List of countries and territories with the Union Jack displayed on their flag

This is a list of current countries and territories with a flag that incorporates the Union Flag. Five Commonwealth nations have the Union Flag on their national flag. The first Commonwealth country to drop the Union Flag was Canada in 1965, after adopting a new national flag. The most recent country to drop the Union Flag from its flag was South Africa in 1994, after adopting a new national flag. The only overseas territory without the Union Flag on its current flag is Gibraltar. The list also includes overseas territories, provinces and states.

Independent nations
After Fiji became an independent country from the United Kingdom there have been calls to change the flag of Fiji, but it has not been changed since.

Commonwealth realms
The Union Flag is an official ceremonial flag of Canada known as the Royal Union Flag.