Swan River Colony in the context of James Stirling (Australian governor)

New South Wales (commonly abbreviated as NSW) is a state on the east coast of Australia. It borders Queensland to the north, Victoria to the south, and South Australia to the west. Its coast borders the Coral and Tasman Seas to the east. The Australian Capital Territory and Jervis Bay Territory are enclaves within the state. New South Wales' state capital is Sydney, which is also Australia's most populous city. In December 2024, the population of New South Wales was over 8.5 million, making it Australia's most populous state. Almost two-thirds of the state's population, 5.3 million, live in the Greater Sydney area.

The Colony of New South Wales was founded as a British penal colony in 1788. It originally comprised more than half of the Australian mainland with its western boundary set at 129th meridian east in 1825. The colony then also included the island territories of Van Diemen's Land, Lord Howe Island, and Norfolk Island. During the 19th century, most of the colony's area was detached to form separate British colonies that eventually became the various states and territories of Australia. The Swan River Colony (later called the Colony of Western Australia) was never administered as part of New South Wales.

The history of Australia from 1788 to 1850 covers the early British colonial period of Australia's history. This started with the arrival in 1788 of the First Fleet of British ships at Port Jackson on the lands of the Eora, and the establishment of the penal colony of New South Wales as part of the British Empire. It further covers the European scientific exploration of the continent and the establishment of the other Australian colonies that make up the modern states of Australia.

After several years of privation, the penal colony gradually expanded and developed an economy based on farming, fishing, whaling, trade with incoming ships, and construction using convict labour. By 1820, however, British settlement was largely confined to a 100-kilometre (62 mi) radius around Sydney and to the central plain of Van Diemen's land. From 1816, penal transportation to Australia increased rapidly and the number of free settlers grew steadily. Van Diemen's Land became a separate colony in 1825, and free settlements were established at the Swan River Colony in Western Australia (1829), the Province of South Australia (1836), and in the Port Philip District (1836). The grazing of cattle and sheep expanded inland, leading to increasing conflict with Aboriginal people on their traditional lands.

Perth (Nyungar: Boorloo) is the capital city of Western Australia. It is the fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth as of 2023. The world's most isolated major city by certain criteria, Perth is part of the South West Land Division of Western Australia, with most of Perth's metropolitan area on the Swan Coastal Plain between the Indian Ocean and the Darling Scarp. The city has expanded outward from the original British settlements on the Swan River, upon which its central business district and port of Fremantle are situated.

Perth was founded by Captain James Stirling in 1829 as the administrative centre of the Swan River Colony. The city is situated on the traditional lands of the Whadjuk Noongar people, where Aboriginal Australians have lived for at least 48,000 years. Perth was named after the city of Perth in Scotland. Initially established as a free settlement, the colony accepted transported convicts from 1850 to supply labour for public works and construction. Perth was proclaimed as a city by Queen Victoria in 1856. Substantial population growth occurred during the late 19th-century Western Australian gold rushes, and the city has continued to expand, particularly after World War II due to a high net migration rate. Post-war immigrants were predominantly from the British Isles and Southern Europe, while more recent arrivals see a growing population of Asian descent. During the late 20th and early 21st centuries, a series of mining booms in various regions of Western Australia propelled Perth into the role of the regional headquarters for significant mining operations. It became Australia's fourth-most populated city in 1984, overtaking Adelaide.

Between 1788 and 1868 the British penal system transported about 162,000 convicts from Great Britain and Ireland to various penal colonies in Australia.

The British Government began transporting convicts overseas to American colonies in the early 18th century. After trans-Atlantic transportation ended with the start of the American Revolution, authorities sought an alternative destination to relieve further overcrowding of British prisons and hulks. Earlier in 1770, James Cook had charted and claimed possession of the east coast of Australia for Great Britain. Seeking to pre-empt the French colonial empire from expanding into the region, Great Britain chose Australia as the site of a penal colony, and in 1787, the First Fleet of eleven convict ships set sail for Botany Bay, arriving on 20 January 1788 to found Sydney, New South Wales, the first European settlement on the continent. Other penal colonies were later established in Van Diemen's Land (Tasmania) in 1803 and Queensland in 1824. Western Australia – established as the Swan River Colony in 1829 – initially was intended solely for free settlers, but commenced receiving convicts in 1850. South Australia and Victoria, established in 1836 and 1850 respectively, officially remained free colonies. However, a population that included thousands of convicts already resided in the area that became known as Victoria.

