The Si Phan Don is a riverine archipelago in the Mekong River, Champasak Province in southern Laos. Si Phan Don is part of the Khong District, including the islands and part of the mainland in the east. Si Phan Don is dotted with numerous islands, half of which are submerged when the Mekong River is in flood. The principal islands of Si Phan Don are Don Khong, Don Som, Don Det and Don Khon. Si Phan Don borders Cambodia and historical and cultural ties link the people on both side of the border. Pakse is the closest of the bigger cities in Laos to the area.
Key features of the Si Phan Don archipelago include:
Coordinates 14°5'10.674" N 105°50'58.182" E