Although Canada and the United States share the longest non-militarized border between two countries, there are five areas that are of disputed ownership.

• Machias Seal Island (Maine / New Brunswick)
• North Rock (Maine / New Brunswick)
• Strait of Juan de Fuca (Washington / British Columbia)
• Dixon Entrance (Alaska / British Columbia)
• Beaufort Sea (Alaska / Yukon)

The Canadian and United States governments also dispute the nature of the Northwest Passage. Canada claims the passage as part of its territorial waters, while the United States regards it as international waters.

Lists of places | Disputed territories | Disputed waters | Canada and the United States | Territorial disputes of the United States

Gebietsansprüche Kanada-USA