| Official Name: | Lanj Rud |
| Native Name: | لنجرود |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Markazi |
| Subdivision Type2: | County |
| Subdivision Name2: | Shazand |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Zalian |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Pol-e Doab |
| Population As Of: | 2006 |
| Population Total: | 2,017 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 34.1308°N 49.1953°W |
Lanj Rud (Persian: لنجرود, also Romanized as Lanj Rūd and Lanjarūd; also known as Langarūd, Langerūd, Langrood, and Lanjrī) is a village in Pol-e Doab Rural District, Zalian District, Shazand County, Markazi Province, Iran. At the 2006 census, its population was 2,017, in 536 families.