Borders of Brazil
The borders of Brazil are the international borders that Brazil shares with neighboring countries. Brazil has borders with ten countries, every country in South America with the exception of Chile and Ecuador, totaling. Brazil has the world's third longest land border, behind China and Russia.
Bordering countries
The lengths of the borders Brazil shares with different countries, running counter-clockwise around Brazil from French Guiana to Uruguay, are listed below:| Country | Length | Bordering Brazilian states | Border features | Border crossings | Article link |
| ' | 730 | Amapa | Oyapock | Oyapock River Bridge | Brazil–France border |
| ' | 593 | Amapa, Para | Defined by the Treaty of Limits as the drainage divide between the Amazon basin to the south, and the basins of the rivers flowing north to the Atlantic Ocean | ||
| ' | 1606 | Para, Roraima | Takutu River, Ireng River | Takutu River Bridge | |
| ' | 2200 | Amazonas, Roraima | Highway BR-174 near the Brazilian city Pacaraima | Brazil–Venezuela border | |
| ' | 1644 | Amazonas | Japurá River, Apaporis River, Traíra River, Papurí River, Vaupés River, Içana River, Rio Cuiari | The adjoining Colombian city Leticia and the Brazilian city Tabatinga | Brazil–Colombia border |
| ' | 2995 | Acre, Amazonas | Acre River, Javary River, Amazon River, Santa Rosa River, Purus River, 10th parallel south | Brazil-Peru Integration Bridge | Brazil–Peru border |
| ' | 3423 | Acre, Mato Grosso, Mato Grosso do Sul, Rondônia | Paraguay River, Canal Tamengo, Mandioré Lake, Madeira River, Mamoré River, Abuna River, Acre River |
| Bolivia–Brazil border |
| ' | 1365 | Mato Grosso do Sul, Paraná | Paraná River, Itaipu Lake, Apa River, Paraguay River |
| Brazil–Paraguay border |
| ' | 1261 | Paraná, Rio Grande do Sul, Santa Catarina | Uruguay River, Pepiri-Guazu River, San Antonio River, Iguazu River, Iguazu Falls |
| Argentina–Brazil border |
| ' | 1068 | Rio Grande do Sul | Chuí Stream, Highway 19, Lagoon Mirim, Jaguarão River, San Luis River, Quaraí River | Brazil-Uruguay border |
Border disputes
With Bolivia
- Isla Suárez, or Ilha de Guajará-mirim, a river island on the Mamoré River is claimed by both Bolivia and Brazil.
With Uruguay
- A triangular region, named Rincão de Artigas in Portuguese, is controlled by Brazil and claimed by Uruguay. The dispute is due to a disagreement as to where a stream known as Arroyo de la Invernada begins and where it ends.
- Brazilian Island, a river island at the junction of the Quaraí River and the Uruguay River on the border between Argentina, Brazil, and Uruguay is claimed by both Uruguay and Brazil. Brazil has de facto control of it.
Water falls
Until 1982, the border with Paraguay contained the Guaíra Falls. The falls were submerged following the construction of the Itaipu Dam.
Triple points
With 10 bordering countries forming a single incomplete ring around Brazil, the borders of Brazil include 9 triple points in which the borders of three countries join at a single point. A few of the triple points are notable:- Mount Roraima: The tripoint of Brazil, Guyana and Venezuela. Due to a border dispute between Venezuela and Guyana, Venezuela does not recognize this point as the tripoint.
- Tres Fronteras: The tripoint of Brazil, Peru, and Colombia.
- Assis Brasil, Bolpebra, Iñapari: The tripoint of Brazil, Bolivia, and Peru.
- Triple Frontier: The tripoint of Brazil, Argentina, and Paraguay.
- Brazilian Island: The tripoint of Brazil, Argentina, and Uruguay. Due to a border dispute between Brazil and Uruguay over the river island, the exact position of the tripoint is in dispute.