The Si Phan Don is a riverine archipelago in the Mekong River, Champasak Province in southern Laos 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.
While the local economies are in general based on agriculture, the Si Phan Don archipelago has seen an increasing number of visitors. Tourism is concentrated on Don Khong, Don Det and Don Khon. Many of the other islands are rarely visited.