The Anguilla flag consists of the British flag and the coat of arms of Anguilla. The coat of arms includes three dolphins which stand for friendship, wisdom, and strength. The coat of arms represents the Dolphin Flag of Anguilla that was adopted on September 29, 1967. This older flag was established after Anguilla (then part of Saint Christopher-Nevis-Anguilla) unilaterally declared independence from Great Britain. It was used until March 19, 1969, when British rule was restored.

The Anguilla flag is Anguilla's third flag. The island's first design was a red and blue flag featuring the name of the island in yellow and two mermaids. Variations of this flag were also widely used, with some substituting red for purple and others not even bearing the name of Anguilla.