Canada–United States border

Canada–United States border
The Peace Arch at the border between Surrey, British Columbia, and Blaine, Washington
Characteristics
Entities
Length8,891 km (5,525 mi)
History
EstablishedSeptember 3, 1783
Signing of the Treaty of Paris at the end of the American War of Independence
Current shapeApril 11, 1908
Treaty of 1908
Treaties
NotesSee list of current disputes

There are two international borders between Canada and the United States: Canada's border with the northern tier of the contiguous United States to its south (6,416 kilometres (3,987 miles)), and with the U.S. state of Alaska to its northwest (2,475 kilometres (1,538 miles)). The section between Canada and the contiguous United States is the second-longest continuous international border in the world after the Kazakhstan–Russia border, and the two sections together form the longest border by total length.

The boundary (including boundaries in the Pacific coasts, Great Lakes, and Atlantic coasts) is 8,891 km (5,525 mi) long. The bi-national International Boundary Commission deals with matters relating to marking and maintaining the boundary, and the International Joint Commission deals with issues concerning boundary waters. The agencies responsible for facilitating legal passage through the international boundary are the Canada Border Services Agency (CBSA) and U.S. Customs and Border Protection (CBP).

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