Thirteen States Along the Border
A total of thirteen U.S. states share a border with Canada. The border between the United States and Canada is the longest international border in the world, so it is no surprise that it touches many states. The states stretch all the way across the continent, from the Atlantic side in the east to the Pacific side in the west, plus Alaska in the far northwest.
A Border of Many Kinds
The U.S.-Canada border is not all the same. In some places it is a clear line drawn across land. In other places it runs straight through the middle of the Great Lakes, the huge freshwater lakes shared by the two countries. Alaska, separated from the rest of the United States, has its own long border with Canada in the northwest.
A Famously Peaceful Frontier
The border between the United States and Canada is often described as one of the most peaceful and friendly borders in the world. People, goods, and trade move across it constantly. Many towns and cities sit close to the line, and the two countries cooperate closely to manage the enormous boundary they share.
Source
This article was written using information from Wikipedia.