The first colonies of the British Empire on the continent of Australia were the penal colony of New South Wales, founded in 1788, and the Swan River Colony (later renamed Western Australia), founded in 1829. Over the next few decades, the colonies of New Zealand, Queensland, South Australia, Van Diemen's Land (later renamed Tasmania), and Victoria were created from New South Wales, as well as an aborted Colony of North Australia. On 1 January 1901, these colonies, excepting New Zealand, became states in the Commonwealth of Australia. Since federation, the internal borders have remained mostly stable, except for the creation of some territories with limited self-government: the Northern Territory from South Australia, to govern the vast, sparsely populated centre of the country; the split of the Northern Territory into Central Australia and North Australia, and then the quick merger of those back into the Northern Territory; and the Australian Capital Territory, a federal district ceded from New South Wales.

Outside of the continent, Queensland attempted an expansion into New Guinea, but British authorities rejected this; the claim would later be made a British protectorate and ceded to Australia. The League of Nations mandated northeast New Guinea to Australia after World War I, as well as Nauru, which was placed under joint Australian-British-New Zealand jurisdiction. These mandates (and, later, United Nations trust territories) became the independent nations of Nauru and Papua New Guinea in the mid-20th century. Australia has also obtained several small island territories, mainly from earlier British colonies, and has a large claim on Antarctica.

Fremantle (/ˈfriːmæntəl/; Nyungar: Walyalup) is a port city in Western Australia located at the mouth of the Swan River in the metropolitan area of Perth, the state capital. Fremantle Harbour serves as the port of Perth. The Western Australian vernacular diminutive for Fremantle is Freo.

Prior to British settlement, the indigenous Noongar people inhabited the area for millennia, and knew it by the name of Walyalup ("place of the woylie"). Visited by Dutch explorers in the 1600s, Fremantle was the first area settled by the Swan River colonists in 1829, and is named after Captain Charles Fremantle, an English naval officer who claimed the west coast of New Holland as British territory. The settlement struggled in its first decades, and in 1850, with the advent of penal transportation to the colony, Fremantle became Australia's primary destination for convicts. The convict-built Fremantle Prison operated long after transportation of convicts ended in 1868, and is now a World Heritage Site.

Albany (/ˈælbəni/ AL-bən-ee; Nyungar: Kinjarling) is a port city in the Great Southern region in the Australian state of Western Australia, 418 kilometres (260 mi) southeast of Perth, the state capital. The city centre is at the northern edge of Princess Royal Harbour, which is a part of King George Sound. The central business district is bounded by Mount Clarence to the east and Mount Melville to the west. The city is in the local government area of the City of Albany. While it is the oldest colonial, although not European, settlement in Western Australia – predating Perth and Fremantle by over two years – it was a semi-exclave of the Colony of New South Wales for over four years until it was made part of the Swan River Colony.

The settlement was founded on 26 December 1826 as a military outpost of New South Wales for the purpose of forestalling French ambitions in the region. To that end, on 21 January 1827, the commander of the outpost, Major Edmund Lockyer, formally took possession for the British Crown of the portion of New Holland not yet claimed by the Crown; that is, the portion west of the 129th meridian east, with the portion east already being claimed collectively by the Crown as New South Wales and Van Diemen's Land. During the last decade of the 19th century, the town served as a gateway to the Eastern Goldfields. For many years, it was the colony's only deep-water port, having a place of eminence on shipping services between Britain and its Australian colonies. The opening of the Fremantle Inner Harbour in 1897, however, saw its importance as a port decline, after which the town's industries turned primarily to agriculture, timber and later, whaling.