| Official Name: | Ab Sefid |
| Native Name: | اب سفيد |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Fars |
| Subdivision Type2: | County |
| Subdivision Name2: | Rostam |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Rostam-e Yek |
| Population As Of: | 2006 |
| Population Total: | 36 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 30.4192°N 51.4908°W |
Ab Sefid (Persian: اب سفيد, also Romanized as Āb Sefīd) is a village in Rostam-e Yek Rural District, in the Central District of Rostam County, Fars Province, Iran. At the 2006 census, its population was 36, in 7 families.