| Official Name: | Ganj Darreh-ye Sofla |
| Native Name: | گنج دره سفلي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Lorestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Delfan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Mirbag-e Jonubi |
| Population As Of: | 2006 |
| Population Total: | 74 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.8297°N 47.8453°W |
Ganj Darreh-ye Sofla (Persian: گنج دره سفلي, also Romanized as Ganj Darreh-ye Soflá; also known as Ganjereh-ye Vostā) is a village in Mirbag-e Jonubi Rural District, in the Central District of Delfan County, Lorestan Province, Iran. At the 2006 census, its population was 74, in 18 families.