| Lâm Sơn | |
| Other Name: | Sông Pha |
| Native Name: | Xã Lâm Sơn |
| Settlement Type: | Commune and village |
| Pushpin Map: | Vietnam |
| Pushpin Label Position: | top |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Vietnam |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ninh Thuận Province |
| Subdivision Type2: | District |
| Subdivision Name2: | Ninh Sơn |
| Unit Pref: | Imperial |
| Area Total Km2: | 149.06 |
| Population As Of: | 2019 |
| Population Total: | 12,254 |
| Population Density Km2: | 82 |
| Population Blank1 Title: | Ethnicities |
| Utc Offset: | +07:00 |
| Coordinates: | 11.8278°N 108.6964°W |
| Elevation M: | 221 |
Lâm Sơn is a commune (xã) and village of Ninh Sơn District, Ninh Thuận Province, Vietnam.[1]
The commune lies along Highway 27A on the western side of Ninh Thuận Province, about 40km (30miles) northwest of Phan Rang–Tháp Chàm. It is located at the foot of the scenic Ngoạn Mục Pass (locally known as the Sông Pha Pass).
Lâm Sơn was once connected to the Vietnamese railway network by the now-defunct Da Lat–Thap Cham Railway. The railway heading seaward to Thap Cham was opened in 1919, and the section inland to Da Lat opened in 1932. Due to the mountainous terrain inland from Song Pha, that section used rack rails, the only such railway in Vietnam.[2]