| Official Name: | Bab-e Kahnuj |
| Native Name: | بابكهنوج |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kerman |
| Subdivision Type2: | County |
| Subdivision Name2: | Jiroft |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Sarduiyeh |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Sarduiyeh |
| Population As Of: | 2006 |
| Population Total: | 76 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 29.31°N 57.29°W |
Bab-e Kahnuj (fa|بابكهنوج, also Romanized as Bāb-e Kahnūj) is a village in Sarduiyeh Rural District, Sarduiyeh District, Jiroft County, Kerman Province, Iran. At the 2006 census, its population was 76, in 20 families.