Phú Quốc is the largest island in Vietnam. Previously organized as Phú Quốc City, it was Vietnam's first island municipality. The island has a total area of 575 km2 (222 sq mi) and a permanent population of approximately 179,480 people in 2020. On June 16, 2025, Phú Quốc became one of the 13 newly established and re-organized special administrative zones of Vietnam, the only city to do so. Later o…