border
No, Ontario has the longest border with Canada and the US.
russia is the closest country and it does not touch the border of the US!!! :)
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.
The US-Canada border is the longest border in the world. It stretches for 8,891 km.
Zero inches; Canada and the US share the longest border in North America. where one ends, the other one begins.
US and Canada
canada
The United States and Canada share the longest land border between two sovereign countries at 8,893 km (5,525 mi). This border, however, is discontinuous and includes the Alaska–Canada border.The longest continuous land border is between Kazakhstan and Russia at 6,846 km (4,254 mi).
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.
they are only one thing us mexico and canada share.
Canada.
Between Canada and the US. ================================================================================ An open border is one that allows unrestricted entry and exit. The border between Canada and the US has been described as the world's longest "undefended" border, but it is not an "open" border. Even the "undefended" concept of the Canada-US border is now being questioned.