States that border Canada: Alaska, Washington state, Idaho, Montana, North Dakota, Minnesota, Michigan, New York, Vermont, New Hampshire, and Maine
Canadian provinces and territories that border the United States: Yukon Territory, British Colombia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, and New Brunswick
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The geographical 49th parallel is the "border" that separates Canada from the United States.
There are many locations in Canada that have borders to the United States. These include Surrey British Columbia in the West, to Saint-Benard-de-Lacolle, Quebec in the East.
The 49th parallel of latitude forms the border between Canada and the US from Lake of the Woods to the Georgia Strait. The 45th parallel of latitude also forms part of the border between Canada and the US along the northern boundaries of the states of New York, Vermont and New Hampshire.
At 8891 km, the border between Canada and the USA is the longest between any two countries, but a major section of that border (with Alaska) is not contiguous with the rest. The longest contiguous section of border between two countries in the world is between Russia and Kazakhstan, at 6846 km.
A border between USA and Canada. You can see it on a map of North America.
Us and Canada share the world's longest, undefended border of about 5,500 mmiles. People can illegally cross this border, but security is getting tighter.
an unprotected one......... =================== The Canada US border has been described as an "undefended" border, but it is by no means an "unprotected" one. Even the "undefended" nature of the border is now questioned by many.