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The Canada–United States border is the longest international border in the world. The boundary (including boundaries in the Great Lakes, Atlantic, and Pacific coasts) is 8,891 km (5,525 mi) long. The land border has two sections: Canada's border with the contiguous United States to its south, and with the U.S. state of Alaska to its west.
- Maine. The US state of Maine shares a 611-mile (983 km) long border with Quebec and New Brunswick, the third longest state boundary with Canada. Between 1838 and 1839, Maine and New Brunswick engaged in territorial disputes over the boundary.
- New Hampshire. New Hampshire shares a 58 mile (93 km) long border with Quebec. However, there is only one border crossing located at the terminals of the U.S. Route 3 in the town of Pittsburgh.
- Vermont. Vermont and Quebec share a 90 mile (145 km) long boundary. The Treaty of Paris established the boundary, but the Webster–Ashburton Treaty redefined it.
- New York. New York State shares a 445-mile (716 km) long boundary with Ontario and Quebec. The Treaty of Paris established the boundary in 1783 while the Webster–Ashburton Treaty 1842 revised the borderline.
Mar 2, 2018 · The U.S. shares international land borders with Canada and Mexico and sea borders with Bahamas and Cuba. Below is the map showing the nearest country border to everywhere in the United States. The United States – Canada border is the longest international border in the world between two countries.
Close. The Canada–United States border is the longest international border in the world. The boundary is 8,891 km (5,525 mi) long. The land border has two sections: Canada's border with the contiguous United States to its south, and with the U.S. state of Alaska to its west.
May 28, 2019 · The 49th Parallel is the longest undefended border in the world. The 5,525-mile-long border between Canada and the United States of America is the longest undefended international boundary in the world, but how did it come to be?
- Nancy Lebrun
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Jan 8, 2024 · Canada is bordered by non-contiguous US state of Alaska in the northwest and by 12 other US states in the south. The border of Canada with the US is the longest bi-national land border in the world. Canada is also bounded by the Arctic Ocean to the north, by the Atlantic Ocean to the east and the Pacific Ocean to the west.
Dec 17, 2018 · The border between the United States and Canada is the longest international border in the world. The border between the two countries is 5,525 miles (8,891 kilometers) long. Map showing the international border (purple) between the United States and Canada. Data: Natural Earth.
