| Official Name: | Chandab |
| Native Name: | چند اب |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Semnan |
| Subdivision Type2: | County |
| Subdivision Name2: | Garmsar |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Eyvanki |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Eyvanki |
| Population As Of: | 2006 |
| Population Total: | 425 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.4247°N 51.9353°W |
Chandab (Persian: چند اب, also Romanized as Chandāb; also known as Gondā (Persian: گندا) and Gandāb) is a village in Eyvanki Rural District, Eyvanki District, Garmsar County, Semnan Province, Iran. At the 2006 census, its population was 425, in 96 families.