Australia Post is the trading name of the Australian Government-owned Australian Postal Corporation (formerly the Australian Postal Commission).

The first Postmaster of New South Wales was an ex-convict, Isaac Nichols, who took the post in 1809 operating from his home in George Street, Sydney. His main job was to take charge of letters and parcels arriving by ship, to avoid the chaos of people rushing onto the ships as soon as they arrived at Sydney's wharves.

The Postal Act of 1825 allowed the governor to fix postage rates and appoint Postmasters outside Sydney, enabling the first organised postal service.

Postal services grew throughout the Australian colonies as they were established.

A regular Sydney-Melbourne overland service began in 1838, as did embossed covers (the world's second, after William Dockwra established the London Penny Post in 1680) prepaid postage^{[citation needed]}, and by 1849 uniform postal rates were established by agreement between the colonies. Monthly steamship sea mail to the United Kingdom was established in 1856. The separate colonies joined the Universal Postal Union in 1891.

Australia ( /əˈstreɪljə/), officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent as well as the island of Tasmania and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area. Neighbouring countries include Indonesia, East Timor and Papua New Guinea to the north; the Solomon Islands, Vanuatu and New Caledonia to the north-east; and New Zealand to the south-east.

For at least 40,000 years before European settlement in the late 18th century, Australia was inhabited by indigenous Australians, who belonged to one or more of roughly 250 language groups. After discovery by Dutch explorers in 1606, Australia's eastern half was claimed by Great Britain in 1770 and settled through penal transportation to the colony of New South Wales from 26 January 1788. The population grew steadily in subsequent decades; the continent was explored and an additional five self-governing Crown Colonies were established.