同塔省
It is bordered to the north by Tân Châu, the west by Châu Đốc and Châu Phú District, the southeast by Chợ Mới, and the east by Đồng Tháp Province. All four sides of Phú Tân are surrounded by waterways and rivers, effectively making it an island. These are the Tiền River in the east, Vĩnh An canal (linking the river with Hậu River) in the north and northwest, and Vàm Nao River in the south and southwest, which flows into the Bassac River.