| Official Name: | Qareh Aghaj |
| Native Name: | قره اغاج |
| 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: | Zanjanrud-e Pain |
| Population As Of: | 2006 |
| Population Total: | 384 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.7697°N 48.0961°W |
Qareh Aghaj (Persian: قره اغاج, also Romanized as Qareh Āghāj; also known as Kara-Agach, Qara Aghach, Qarah Āqāj, Qareh Āqāch, and Qareh Āqāj) is a village in Zanjanrud-e Pain Rural District, Zanjanrud District, Zanjan County, Zanjan Province, Iran. At the 2006 census, its population was 384, in 99 families.