Geography of Heard Island and McDonald Islands
| Location: | islands in the Indian Ocean, about two-thirds of the way from Madagascar to Antarctica |
| Geographic coordinates: | 53 06 S, 72 31 E |
| Map references: | Antarctic Region |
| Area: | total: 412 sq km land: 412 sq km water: 0 sq km |
| Area - comparative: | slightly more than two times the size of Washington, DC |
| Land boundaries: | 0 km |
| Coastline: | 101.9 km |
| Maritime claims: | territorial sea: 12 nm exclusive fishing zone: 200 nm |
| Climate: | antarctic |
| Terrain: | Heard Island - 80% ice-covered, bleak and mountainous, dominated by a large massif (Big Ben) and an active volcano (Mawson Peak); McDonald Islands - small and rocky |
| Elevation extremes: | lowest point: Indian Ocean 0 m highest point: Mawson Peak, on Big Ben 2,745 m |
| Natural resources: | fish |
| Land use: | arable land: 0% permanent crops: 0% other: 100% (2005) |
| Irrigated land: | 0 sq km |
| Natural hazards: | Mawson Peak, an active volcano, is on Heard Island |
| Environment - current issues: | NA |