| Phu Soi Dao | |
| Elevation M: | 2120 |
| Prominence M: | 1664 |
| Map: | Thailand |
| Map Size: | 200 |
| Label Position: | right |
| Listing: | Ultra List of mountains in Thailand |
| Location: | Lao – Thai border |
| Range: | Luang Prabang Range |
| Coordinates: | 17.7333°N 101°W |
Phu Soi Dao (French: '''Phou Soai Dao''') is a mountain in Southeast Asia. It is 2120 metres tall and rises at the south end of the Luang Prabang Range, on the border between Laos and Thailand.[1] Phu Soi Dao National Park is on the Thai side of the range in Phitsanulok and Uttaradit Provinces.[2]
Pinus kesiya, Betula alnoides, Schima wallichii and Shorea siamensis are among the species of trees present in the forest. Utricularia spinomarginata and Utricularia phusoidaoensis are endemic plants on Phu Soi Dao. There are numerous waterfalls in the range area.[3]
