ontario, Quebec, and Nova Scotia. The complete list is eight.