US-Canadian Border | Franklin County, New York
The Canada–United States border (French: Frontière entre le Canada et les États-Unis), officially known as the International Boundary, is the longest international border in the world between two countries. It is shared between Canada and the United States, the second and fourth largest countries by area, respectively. The terrestrial boundary (including small portions of maritime boundaries on the Atlantic, Pacific, and Arctic coasts, as well as the Great Lakes) is 8,891 kilometres (5,525 mi) long, of which 2,475 kilometres (1,538 mi) is with Alaska. Eight Canadian provinces and territories (Yukon, British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, and New Brunswick), and thirteen U.S. states (Alaska, Washington, Idaho, Montana, North Dakota, Minnesota, Michigan, Ohio, Pennsylvania, New York, Vermont, New Hampshire, and Maine) are located along the border.