The national flag of the United Kingdom is the Union Jack, also known as the Union Flag. The design of the Union Jack dates back to the Act of Union 1801, which united the Kingdom of Great Britain and the Kingdom of Ireland (previously in personal union) to create the United Kingdom of Great Britain and Ireland.

大不列颠及北爱尔兰联合王国 （英國）的 国旗 是 聯合傑克 （The Union Jack），又叫 聯合旗 （Union Flag）。 中文 通稱 米字旗，正式名稱 聯合王國旗 （Flag of the United Kingdom）現在的旗幟圖案始於1801年 大不列顛王國 與 愛爾蘭王國 的合併 [1]，設計融合了代表 英格蘭 的 聖喬治十字 、代表 蘇格蘭 的 聖安德魯十字 以及代表 愛爾蘭 的 聖派翠克十字，唯獨沒有任何代表 威爾斯 的要素，因為威爾斯的旗幟是在被英格蘭兼并以後才設計的。 英国国旗的标准比例是1:2， …

The current UK flag (the Union Jack) holds symbolism from England, Scotland, and Northern Ireland, but lacks any symbolism of the only other UK nation in Wales. Therefore, it has been suggested the Union Jack be redesigned to include representation of Wales or a completely new or alternate flag be used.

The Union Jack[2][3] or Union Flag is the de facto national flag of the United Kingdom. The Union Flag was also used as the official flag of several British colonies and dominions before they adopted their own national flags.

flag of the United Kingdom red, white, and blue flag in which are combined the Crosses of St. George (England), St. Andrew (Scotland), and St. Patrick (Ireland). Initially the Union Flag was called a jack only when it was flown at the bowsprit of British naval vessels, but it was commonly called the Union Jack by the late 17th century; now ...

大不列颠及北爱尔兰联合王国国旗，旗帜图案像汉字的“米”字，中国人称为“米字旗”；该旗叫做“The Union Jack”或“The Union Flag”；该旗呈横长方形，长与宽之比为2:1；由深蓝底色和红、白色“米”字组成。

Flag of the United Kingdom - also known to the British as a Union Jack, has been used since 1603 when the Scottish King James VI became the king of England. The symbolism of the flag expresses the linkage between England, Scotland, and Wales. The central theme is a red cross of St. George, who is considered to be the patron of England.

The Union Flag is the national flag of the United Kingdom. It has had the same design since the Act of Union 1800. The flag is made from the flags of the kingdoms of England, Scotland, and Ireland. The common ratio that used by the government and other institutions are 1:2.

The table contains images of the United Kingdom’s national flag and of the flags of the four constituent units and three crown possessions. Larger images of the flags can be viewed by clicking on individual flags.

The National Flag of the United Kingdom (Union Jack) features a blue background with the centered red cross edged in white; the country uses Pound sterling as its official currency; and its national anthem is "God Save the Queen"