| Official Name: | Chaq-e Firuzjai |
| Native Name: | چاق فيروزجائي |
| Settlement Type: | village |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Mazandaran |
| Subdivision Type2: | County |
| Subdivision Name2: | Babol |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Bandpey-ye Gharbi |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Khvosh Rud |
| Population As Of: | 2006 |
| Population Total: | 29 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
Chaq-e Firuzjai (Persian: چاق فيروزجائي, also Romanized as Chāq-e Fīrūzjā’ī) is a village in Khvosh Rud Rural District, Bandpey-ye Gharbi District, Babol County, Mazandaran Province, Iran. At the 2006 census, its population was 29, in 8 families.