List of Areas Disputed By Canada and The United States - Current Disputes

Current Disputes

• Machias Seal Island 44°30′10″N 67°06′10″W / 44.50278°N 67.10278°W / 44.50278; -67.10278 (Machias Seal Island) and North Rock 44°32′17″N 67°05′17″W / 44.53795°N 67.08805°W / 44.53795; -67.08805 (North Rock) (Maine / New Brunswick), also known as the "Grey Zone," is on the United States' side of the boundary but administered by Canada.
• Strait of Juan de Fuca 48°17′58″N 124°02′58″W / 48.29944°N 124.04944°W / 48.29944; -124.04944 (Strait of Juan de Fuca) (Washington / British Columbia) The middle-water line is the boundary, but the governments of both Canada and British Columbia disagree and support two differing boundary definitions that would extend the line into the Pacific Ocean to provide a more definite Exclusive Economic Zone (EEZ) boundary.
• Dixon Entrance 54°22′N 132°20′W / 54.367°N 132.333°W / 54.367; -132.333 (Dixon Entrance) (Alaska / British Columbia) is wholly administered by Canada as part of its territorial waters, but the US supports a middle-water line boundary, thereby providing the US more maritime waters. Canada claims that a 1903 treaty demarcation is the international maritime boundary, while the United States holds that the maritime boundary is an equidistant line between the islands that form the Dixon Entrance, extending as far east as the middle-water line with Hecate Strait to the south and Clarence Strait to the north.
• Yukon–Alaska dispute, Beaufort Sea 72°01′40″N 137°02′30″W / 72.02778°N 137.04167°W / 72.02778; -137.04167 (Beaufort Sea) (Alaska / Yukon) Canada supports an extension into the sea of the land boundary between Yukon and Alaska. The US does not, but instead supports an extended sea boundary into the Canadian portion of the Beaufort Sea. Such a demarcation means that a minor portion of Northwest Territories EEZ in the polar region is claimed by Alaska, because the EEZ boundary between Northwest Territories and Yukon follows a straight north-south line into the sea. US claims would create a triangular shaped EEZ for Yukon. This is mainly an Alaska-Yukon dispute.
• Northwest Passage; Canada claims the passage as part of its "internal waters" belonging to Canada, while the United States regards it as an "international strait" (a strait accommodating open international traffic).