The Si Phan Don (Lao: ສີ່ພັນດອນ; meaning '4,000 islands') is a riverine archipelago in the Mekong River, Champasak Province in southern Laos.[1] Si Phan Don is part of 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 (the largest), Don Som (the second largest), 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:
- The remains of the first railway in Laos, the Don Det–Don Khon narrow gauge railway, built by the French to bypass the Khone Phapheng Falls and enable vessels, freight, and passengers to travel along the Mekong River.
- The Khone Phapheng Falls, a succession of impassable rapids that gave rise to the construction of the railway.
In the past, timber was logged on the islands, but it is now regulated; illegal logging incurs stiff penalties.
While the local economies are predominantly based on agriculture, the Si Phan Don archipelago has seen an increasing number of visitors. Tourism is concentrated on Don Khong, Don Det, Don Khon and small numbers on Don Som. Many of the other islands are rarely visited.
Gallery
 River bank of Don Khon with stilt wooden houses River bank of Don Khon with stilt wooden houses
 Mekong beach near Don Loppadi Mekong beach near Don Loppadi
 Transport of buffalos on the Mekong (from Don Det) Transport of buffalos on the Mekong (from Don Det)
 Mekong pirogue at sunset, Don Puay Mekong pirogue at sunset, Don Puay
 Man watering cucumbers on small island Man watering cucumbers on small island
 Kitchen garden on a Mekong bank, Don Loppadi Kitchen garden on a Mekong bank, Don Loppadi
_in_the_Mekong.jpg.webp) Flooded Albizia Saman (rain tree), Don Loppadi Flooded Albizia Saman (rain tree), Don Loppadi
 Wooden fence, Si Phan Don Wooden fence, Si Phan Don
 Children playing at sunset on a Mekong bank, Don Loppadi Children playing at sunset on a Mekong bank, Don Loppadi
 Pirogue on the Mekong under grey clouds before a storm Pirogue on the Mekong under grey clouds before a storm
 Water reflection of a smiling woman planting rice Water reflection of a smiling woman planting rice
 Boy plowing with a tractor at sunset in Don Det Boy plowing with a tractor at sunset in Don Det
 Opaque and mirroring green paddy fields with palm tree Opaque and mirroring green paddy fields with palm tree
 Two Arecaceae (palm trees) in the fields viewed through a hole in a tree stump damaged by fire in the island of Don Tao, at sunrise Two Arecaceae (palm trees) in the fields viewed through a hole in a tree stump damaged by fire in the island of Don Tao, at sunrise
 
References
- ↑ "FOUR THOUSAND ISLANDS (SI PHAN DON)". Tourism Marketing Department Laos. Archived from the original on 27 October 2018. Retrieved 27 October 2018.
14°03′00″N 105°50′24″E / 14.05000°N 105.84000°E
