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.
No state has both. Alaska has the longest State Border with Canada. Florida has the longest Atlantic shoreline.
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.
Maine.
Montana
Alaska is the US state with longest Canadian border.
Alaska is the US state which shares the longest border with Canada.
No, Ontario has the longest border with Canada and the US.
Alaska, as it shares a border with Canada that extends for about 1,538 miles.
Montana
Montana does.
Montana has a longer border than New York, but Alaska has the longest border.