The Union Jack (Union Flag) is the national flag of the United Kingdom alone. However, it appears as a component in the flags of several other nations and territories due to historical ties.
The Union Jack is incorporated into the flags of territories such as Bermuda, Gibraltar, the Falkland Islands, and others, typically as a canton (upper-left quadrant). Crown dependencies like Guernsey and Jersey also feature it in some official flags.
Several sovereign states that were formerly part of the British Empire retain the Union Jack in their national flags, including:
In these flags, the Union Jack symbolizes historical connection to the UK, while the remaining design elements represent local identity.