The Flag of the Governor-General of Australia is an official flag of Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, 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...

 and is flown continuously in the presence of the Governor-General of Australia

Governor-General of Australia

The Governor-General of the Commonwealth of Australia is the representative in Australia at federal/national level of the Australian monarch . He or she exercises the supreme executive power of the Commonwealth...

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The flag has existed as three versions, the original flag used between 1902 and 1909 being a Union Flag

Union Flag

The Union Flag, also known as the Union Jack, is the flag of the United Kingdom. It retains an official or semi-official status in some Commonwealth Realms; for example, it is known as the Royal Union Flag in Canada. It is also used as an official flag in some of the smaller British overseas...

 defaced with a six pointed star, crowned, surrounded by ears of corn and a gold circlet. In 1909, following the addition of a seventh point to the Commonwealth Star

Commonwealth Star

The Commonwealth Star is a seven-pointed star symbolising the Federation of Australia which came into force on 1 January 1901....

 on the Australian Blue and Red Ensigns

Flag of Australia

The flag of Australia is a defaced Blue Ensign: a blue field with the Union Flag in the canton , and a large white seven-pointed star known as the Commonwealth Star in the lower hoist quarter...

, the star was changed to a seven-pointed star.

On 16 July 1936 the Governor-General adopted a new flag for official use in Australia. The flag has a 1:2 ratio, it has a royal blue

Royal blue

Royal blue describes both a bright shade and a dark shade of azure blue. It is said to have been invented by millers in Rode, Somerset, a consortium of which won a competition to make a dress for the British queen, Charlotte of Mecklenburg-Strelitz....

 background and in the centre of the flag there is a Royal Crest (a crowned lion standing on a St Edward's Crown) and the words "COMMONWEALTH OF AUSTRALIA" in dark blue letters on a gold scroll below the Crest. A similar design is used in most other Commonwealth realms

Commonwealth Realm

A Commonwealth realm is a sovereign state within the Commonwealth of Nations that has Elizabeth II as its monarch and head of state. The sixteen current realms have a combined land area of 18.8 million km² , and a population of 134 million, of which all, except about two million, live in the six...

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The flag is flown continuously wherever the Governor-General is in residence and is also used as a car flag.