List of Land Borders With Dates of Establishment - South America

South America

Argentina-Brazil

• Puerto Iguazú-Foz do Iguaçu
  • 1814 Misiones is claimed by Argentina, border between Argentina and Portugal
• Posadas-Pato Branco
  • 1927 Border between Argentina and Brazil is settled
• Posadas-Porto Alegre
  • 1814 Misiones is claimed by Argentina, border between Argentina and Portugal
• Corrientes-Santa Maria
  • 1820 After the division of the territory of the Liga Federal, border between the United Provinces of South America (Argentina) and Portugal

Argentina-Bolivia

• • 1825 Bolivian independence from the United Provinces of South America
  • 1925 Final border treaty

Argentina-Chile

• Salta-Antofagasta
  • 1884 Chile conquers the Bolivian Antofagasta Region
  • 1899 Border settled
• Mendoza-Santiago de Chile
  • 1810 The United Provinces of South America (Argentina) becomes independent, border between Argentina and Spain
  • 1818 Chile becomes independent with help from Argentina
• From Comodoro Rivadavia-Coihaique to Ushuaia-Punta Arenas
  • 1881 Boundary treaty of 1881 between Chile and Argentina

Argentina-Paraguay

• • 1870 Border established after the Paraguayan War

Argentina-Uruguay

• • 1820 Liga Federal is dissolved and the United Provinces of South America annexes the western provinces, creating today's border
  • 1821 The remainder of Liga Federal is annexed by the United Kingdom of Portugal, Brazil and the Algarves
  • 1825 Uruguay declares independence
  • 1828 Uruguayan independence is recognized

Bolivia-Brazil

• La Paz-Rio Branco
  • 1903 Treaty of Petropolis, Bolivia cedes Acre to Brazil
• Riberalta-Bom Comérico
  • 1867 Bolivia cells northern Acre to Brazil
• La Paz-Porto Velho
  • 1822 Brazilian independence, border between Brazil and Spain
  • 1825 Bolivian independence
• Santa Cruz-Cuiabá
  • 1867 Bolivia cells parts of eastern Bolivia to Brazil
  • 1927 Final border treaty

Bolivia-Chile

• Julaca-Antofagasta
  • 1884 Chile conquers the Bolivian Antofagasta Region
• La Paz-Arica
  • 1825 Bolivian independence, border between Bolivia and Peru
  • 1880 Arica is conquered by Chile

Bolivia-Paraguay

• • 1938 Chaco War ends with a truce, the current border created
  • 2009 A final treaty is signed to clearly mark the border

Bolivia-Peru

• La Paz-Arequipa
  • 1824 Spanish defeated in Peru, border between Peru and Spain
  • 1825 Bolivian independence
• Riberalta-Cuzco
  • 1909 Border settled

Brazil-Colombia

• • 1907 Treaty of Bogotá, Brazil and Colombia agree on most of the border
  • 1928 The Tratado de Límites y Navegación Fluvial is signed, settling the border

Brazil-France

• • 1713 The Treaty of Utrecht creates a border between France and Portugal.
  • 1822 Brazil obtains independence

Brazil-Guyana

• Santarém-Georgetown
  • 1822 Brazilian independence, border between Brazil and the United Kingdom
  • 1966 Guyana becomes independent
• Boa Vista-Georgetown
  • 1904 Italy arbiters in a border dispute, border between Brazil and the British Empire
  • 1966 Guyana becomes independent
• Boa Vista-Imbaimadai
  • 1822 Brazilian independence, border between Brazil and the United Kingdom
  • 1966 Guyana becomes independent

Brazil-Paraguay

• Campo Grande-Forte Olimpo
  • 1870 Paraguay is defeated in the Paraguayan War and loses territory to Brazil, border between Brazil and the disputed Chaco area, claimed by both Bolivia and Paraguay
  • 1935 After the Chaco War
• Campo Grande-Asunción
  • 1870 Paraguay is defeated in the Paraguayan War and loses territory to Brazil
• Cascavel-Asunción
  • 1811 Paraguay becomes independent, border between Paraguay and Portugal
  • 1822 Brazilian independence

Brazil-Peru

• Eirunepé-Iquitos
  • 1851 Border agreement
• Rio Branco-Lima
  • 1909 Border agreement

Brazil-Suriname

• • 1906 Border between Brazil and the Netherlands defined in the Treaty of Limits
  • 1975 Suriname obtains independence

Brazil-Uruguay

• • 1825 Uruguay declares independence
  • 1828 Uruguay's independence is accepted by Brazil

Brazil-Venezuela

• • 1777 First Treaty of San Ildefonso is signed designating the border between Spain and Portugal
  • 1819 Gran Colombia becomes independent
  • 1822 Brazilian becomes independent
  • 1830 Venezuela becomes independent

Colombia-Ecuador

• • 1830 Ecuador becomes independent from Colombia
  • 1916 Final border treaty

Colombia-Panama

• • 1903 Panama becomes independent from Colombia

Colombia-Peru

• • 1922 Border agreement between Colombia and Peru, territory disputed with Ecuador
  • 1942 Ecuador loses a war versus Peru

Colombia-Venezuela

• • 1830 Venezuela becomes independent from Colombia

Ecuador-Peru

• Quito-Iquitos
  • 1942 After the Ecuadorian–Peruvian War, disputed
• Cuenca-Sullana
  • 1830 Ecuador becomes independent, disputed

France-Suriname

• • 17th century, border between France and the Netherlands.
  • 1975 Surinamese independence.

Guyana-Suriname

• Georgetown-Paramaribo
  • 1966 Guyana becomes independent, border between Guyana and the Netherlands
  • 1975 Suriname becomes independent
• Joli-Majoli
  • 1966 Guyana becomes independent, border between Guyana and the Netherlands
  • 1975 Suriname becomes independent, disputed

Guyana-Venezuela

• • 1899 Border settled between Venezuela and the British Empire
  • 1966 Guyana becomes independent, border disputed