| Official Name: | Qarah Aghaj-e Sofla |
| Native Name: | قره اغاج سفلي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Zanjan |
| Subdivision Type2: | County |
| Subdivision Name2: | Zanjan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Zanjanrud |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Chaypareh-ye Pain |
| Population As Of: | 2006 |
| Population Total: | 356 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.9583°N 47.5142°W |
Qarah Aghaj-e Sofla (Persian: قره اغاج سفلي, also Romanized as Qarah Āghāj-e Soflá; also known as Qarah Āqāj-e Soflá and Qareh Āqāj-e Soflá) is a village in Chaypareh-ye Pain Rural District, Zanjanrud District, Zanjan County, Zanjan Province, Iran. At the 2006 census, its population was 356, in 64 families.