| Official Name: | Mostafalu |
| Native Name: | مصطفي لو |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Zanjan |
| Subdivision Type2: | County |
| Subdivision Name2: | Khodabandeh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Afshar |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Shivanat |
| Population As Of: | 2006 |
| Population Total: | 143 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.9489°N 48.0289°W |
Mostafalu (Persian: مصطفي لو, also Romanized as Moşţafálū and Mostafa Loo; also known as Mustāfiu) is a village in Shivanat Rural District, Afshar District, Khodabandeh County, Zanjan Province, Iran. At the 2006 census, its population was 143, in 30 families.