| Official Name: | Sarmaj-e Hoseynkhani |
| Native Name: | سرماج حسين خاني |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kermanshah |
| Subdivision Type2: | County |
| Subdivision Name2: | Harsin |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Bisotun |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Shirez |
| Population As Of: | 2006 |
| Population Total: | 1,289 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 34.3578°N 47.5208°W |
Sarmaj-e Hoseynkhani (Persian: سرماج حسين خاني, also Romanized as Sarmāj-e Ḩoseynkhānī; also known as Sarmāj) is a village in Shirez Rural District, Bisotun District, Harsin County, Kermanshah Province, Iran. At the 2006 census, its population was 1,289, in 310 families.