Cabo de Hornos Postal Codes: 6350000 | Antártica Chilena, Magallanes y de la Antártica Chilena

Key Facts

Cabo de Hornos is a commune located in the southernmost part of Chile's Antártica Chilena Province within the Magallanes y de la Antártica Chilena Region. Situated at the extreme southern tip of South America, this remote commune encompasses the legendary Cape Horn archipelago and extends southward to include the Diego Ramírez Islands, making it the southernmost commune in Chile and one of the most isolated inhabited places on Earth. Covering an area of approximately 15,854 square kilometers, Cabo de Hornos is characterized by its dramatic maritime landscape of rocky islands, treacherous waters, and harsh subpolar oceanic climate. The commune is divided into two main populated areas: Puerto Toro on Navarino Island, which holds the distinction of being the southernmost permanently inhabited settlement in the world, and the small naval station on Cape Horn Island. With a population of around 2,200 people, primarily concentrated in Puerto Williams (the provincial capital located within the commune), Cabo de Hornos serves as a critical gateway to Antarctic research and maritime navigation. The commune's strategic position at the meeting point of the Atlantic and Pacific Oceans has made it historically significant for global shipping routes, though modern vessels now primarily use the safer Strait of Magellan or Panama Canal. Accessing postal code information for Cabo de Hornos and its sub-regions is essential for maintaining communication with this remote but strategically important part of Chile.