In vexillography, the canton is a rectangular emblem placed at the top left of a flag, usually occupying up to a quarter of a flag's area. The canton of a flag may be a flag in its own right. For instance, British ensigns have the Union Jack as their canton, as do their derivatives such as the national flags of Australia and New Zealand.
Following the practice of British ensigns, a canton sometimes contains a symbol of national unity, such as the blue field and white stars of the flag of the United States of America. In these cases, the canton may be called simply the union.[1]
The American flag's canton derives from Britain's use of the Union Jack in the flags of its possessions (including, historically, the Thirteen American Colonies). Subsequently, many New World nations (along with other later countries and regions, such as Liberia or Malaysia) that were inspired by the United States adopted flag elements that were inspired by the American flag. As a result, many extant uses of a prominent canton derive either from British territorial history, or American influence and inspiration.
The flag of the Republic of China (Taiwan) has a navy blue canton bearing a white sun with 12 triangular rays. (This flag's canton is also used as the Taiwanese naval jack and the Kuomintang's party flag.)
The flag of Togo has a red canton bearing a white five-pointed star.
The flag of Tonga has a white canton bearing a red Greek cross couped.
The flag of Tuvalu features the Union Flag in its canton.
The flag of the United States has 50 white five-pointed stars on a blue canton (a.k.a. union), standing for the country's 50 constituent states (This flag's canton is also used as United States Naval Jack/Jack of the United States).
The flag of Georgia has the state coat of arms in the canton, surrounded by 13 stars which, like the stripes on the US flag, represent the original 13 colonies.
Flag and coat of arms of Selangor in Malaysia is not a true canton, although the standard of the Sultan of Selangor, which derives from it, retains the upper left hoist as a distinct canton.
Flag of the New York City Police Department has a blue canton defaced with stars, representing the 23 original municipalities that combined to form modern day NYC, and one for NYC itself.
A Soviet-era flag for Georgia, It was the only Soviet Union Republic flag with the canton and in which the hammer and sickle were not gold in color.
The November 1889 flag of Brazil had a blue canton defaced with 21 white stars.
The first version of the flag of the Confederate States featured a canton defaced with stars, with the stars representing its claimed constituent states
Subsequent flags of the CS incorporated a star-defaced saltire (known as the "Confederate Battle Flag") in their cantons.
The flag of the Orange Free State had a canton with a horizontal triband of red, white, and blue (e.g. the Dutch flag) in it.
The national flag of Texas from 1835 to 1839 had a blue canton, defaced with a single star.
Naval ensign of Serbia and Montenegro from 1992 to 2006, which had a canton with a horizontal triband of blue, white, and red (e.g. the Serbia and Montenegro national flag) in it.
Yugoslav naval ensign from 1949 to 1993, which had a canton consisting of a horizontal triband of blue, white, and red, defaced with a star and wreath.
Flag of the SR BiH, which had a canton consisting of the Yugoslav flag.