Chile's Neighbors: The Nations and Oceans Bordering the World's Longest Country

Stretching 4,270 km (2,653 mi) along South America's western spine, Chile possesses a unique geography defined by dramatic borders. To the east, the towering Andes Mountains form a massive natural barrier with Argentina (the world's third-longest international border), Bolivia to the northeast, and Peru to the north. To the west, the nation's entire coastline—over 6,400 km—opens onto the vast Pacific Ocean.

A Land of Extremes

This geographic sandwich creates unparalleled diversity. The northern Atacama Desert, bordering Peru and Bolivia, is the driest non-polar place on Earth. The central Mediterranean valley hosts the capital, Santiago, and the bulk of the population. The southern fjords and channels, facing the Pacific and the Drake Passage, fragment into thousands of islands before ending at Cape Horn. Bolivia's loss of its coastal province to Chile in the War of the Pacific (1879–1884) remains a defining geopolitical scar, leaving Bolivia landlocked and Chile with its strategic Pacific gateway.