The Juan Fernández Islands (Archipiélago Juan Fernández) are a sparsely inhabited series of islands in the South Pacific Ocean reliant on tourism and fishing. Situated off the coast of Chile, they are composed of three main volcanic islands: Robinson Crusoe, Alejandro Selkirk and Santa Clara. The group is part of Insular Chile.
The islands are primarily known for having been the home to the marooned sailor Alexander Selkirk for more than four years from 1704, which may have inspired Daniel Defoe's Robinson Crusoe. Most of the archipelago's present-day inhabitants reside on Robinson Crusoe Island, and mainly in the capital, San Juan Bautista, located at Cumberland Bay on the island's north coast.
The group of islands is part of Chile's Valparaíso Region (which also includes Easter Island) and, along with the Desventuradas Islands, forms one of the nine communes of Valparaíso Province. The islands are named after Juan Fernández, the explorer who discovered them in the 1570s.
Robinson Crusoe Island (), also known as Isla Más a Tierra, is located closest to the mainland of continental South America, and is surrounded by a number of islets, including Juanango, Viñilla, Los Chamelos, Los Claveles and El Verdugo.
Santa Clara (), lying southwest of Robinson Crusoe.
Alejandro Selkirk Island (), also known as Isla Más Afuera, is located further west.
Alejandro Selkirk is the largest of the Juan Fernández Islands at , and its highest peak, Cerro de Los Inocentes, is also the highest point of the archipelago at . The island's population was 57 in 2012. Robinson Crusoe is the second largest island in the archipelago at ; its highest peak, El Yunque, is . The population of Robinson Crusoe was 843 in 2012. Santa Clara is in area and reaches a height of . Santa Clara is uninhabited. The maximum elevations of Juan Fernández, for Robinson Crusoe and for Alejandro Selkirk, respectively, are high enough to cause the phenomenon known as Kármán vortex street, which can be seen from space.