| Official Name: | Poshteh Kash |
| Native Name: | پشته كش |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kermanshah |
| Subdivision Type2: | County |
| Subdivision Name2: | Kermanshah |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Qarah Su |
| Population As Of: | 2006 |
| Population Total: | 306 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 34.275°N 47.085°W |
Poshteh Kash (Persian: پشته كش) is a village in Qarah Su Rural District, in the Central District of Kermanshah County, Kermanshah Province, Iran. At the 2006 census, its population was 306, in 66 families.