| Official Name: | Mianaj |
| Native Name: | ميانج |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Zanjan |
| Subdivision Type2: | County |
| Subdivision Name2: | Mahneshan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Anguran |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Anguran |
| Population As Of: | 2006 |
| Population Total: | 465 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.5289°N 47.4814°W |
Mianaj (Persian: ميانج, also Romanized as Mīānaj and Mīyānaj) is a village in Anguran Rural District, Anguran District, Mahneshan County, Zanjan Province, Iran. At the 2006 census, its population was 465, in 104 families.