| Official Name: | Do Ab |
| Native Name: | دواب |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | West Azerbaijan |
| Subdivision Type2: | County |
| Subdivision Name2: | Oshnavieh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Nalus |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Oshnavieh-ye Jonubi |
| Population As Of: | 2006 |
| Population Total: | 218 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.9256°N 45.1961°W |
Do Ab (Persian: دواب, also Romanized as Do Āb and Doāb; also known as Doābād) is a village in Oshnavieh-ye Jonubi Rural District, Nalus District, Oshnavieh County, West Azerbaijan Province, Iran. At the 2006 census, its population was 218, in 41 families.