The international land border between the United States and Canada is the longest in the world at almost 8,900 kilometers. It includes the border between Canada and the continental U.S. as well as the border between Alaska and northern Canada.
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Length of longest international land borders worldwide
(in kilometers)
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WorldAtlas. (August 10, 2019). Length of longest international land borders worldwide (in kilometers) [Graph]. In Statista. Retrieved June 20, 2025, from https://www.statista.com/statistics/1103985/border-length-between-countries/
WorldAtlas. "Length of longest international land borders worldwide (in kilometers)." Chart. August 10, 2019. Statista. Accessed June 20, 2025. https://www.statista.com/statistics/1103985/border-length-between-countries/
WorldAtlas. (2019). Length of longest international land borders worldwide (in kilometers). Statista. Statista Inc.. Accessed: June 20, 2025. https://www.statista.com/statistics/1103985/border-length-between-countries/
WorldAtlas. "Length of Longest International Land Borders Worldwide (in Kilometers)." Statista, Statista Inc., 10 Aug 2019, https://www.statista.com/statistics/1103985/border-length-between-countries/
WorldAtlas, Length of longest international land borders worldwide (in kilometers) Statista, https://www.statista.com/statistics/1103985/border-length-between-countries/ (last visited June 20, 2025)
Length of longest international land borders worldwide (in kilometers) [Graph], WorldAtlas, August 10, 2019. [Online]. Available: https://www.statista.com/statistics/1103985/border-length-between-countries/
