| Official Name: | Posht Tang-e Shah Mirza |
| Native Name: | پشت تنگ شاه ميرزا |
| 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: | Firuzabad |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Osmanvand |
| Population As Of: | 2006 |
| Population Total: | 124 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.9481°N 47.1508°W |
Posht Tang-e Shah Mirza (Persian: پشت تنگ شاه ميرزا, also Romanized as Posht Tang-e Shāh Mīrzā; also known as Posht Tang) is a village in Osmanvand Rural District, Firuzabad District, Kermanshah County, Kermanshah Province, Iran. At the 2006 census, its population was 124, in 30 families.