| Official Name: | Siahak |
| Native Name: | سياهك |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Hormozgan |
| Subdivision Type2: | County |
| Subdivision Name2: | Hajjiabad |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Fareghan |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Ashkara |
| Population As Of: | 2006 |
| Population Total: | 361 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 28.0108°N 56°W |
Siahak (fa|سياهك, also Romanized as Sīāhak) is a village in Ashkara Rural District, Fareghan District, Hajjiabad County, Hormozgan Province, Iran. At the 2006 census, its population was 361, in 104 families.