| Official Name: | Lah Ab |
| Native Name: | له اب |
| Settlement Type: | village |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Fars |
| Subdivision Type2: | County |
| Subdivision Name2: | Firuzabad |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Meymand |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Par Zeytun |
| Population As Of: | 2006 |
| Population Total: | 42 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
Lah Ab (Persian: له اب, also Romanized as Lah Āb) is a village in Par Zeytun Rural District, Meymand District, Firuzabad County, Fars Province, Iran. At the 2006 census, its population was 42, in 10 families.