| Official Name: | Darreh Sir |
| Native Name: | دره سير |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Yazd |
| Subdivision Type2: | County |
| Subdivision Name2: | Taft |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Pishkuh |
| Population As Of: | 2006 |
| Population Total: | 18 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 31.6569°N 53.9614°W |
Darreh Sir (fa|دره سير, also Romanized as Darreh Sīr and Darrahsīr) is a village in Pishkuh Rural District, in the Central District of Taft County, Yazd Province, Iran. As of the 2006 census, its population is 18, consisting of 7 families.