| Heard Island and McDonald Islands (2005) | Heard Island and McDonald Islands (2002) | |
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| Elevation extremes | lowest point: Indian Ocean 0 m 
 highest point: Mawson Peak, on Big Ben 2,745 m  | 
				lowest point: Southern Ocean 0 m 
 highest point: Big Ben 2,745 m  | 
				
| Irrigated land | 0 sq km | 0 sq km (1998 est.) | 
| Land use | arable land: 0% 
 permanent crops: 0% other: 100% (2001)  | 
				arable land: 0% 
 permanent crops: 0% other: 100% (1998 est.)  | 
				
| Location | islands in the Indian Ocean, about two-thirds of the way from Madagascar to Antarctica | Southern Africa, islands in the Indian Ocean, about two-thirds of the way from Madagascar to Antarctica | 
| Maritime claims | territorial sea: 12 nm 
 exclusive fishing zone: 200 nm  | 
				exclusive fishing zone: 200 NM 
 territorial sea: 12 NM  | 
				
| Population | uninhabited (July 2005 est.) | uninhabited (July 2002 est.) | 
| Waterways | - | none |