The borders of Brazil are the international borders that Brazil shares with neighbouring countries. Brazil has terrestrial boundaries with nine countries of South America, and with the French Department of Guiana. Brazil has borders with every country in South America with the exception of Chile and Ecuador, totalling 16,885 kilometres (10,492 mi). [1] Brazil has the world's third longest land border, behind China and Russia.
The lengths of the borders Brazil shares with different countries, running counter-clockwise around Brazil from French Guiana to Uruguay, are listed below: [1]
Brazil's coastline with the Atlantic Ocean is 7,491 km, which is more than twice the length of its border with Bolivia, the longest land border. [1]
With many of Brazil's borders defined by rivers, there are several water falls along the border. The most notable border water falls include the Iguazu Falls on the border with Argentina and Orinduik Falls on the border with Guyana.
Until 1982, the border with Paraguay contained the Guaíra Falls. The falls were submerged following the construction of the Itaipu Dam. [2]
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With 10 bordering countries forming a single incomplete ring around Brazil, the borders of Brazil include 9 triple points (also called tripoints) in which the borders of three countries join at a single point. A few of the triple points are notable:
 Brazil in 1534: Western border defined by the 49th meridian west |  Brazil in 1574: Western border defined by the 49th meridian west |
 Dutch Invasion |  Brazil in 1709 |
 Brazil in 1750 |  Brazil in 1778 |
 Brazil in 1817 |  Brazil in 1822: gained the province of Cisplatina and enlarged the province of Rio Grande do Sul |
 Brazil in 1851: lost the province of Cisplatina (which became Uruguay) |  Brazil in 1889: gained territories from Bolivia and Paraguay |
 Brazil 1943-present: gained the territory that comprises the State of Acre and enlarged the province of Amazonas |
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