| Official Name: | Posht Tang-e Chameshk |
| Native Name: | پشت تنگ چمشک |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Lorestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Pol-e Dokhtar |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Mamulan |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Miyankuh-e Sharqi |
| Population As Of: | 2006 |
| Population Total: | 63 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.2372°N 48.2097°W |
Posht Tang-e Chameshk (Persian: پشت تنگ چمشک; also known as Chameshk-e Posht-e Tang) is a village in Miyankuh-e Sharqi Rural District, Mamulan District, Pol-e Dokhtar County, Lorestan Province, Iran. At the 2006 census, its population was 63, in 13 families.