| Official Name: | Posht Tang-e Dar Vazneh |
| Native Name: | پشت تنگ دروزنه |
| Settlement Type: | village |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Lorestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Delfan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Kakavand |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Kakavand-e Sharqi |
| Population As Of: | 2006 |
| Population Total: | 234 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
Posht Tang-e Dar Vazneh (Persian: پشت تنگ دروزنه) is a village in Kakavand-e Sharqi Rural District, Kakavand District, Delfan County, Lorestan Province, Iran. At the 2006 census, its population was 234, in 46 families.