The Duong Dong River is the largest and most important river on Phu Quoc. It originates from the mountain ranges of the Ham Ninh massif in the east, then meanders for about 15 kilometers before flowing out to the western coast at Cua Duong, right beside the iconic Dinh Cau Cape. At the river mouth lies a large sandbar, creating a distinctive landscape typical of Phu Quoc’s western estuary region. The river has played a vital role in shaping Duong Dong Town, the oldest and most bustling urban center of the island.
In earlier times, when road networks were not yet developed, waterways were almost the only means of transporting goods between the island and the mainland. This made the lower section of the Duong Dong River the heart of Phu Quoc’s trade activities. Duong Dong Market, located right at the riverbank, has always been lively: fishing boats continuously dock, fishermen sort their catch, traders rush to buy seafood, and goods are quickly transported into the market. Visitors love this area for the abundance of fresh seafood, especially herring and squid. Fresh herring is often prepared on the spot into herring sashimi salad, served with forest herbs and Phu Quoc fish sauce—one of the island’s signature dishes enjoyed for generations.
As you travel upstream, the scenery gradually changes. Houses become sparse, making way for boatyards, ship repair workshops, and the island’s traditional fish sauce barrel houses. The riverbanks grow increasingly green with coconut palms, mangroves, nipa palms, and melaleuca trees. The river stretches over 10 kilometers and winds gracefully like a dragon. About 3 kilometers from the river mouth, the terrain transitions into midland valleys where the river narrows, becomes shallower, and reveals several submerged sandbars, a characteristic feature of rivers flowing through mountainous forest areas on Phu Quoc.
Today, despite the rapid development of Duong Dong Town—with new neighborhoods, bridges, and modern infrastructure—the Duong Dong River retains its rustic charm and fundamental role. It remains a safe anchorage for fishing boats, the main artery of the island’s seafood trade, a source of natural water, and a cultural landmark connected to Dinh Cau and Dinh Ba, where locals pray for safe voyages. More than just a natural feature, the river is a living symbol and a vital part of the identity of Duong Dong Town and Phu Quoc Island.
