| Official Name: | Posht Tang-e Shayengan |
| Native Name: | پشت تنگ شاينگان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kermanshah |
| Subdivision Type2: | County |
| Subdivision Name2: | Ravansar |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Dowlatabad |
| Population As Of: | 2006 |
| Population Total: | 47 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 34.6739°N 46.405°W |
Posht Tang-e Shayengan (Persian: پشت تنگ شاينگان, also Romanized as Posht Tang-e Shāyengān; also known as Posht Tang-e Shāygān) is a village in Dowlatabad Rural District, in the Central District of Ravansar County, Kermanshah Province, Iran. At the 2006 census, its population was 47, including 9 families.