| Official Name: | Kallar-e Sofla |
| Native Name: | كلارسفلي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chaharmahal and Bakhtiari |
| Subdivision Type2: | County |
| Subdivision Name2: | Lordegan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Rig |
| Population As Of: | 2006 |
| Population Total: | 214 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 31.4081°N 51.0447°W |
Kallar-e Sofla (Persian: كلارسفلي, also Romanized as Kallār-e Soflá; also known as Kallār-e Bāz‘alī and Kallār-e Pā’īn) is a village in Rig Rural District, in the Central District of Lordegan County, Chaharmahal and Bakhtiari Province, Iran. At the 2006 census, its population was 214, in 43 families.