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This is a list of the evolution of the borders of the colonies and later states of Australia. It lists each change to the internal and external borders of Australia before and after Federation.

Map showing the territorial evolution of Australia.


7 February 1788

The colony of New South Wales is founded. New South Wales, according to Arthur Phillip's amended Commission dated 25 April 1787, includes "all the islands adjacent in the Pacific Ocean" and running westward to the 135th meridian east.[1] This included the islands of New Zealand. When drawing up the territorial boundaries of the colony of New South Wales, established in 1788, the British government set its western boundary at the meridian of 135º East of Greenwich, as it appeared on Melchisédech Thévenot's chart, Hollandia Nova‒‒Terre Australe, published in Relations de Divers Voyages Curieux (Paris, 1663).[2]


Macquarie Island is annexed by New South Wales

16 July 1825

File:Australian states history 02.gif
New South Wales' western border is extended to 129° E.[1]
3 December 1825
The colony of Van Diemen's Land is proclaimed.[1]

2 May 1829

File:Australian states history 03.gif
Swan River Colony is declared by Charles Fremantle for Britain.[1][3]

6 February 1832

Swan River Colony has its name changed to Western Australia.[1]

28 December 1836

File:Australian states history 05.gif
The colony of South Australia is proclaimed with its western border set at 132° E.[1]

21 May 1840

New Zealand is formally annexed to New South Wales.

16 November 1840

The colony of New Zealand is proclaimed by Letters Patent. Although not represented on a map here, New South Wales was significantly reduced in size by this proclamation. Separation was effected on 3 May 1841.

17 February 1846

The colony of North Australia was proclaimed by Letters Patent on 17 February. This was all of New South Wales north of 26° S.

15 April 1847

The colony of North Australia was revoked and reincorporated into New South Wales.

1 July 1851

File:Australian states history 08.gif
The colony of Victoria is proclaimed.[1]

1 January 1856

Van Diemen's Land name is changed to Tasmania.[1]

6 June 1859

The colony of Queensland is proclaimed by Letters Patent, with its western border set at 141° E, and settlement began on 10 December that year.[1]


South Australia border changed from 132° E to 129° E.[1]


Queensland's western border is moved to 139° E.[1]

6 July 1863

That part of New South Wales to the north of South Australia was annexed to South Australia by Letters Patent.[1]


Macquarie Island is transferred from New South Wales to Tasmania.


1 January 1901

The Commonwealth of Australia was formed, uniting the British colonies of New South Wales, Queensland, South Australia, Tasmania, Victoria, and Western Australia. Note that the Northern Territory was under South Australian administration at Federation.[1]

1 January 1911

The Federal Capital Territory was created within New South Wales, and the Northern Territory was split off from South Australia.[1]

12 July 1915

The coastal area now known as the Jervis Bay Territory is added to the Federal Capital Territory.

1 March 1927

The Northern Territory was split into the territories of North Australia and Central Australia.

12 June 1931

File:Australian states history 17.gif
North Australia and Central Australia were reunited as the Northern Territory.

29 July 1938

File:Australian states history 18.gif
The Federal Capital Territory's name is changed to the Australian Capital Territory.[1]

11 May 1989

File:Australian states history 19.gif
The Jervis Bay Territory becomes Australia's third mainland territory when the Australian Capital Territory is granted self government.

External Territories

1 July 1914

Norfolk Island is transferred from New South Wales to the Commonwealth of Australia

23 July 1931

Ashmore Island and the Cartier Islands are transferred from Britain to Australia

13 June 1933

The Australian Antarctic Territory is transferred from Britain

26 June 1947

Heard Island and the McDonald Islands are transferred from Britain

23 November 1955

The Cocos (Keeling) Islands are transferred from Singapore to Australia

1 October 1958

Christmas Island is transferred from Britain

30 September 1969

The Coral Sea Islands Territory is transferred from Queensland to the Commonwealth of Australia

Former External Territories

See also


  1. ^ a b c d e f g h i j k l m n o "A Nation sub-divided". Australian Heritage. Heritage Australia Publishing. 2011. Retrieved 2011-01-07.
  2. ^ Sir Joseph Banks, 'Draft of proposed Introduction to Captn Flinders Voyages', November 1811; State Library of New South Wales, The Papers of Sir Joseph Banks, Series 70.16; quoted in Robert J. King, "Terra Australis, New Holland and New South Wales: the Treaty of Tordesillas and Australia", The Globe, no.47, 1998, pp.35–55, p.35.
  3. ^ Acting under instructions from England, Captain Fremantle took possession of the Swan River, to found a new colony; and formally laid claim to "all that part of New Holland which is not included within the territory of New South Wales".