Phu Quoc is the largest island currently administered by Vietnam (see History). Situated in the Gulf of Thailand, the island is part of Kiên Giang province. The district of Phu Quoc includes the island proper and 21 smaller isles. The district seat, Dương Đông, which is located on the west coast, is also the largest town on this island, whose total area is 574 km².

Phu Quoc is famous for its two traditional products: fish sauce and black pepper. The rich fishing grounds offshore provides the anchovy catch from which the prized sauce is made. Pepper cultivation is located inland in the center of the island. More recently a pearl farm was established.

Tourism plays an important part of the economy with the beaches being the main draw. Phu Quoc is served by Duong Dong Airport which air links to Saigon's Tan Son Nhat Airport and Rach Gia's Rach Gia Airport. A new international airport is going to be built here. Phu Quoc is also linked with Rach Gia and Hà Tiên by fast ferry hydrofoils.

Phu Quoc is what Phuket would be if it hadn't been overrun by development. Phu Quoc island and its beaches was voted to be "The Most Cleanest and Beautiful Beach of World" by ABC News as from the end of February, 2008.