Ashmore and Cartier Islands

Introduction :: Ashmore and Cartier Islands


These uninhabited islands came under Australian authority in 1931; formal administration began two years later. Ashmore Reef supports a rich and diverse avian and marine habitat; in 1983, it became a National Nature Reserve. Cartier Island, a former bombing range, became a marine reserve in 2000.

Geography :: Ashmore and Cartier Islands


Southeastern Asia, islands in the Indian Ocean, midway between northwestern Australia and Timor island

Geographic coordinates

12 14 S, 123 05 E

Map references

Southeast Asia


total: 5 sq km

land: 5 sq km

water: 0 sq km

note: includes Ashmore Reef (West, Middle, and East Islets) and Cartier Island

Area – comparative

about eight times the size of the National Mall in Washington, DC

Land boundaries

0 km


74.1 km

Maritime claims

territorial sea: 12 nm

contiguous zone: 12 nm

continental shelf: 200-m depth or to the depth of exploitation

exclusive fishing zone: 200 nm




low with sand and coral


lowest point: Indian Ocean 0 m

highest point: Cartier Island 5 m

Natural resources


Land use

0% (2014 est.)

Natural hazards

surrounded by shoals and reefs that can pose maritime hazards

Environment – current issues

illegal killing of protected wildlife by traditional Indonesian fisherman, as well as fishing by non-traditional Indonesian vessels, are ongoing problems; sea level rise, changes in sea temperature, and ocean acidification are concerns; marine debris

Geography – note

Ashmore Reef National Nature Reserve established in August 1983; Cartier Island Marine Reserve established in 2000

People and Society :: Ashmore and Cartier Islands


no indigenous inhabitants

note: Indonesian fishermen are allowed access to the lagoon and fresh water at Ashmore Reef’s West Island; access to East and Middle Islands is by permit only

Government :: Ashmore and Cartier Islands

Country name

conventional long form: Territory of Ashmore and Cartier Islands

conventional short form: Ashmore and Cartier Islands

etymology: named after British Captain Samuel ASHMORE, who first sighted his namesake island in 1811, and after the ship Cartier, from which the second island was discovered in 1800

Dependency status

territory of Australia; administered from Canberra by the Department of Regional Australia, Local Government, Arts and Sport

Legal system

the laws of the Commonwealth of Australia and the laws of the Northern Territory of Australia, where applicable, apply


see Australia

Diplomatic representation in the US

none (territory of Australia)

Diplomatic representation from the US

none (territory of Australia)

Flag description

the flag of Australia is used

Economy :: Ashmore and Cartier Islands

Economy – overview

no economic activity

Military and Security :: Ashmore and Cartier Islands

Military – note

defense is the responsibility of Australia; periodic visits by the Royal Australian Navy and Royal Australian Air Force

Transportation :: Ashmore and Cartier Islands

Ports and terminals

none; offshore anchorage only

Transnational Issues :: Ashmore and Cartier Islands

Disputes – international

Australia has closed parts of the Ashmore and Cartier reserve to Indonesian traditional fishing; Indonesian groups challenge Australia’s claim to Ashmore Reef


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