| Official Name: | Zanasuj |
| Native Name: | زناسوج |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Qazvin |
| Subdivision Type2: | County |
| Subdivision Name2: | Qazvin |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Alamut-e Gharbi |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Rudbar-e Shahrestan |
| Population As Of: | 2011 |
| Population Total: | 145 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.4303°N 50.1878°W |
Zanasuj (Persian: زناسوج, also Romanized as Zanāsūj) is a village in Rudbar-e Shahrestan Rural District, Alamut-e Gharbi District, Qazvin County, Qazvin Province, Iran. At the 2006 census, its population was 10, in 4 families.