| Île Foch | |
| Location: | Indian Ocean |
| Archipelago: | Îles Kerguelen |
| Total Islands: | 1 |
| Major Islands: | Île Foch |
| Area Km2: | 206.0 |
| Rank: | 2nd (In the Kerguelen Islands) |
| Length Km: | 27.9 |
| Width Km: | 12.2 |
| Coastline Km: | 107 |
| Elevation M: | 687 |
| Highest Mount: | Pyramide mexicaine |
| Country: | France |
| Country Admin Divisions Title: | Terres australes et antarctiques françaises |
| Country Admin Divisions Title 1: | District |
| Country Admin Divisions 1: | Îles Kerguelen |
| Demonym: | Fochen |
| Population: | 0 |
Île Foch is one of the Kerguelen Islands situated near to the north coast of Grande Terre, the principal island.
It is separated from this main island by a narrow sea arm, the Tucker strait. It borders Île Saint-Lanne Gramont at the northwest, which is separated by the Baie de Londres. At the northeast point it borders Mac Murdo and Howe island.
With an area of 206km2, it is the second largest island in the archipelago. Its highest point, which has an elevation of 687m (2,254feet), is named .
Since it is the largest island in the archipelago with no introduced species (no rabbits, cats, mice or rats), Île Foch is used as a reference as to the original ecosystem of Kerguelen Island. To prevent any accidental introduction of species, access is highly regulated and restricted to scientific missions only.
The island, along with the neighbouring, and relatively large, islands of Île Saint-Lanne Gramont and Île Howe, as well as the smaller Île Mac Murdo, Île Briand, Îles Dayman and Îlots Hallet, have been identified by BirdLife International as an Important Bird Area (IBA) because of its value as a breeding site, especially for seabirds, with at least 29 species nesting in the IBA.[1]