| Official Name: | Shahrak-e Posht Gach |
| Native Name: | شهرك پشت گچ |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kohgiluyeh and Boyer-Ahmad |
| Subdivision Type2: | County |
| Subdivision Name2: | Bahmai |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Bahmai-ye Garmsiri-ye Jonubi |
| Population As Of: | 2006 |
| Population Total: | 186 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 30.9731°N 50.0789°W |
Shahrak-e Posht Gach (Persian: شهرك پشت گچ; also known as Posht Gach) is a village in Bahmai-ye Garmsiri-ye Jonubi Rural District, in the Central District of Bahmai County, Kohgiluyeh and Boyer-Ahmad Province, Iran. At the 2006 census, its population was 186, in 36 families.