| Official Name: | Kalbi Bak |
| Native Name: | Persian: كلبي بك |
| Settlement Type: | Village |
| Pushpin Map: | Iran |
| Subdivision Type: | Country |
| Subdivision Name: | Iran |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chaharmahal and Bakhtiari |
| Subdivision Type2: | County |
| Subdivision Name2: | Borujen |
| Subdivision Type3: | District |
| Subdivision Name3: | Boldaji |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Emamzadeh Hamzeh Ali |
| Population As Of: | 2016 |
| Population Total: | 838 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 31.9328°N 50.9736°W |
| Coordinates Footnotes: | [1] |
Kalbi Bak (Persian: كلبي بك) is a village in Emamzadeh Hamzeh Ali Rural District of Boldaji District, Borujen County, Chaharmahal and Bakhtiari province, Iran.
The village is populated by Lurs.[2]
At the time of the 2006 National Census, the village's population was 874 in 198 households.[3] The following census in 2011 counted 889 people in 249 households.[4] The 2016 census measured the population of the village as 838 people in 252 households. It was the most populous village in its rural district.[5]