| Official Name: | Tash-e Sofla |
| Native Name: | تاش سفلي |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Semnan |
| Subdivision Type2: | County |
| Subdivision Name2: | Shahrud |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Bastam |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Kharqan |
| Population As Of: | 2006 |
| Population Total: | 149 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.5589°N 54.675°W |
Tash-e Sofla (fa|تاش سفلي, also Romanized as Tāsh-e Soflá; also known as Tāsh-e Pā’īn) is a village in Kharqan Rural District, Bastam District, Shahrud County, Semnan Province, Iran. At the 2006 census, its population was 149, in 41 families.