Mitre Peninsula is the easternmost part of Isla Grande de Tierra del Fuego, located in the very southeast of the island, with its easternmost point, Cabo San Diego, 29 km northwest of Isla de los Estados, from which it is separated by Le Maire Strait.
The highest peak is Cerro Campana in the southern Montes Negros range with 1026 meters.
The area is part of Ushuaia municipality and the department of Tierra del Fuego Province (Argentina).
A former settlement is Bahía Thetis, on the namesake bay five kilometers west of Cabo San Diego.
This article about a place in Tierra del Fuego Province, Argentina is a stub.