Canada–United States border
| Canada–United States border | |
|---|---|
The Peace Arch at the border between Surrey, British Columbia, and Blaine, Washington | |
| Characteristics | |
| Entities | Canada United States |
| Length | 8,891 km (5,525 mi) |
| History | |
| Established | September 3, 1783 Signing of the Treaty of Paris at the end of the U.S War of Independence |
| Current shape | April 11, 1908 Treaty of 1908 |
| Treaties |
|
| Notes | See list of current disputes |
The border of the Canada and United States, called the Canada–United States border or officially known as the International Boundary, is the longest international border in the world shared between the same pair of countries. 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, including 2,475 kilometres (1,538 mi) shared with Alaska. It is Canada's only land border.