| Official Name: | Chehel Gaz |
| Native Name: | چهل گز |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ardabil |
| Subdivision Type2: | County |
| Subdivision Name2: | Ardabil |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Sardabeh |
| Population As Of: | 2006 |
| Population Total: | 196 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 38.3072°N 48.0775°W |
Chehel Gaz (Persian: چهل گز; also known as Chākīāl, Chalgial, and Chelgazī) is a village in Sardabeh Rural District, in the Central District of Ardabil County, Ardabil Province, Iran. At the 2006 census, its population was 196, in 37 families.