Phú Quốc is the largest island in Vietnam. Phú Quốc and nearby islands, along with distant Thổ Chu Islands, is part of Kiên Giang Province as Phú Quốc District, the district has a total area of 574 square kilometres (222 sq mi) and a permanent population of approximately 103,000. Located in the Gulf of Thailand, the district of Phú Quốc includes the island proper and 21 smaller islets. The district seat, Dương Đông, is located on the west coast, and is also the largest town on the island. The economy is centered on fishing, agriculture and a fast-growing tourism sector.