| Official Name: | Qarah Aghaj |
| Native Name: | قره اغاج |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Hamadan |
| Subdivision Type2: | County |
| Subdivision Name2: | Bahar |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Salehabad |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Deymkaran |
| Population As Of: | 2006 |
| Population Total: | 517 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.0508°N 48.2972°W |
Qarah Aghaj (Persian: قره اغاج, also Romanized as Qarah Āghāj and Qareh Āghāj; also known as Ghareh Aghaj, Qaraghāch, Qarah Āqāj, and Qareh Āqāj) is a village in Deymkaran Rural District, Salehabad District, Bahar County, Hamadan Province, Iran. At the 2006 census, its population was 517, in 111 families.