| Hornos Island | |
| Native Name: | Isla Hornos |
| Map: | Tierra del Fuego |
| Coordinates: | -55.9441°N -67.2809°W |
| Archipelago: | Tierra del Fuego |
| Waterbody: | Pacific Ocean / Atlantic Ocean |
| Area Km2: | 25.1 |
| Country: | Chile |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Magallanes |
| Country Admin Divisions Title 1: | Province |
| Country Admin Divisions 1: | Antártica |
| Country Admin Divisions Title 2: | Commune |
| Country Admin Divisions 2: | Cabo de Hornos |
| Population: | 5 (2019) |
| Additional Info: | NGA UFI= -884347 |
Hornos Island (Spanish; Castilian: Isla Hornos) is a Chilean island at the southern tip of South America. The island is mostly known for being the location of Cape Horn. It is generally considered South America's southernmost island, but the Diego Ramírez Islands are farther south. The island is one of the Hermite Islands, part of the Tierra del Fuego archipelago.
The Chilean Navy maintains a station on the island, consisting of a residence, utility building, chapel, and lighthouse. A short distance from the main station is a memorial, including a large sculpture featuring the silhouette of an albatross, in honour of the sailors who died while attempting to "round the Horn".
The island is within the Cabo de Hornos National Park.
The island is dominated by Magellanic moorlands. Exposed locations are dominated by bunch grasses and short shrubs, low to the ground to avoid wind. Short trees found only in wind protected areas. The world's southernmost tree, a Nothofagus betuloides, is found on Hornos Island.[1]
The island has extensive penguin colonies along the coast, with no land predators present.
In 2019, the island had a population of five, consisting of the lighthouse keeper, his wife, and their three children.[2]
The island is also the southernmost extension of pre-industrial humanity. The world's southernmost archaeological site, consisting of harpoon points, butchered bones, and a hearth or cooking camp, was found in 2019.[3]
The composition of the island is mainly of Cretaceous granite with Jurassic volcanic rocks in the northwest. The lower areas of the island are filled with peat moss.
Mean temperature: 5.3 °C (41.54 °F)
Maximum temperature: 20.5 °C (68.9 °F) (February 1996)
Minimum temperature: −14.5 °C (5.9 °F) (June 1992)
Mean relative humidity: 86.4%
Mean wind direction: 264°
Mean wind speed: 84 knots
Maximum wind speed: 119 knots (August 1995)
Rainfall (yearly mean): 697.5 mm
Maximum rainfall: 1263.2 mm (1990)