The flag of Cuba was adopted on May 20, 1902.

By 1899 various movements to liberate Cuba from Spanish rule emerged, mainly among Cuban exiles in the USA (where New York became an active center of Cuban resistance). Anti-Spanish Cuban exiles under the leadership of Narciso López adopted a flag suggested by the poet Miguel Teurbe Tolón . His design, which later became the national flag, incorporated three blue stripes representing the three military districts of Spanish-dominated Cuba and two white stripes symbolizing the purity of the patriot cause. The red triangle stood for strength and constancy, but it may also have reflected Masonic influences (triangles are Masonic symbols for equality and were found in a number of other flags in the former Spanish empire). The white star in the triangle stood for independence. López carried this flag in battles at Cárdenas (1850) and Playitas (1851). Although the battles were unsuccessful, these were the first times the flag was raised in Cuba.

After the United States seized Cuba from Spain during the Spanish-American War, the Stars and Stripes flew from January 1, 1899, until May 20, 1902, when the Cuban national flag was hoisted as a symbol of independence and sovereignty. It has been used ever since, even after the communist revolution led by Fidel Castro was successful in seizing control of the country. Like the previous dictator Fulgencio Batista, Castro made use of a party flag in all public activities. Castro's 26th of July Movement created a flag equally divided in red and black, usually in horizontal stripes and often with inscriptions.

It is similar in design to the flag of Puerto Rico, only having the blue and red reversed.

National flags

List of national flags | Gallery of national flags

List of national coats of arms