Montana.
The western states in the 48 contiguous states that have the longest border with Canada are Washington and Montana. Washington shares a border with British Columbia, while Montana shares a border with Alberta, Saskatchewan, and British Columbia.
The countries with the longest land border are Canada and the United States. They share a border that is approximately 8,891 kilometers (5,525 miles) long.
The border between Canada and the United States is the longest international border in the world, stretching over 5,500 miles.
Canada has the longest border in the world, measuring about 8,891 kilometers (5,525 miles) long, shared with the United States.
Hawaii and Alaska do not share a land border with the contiguous United States. Hawaii is located in the Pacific Ocean, while Alaska is separated from the contiguous states by Canada.
The state with the longest east-west distance in the contiguous United States is California. It covers a vast area from the Pacific Ocean to the Nevada border, making it the longest state to traverse.
Montana
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In the west, the state of Montana has the longest linear border with Canada. In the east, the state of Michigan has the longest border, including the Great Lakes.
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.
Montana
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Montana
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No, Ontario has the longest border with Canada and the US.
The Pacific Ocean
Contiguous is an adjective describing things that share a common border, are touching, or things together in a sequence. Example: The United States and Canada share a contiguous border.