| Official Name: | Siah Khan |
| Native Name: | سياه خان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Sistan and Baluchestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Hirmand |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Dust Mohammad |
| Population As Of: | 2006 |
| Population Total: | 10 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 31.1375°N 61.785°W |
Siah Khan (Persian: سياه خان, also Romanized as Sīāh Khān; also known as Deh-e Sīāh Khān) is a village in Dust Mohammad Rural District, in the Central District of Hirmand County, Sistan and Baluchestan Province, Iran. At the 2006 census, its population was 10, in 4 families.