The national flag of the United Arab Emirates (Arabic: علم دولة الإمارات العربية المتحدة) contains the Pan-Arab colours red, green, white, and black. It was designed in 1971 by Abdullah Mohammed Al Maainah, who was 19 years old at that time, and was adopted on 2 December 1971. The main theme of the flag's four colours is the unity of Arab nations. In 2008, there was a minor change to the Emblem.

Merchant ships may fly the alternative civil ensign, a red flag with the national flag in the canton. Emirates Airlines utilises the UAE flag as part of their livery.

All seven Emirates use the federal flag interchangeably as the flag of the emirate.