Phu Quoc is the largest island in Vietnam. The island is part of Kien Giang Province, has a total area of 574 square kilometres and a permanent population of approximately 85,000. The district of Phu Quoc includes the island proper and 21 smaller islets. The district seat, Duong Dong, is located on the west coast, and is also the largest town on the island. The economy is centered around fishing, agriculture and a fast-growing tourism sector; Phu Quoc being one of the most popular tourist destinations of Vietnam.

Located in the Gulf of Thailand, Phu Quoc island lies just off the Cambodian coast, 62 nautical miles (115 km; 71 mi) from Rach Gia, 8.1 nautical miles (15.0 km; 9.3 mi) from Kampot province of Cambodia, and nearly 290 nautical miles (540 km; 330 mi) from Laem Chabang, Thailand. Roughly triangular in shape the island is 50 kilometres (31 mi) long north to south and 25 kilometres (16 mi) east to west in the north at its widest. A mountainous ridge known as "99 Peaks" runs the length of Phu Quoc, with Chua Mountain being the tallest at 603 metres (1,978 ft). The island's monsoonal sub-equatorial climate is characterized by distinct rainy (June to November) and dry seasons (December to May). The annual rainfall is high, averaging 2,879 millimetres (9.446 ft). In the northern mountains up to 4,000 millimetres (13 ft) has been recorded. April and May are the hottest months, with temperature reaching 35 °C (95 °F)