| Official Name: | Siah Kalan |
| Native Name: | سيه كلان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | East Azerbaijan |
| Subdivision Type2: | County |
| Subdivision Name2: | Varzaqan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Ozomdel-e Shomali |
| Population As Of: | 2006 |
| Population Total: | 471 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 38.6131°N 46.7408°W |
Siah Kalan (Persian: سيه كلان, also Romanized as Sīāh Kalān, Sīah Kalān, Siyah Kalan, and Sīah Kalān; also known as Siahkuliān, Sīāh Kūlyān, and Siakh-Kulan) is a village in Ozomdel-e Shomali Rural District, in the Central District of Varzaqan County, East Azerbaijan Province, Iran. At the 2006 census, its population was 471, in 119 families.