Denmark, in fact it's the world oldest national flag.
malta
If the flag you are referring to is the original American flag, from when we first became a country, then the colors were ALWAYS red, white, and blue.
This depends on the exact context of country, and whether a country is still considered if it has been divided up, and later reunited. Egypt is often considered the oldest country, having been united around 3000 BC.
Ethiopia
The oldest flag still used by a nation, is the danish flag Dannebrog.
The Dutch tricolour flag is the oldest tricolour flag still in use.
Denmark, in fact it's the world oldest national flag.
china
It is the oldest NATIONAL flag still in use - it is not the oldest flag.
Denmark. The current design of the Danish flag, known as the Dannebrog, dates back to the 13th century and is considered the oldest unchanged national flag in the world.
Denmark's flag.
Denmark has the second oldest national flag in the world, called the Dannebrog. It has been in use for over 800 years, since the early 14th century.
Denmark's flag.
Denmark holds the record for having the oldest continuously used national flag in the world. The Dannebrog, as it's called in Danish, dates back to the 13th century and is one of the oldest flags still in use today.
Denmark's flag.
Denmark's flag, known as the Dannebrog, is the oldest continuously used national flag in the world. Legend has it that it fell from the sky during a battle in the early 13th century, leading to a Danish victory.